Practice HVAC Licensing Exam

 

  1. A tracer wire buried with plastic gas piping shall be minimum ___AWG
  2. a) 16
  3. b) 14
  4. c) 18
  5. d) 20

 

  1. The minimum ventilation rate for living area of a residence is the greater of 15 cfm per person or ____ air changes per hour
  2. a) .5
  3. b) .35
  4. c) .40
  5. d) 1

 

  1. When using a test pressure of 10 psig, the test gauge shall not be capable of reading pressures greater than_____PSIG
  2. a) 100
  3. b) 80
  4. c) 50
  5. d) 75

 

  1. The use of gypsum boards to for plenums shall be limited to systems where the temperature does not exceed _______ degrees F and the temperature of the conveyed air is kept above the dew point
  2. a) 125
  3. b) 110
  4. c) 250
  5. d) 95

 

  1. A sauna room shall have a vent opening above the door at least 4 inches by ____ inches
  2. a) 6
  3. b) 12
  4. c) 10
  5. d) 8

 

  1. Gas piping shall be labeled at intervals not exceeding ______ feet
  2. a) 8
  3. b) 5
  4. c) 4
  5. d) 3

 

  1. A JOINT OBTAINED BY THE JOINING OF METAL PARTS WITH METALLIC MIXTURES OF ALLOYS WHICH MELT AT 1000 DEGREES F, IS CALLED A __________ JOINT.
  2. a) WELDED
  3. b) MECHANICAL
  4. c) BRAZED
  5. d) SOLDERED

 

  1. If an 6″ X 10″ duct is terminated with a metal louver (75% free area), the louver must be a minimum _____ square inches
  2. a) 90
  3. b) 60
  4. c) 120
  5. d) 80

 

  1. A gas regulator that reduces incoming pressure between .5 and 5 psig to a lower pressure is called a __________.
  2. a) service entrance regulator
  3. b) low pressure regulator
  4. c) high pressure regulator
  5. d) medium pressure regulator

 

  1. Unless otherwise specified by the manufacturer, vents shall terminate not less than ______feet above the highest connected appliance
  2. a) 12
  3. b) 10
  4. c) 8
  5. d) 5

 

  1. When obtaining combustion air from a crawl space, the free area of the crawl space vent to the outside must be a minimum ________ the size of the combustion air opening
  2. a) 4 times
  3. b) 2.5 times
  4. c) 3 times
  5. d) 2 times

 

  1. A type I hood, 5 foot long, wall mounted canopy, serving medium-duty appliances shall have a minimum capacity of _____ CFM
  2. a) 1000
  3. b) 2500
  4. c) 500
  5. d) 1500

 

  1. Downdraft kitchen exhaust ducts may be constructed of______.
  2. a) all of the above
  3. b) sheet metal
  4. c) aluminum
  5. d) PVC

 

  1. When combustion air is mechanically forced into a room, a minumum rate of 1 cfm per _____ btu/h of combined input rating of all installed appliances must be supplied
  2. a) 2400
  3. b) 3400
  4. c) 1000
  5. d) 2000

 

  1. The maximum cfm of duct leakage allowed with a air handler in place for a 1500 square foot home with .1 inch w.c. is____.
  2. a) 75
  3. b) 150
  4. c) 60
  5. d) 80

 

  1. Plastic pipe shall not be operated at pressures greater than ______ psig for LP gas
  2. a) 100
  3. b) 15
  4. c) 30
  5. d) 10

 

  1. Semi-ridgid metallic tubing used as appliance connectors shall not exceed ___ feet
  2. a) 8
  3. b) 3
  4. c) 6
  5. d) 5

 

  1. For other than appliances installed in fireplaces, a gas shutoff valve shall be located within ___feet of the appliance
  2. a) 3
  3. b) 4
  4. c) 10
  5. d) 6

 

  1. Appliance pits greater than 12 inches deep shall be lined with masonry extending ___inches above the adjoining grade
  2. a) 4
  3. b) 2
  4. c) 3
  5. d) 6

 

  1. Gas piping may be joined in concealed locations using which of the following methods?
  2. a) brazing
  3. b) compression fittings
  4. c) unions
  5. d) swing joints

 

  1. 1/2″ copper tubing must be supported a minimum of _______ feet when installed horizontally
  2. a) 4
  3. b) 10
  4. c) 8
  5. d) 6

 

  1. Equipment, appliances or material included in a list published by a nationally recognized testing laboratory concerned with product evaluation and states that the above item meets recognized standards is said to be _____________
  2. a) approved
  3. b) listed
  4. c) certified
  5. d) tested

 

  1. A type I hood is not required for _______>
  2. a) griddles
  3. b) hot dog cookers
  4. c) fryers
  5. d) broilers

 

  1. REFRIGERANTS REMOVED FROM A SYSTEM IN ANY CONDITION WITHOUT NECESSARILY TESTING OR PROCESSING THEM ARE CALLED___________.
  2. a) RECYCLED REFRIGERANTS
  3. b) RECIEVED REFRIGERANTS
  4. c) RECOVERED REFRIGERANTS
  5. d) RECLAIMED REFRIGERANTS

 

  1. THE MAXIMUM ALLOWABLE HORIZONTAL LENGTH OF A CATEGORY I APPLIANCE SINGLE WALL VENT CONNECTOR IS _______% OF THE HEIGHT OF THE VENT
  2. a) 50
  3. b) 25
  4. c) 75
  5. d) 100

 

  1. A commercial stainless steel duct must be constructed of ______ gage thickness
  2. a) 20
  3. b) 14
  4. c) 18
  5. d) 16

 

  1. A NON LOAD BEARING STUD MAY BE NOTCHED ______% OF ITS DEPTH.
  2. a) 30
  3. b) 40
  4. c) 25
  5. d) 15

 

  1. CATEGORY I GAS EQUIPMENT MAY BE VENTED WITH WHICH OF THE FOLLOWING TYPES OF VENTS?
  2. a) ALL THE ABOVE
  3. b) CHIMNEY WITH CLAY LINER
  4. c) TYPE B
  5. d) SINGLE WALL METAL

 

  1. RECLAIMED REFRIGERANTS SHALL NOT BE REUSED IN A DIFFERENT OWNERS EQUIPMENT UNLESS TESTED AND FOUND TO MEET THE PURITY REQUIREMENTS OF
  2. a) ARI 700
  3. b) ASTM A53
  4. c) NFPA 54
  5. d) ASHRAE 34

 

  1. IF A GALLON OF OIL CONTAINING 140,000 BTU’S SELLS FOR $1.25, HOW MUCH WILL 1,000,000 BTU’S COST WHEN USED IN AN 80% AFUE OIL FURNACE
  2. a) $8.93
  3. b) $11.16
  4. c) $14.00
  5. d) $12.78

 

  1. For 3/4 inch steel gas pipe hangers or supports shall be spaced not farther than _____feet apart
  2. a) 10
  3. b) 4
  4. c) 8
  5. d) 6

 

  1. An auxiliary drain pan must have a minimum depth of ____ inche/s
  2. a) 1.5
  3. b) 1
  4. c) 1.25
  5. d) 2

 

  1. A 12″ ROUND DUCT HAS A RECTANGULAR EQUIVALENT OF
  2. a) 16 X 8
  3. b) 15 X 8
  4. c) 14 X 8
  5. d) 17 X 8

 

  1. GAS APPLIANCE CONNECTORS SHALL NOT PASS THROUGH ANY OF THE FOLLOWING EXCEPT
  2. a) WALLS
  3. b) APPLIANCE HOUSINGS
  4. c) FACTORY BUILT FIREPLACES
  5. d) FLOORS

 

  1. Sauna heaters shall have a thermostat that limits the room temperature to _______ degrees F
  2. a) 194
  3. b) 144
  4. c) 114
  5. d) 120

 

  1. The minimum R value of duct insulation installed in areas other than the conditioned space or attics is _________
  2. a) R 5
  3. b) R 6
  4. c) R 8
  5. d) R 4

 

  1. ___________ piping may only be used for gas piping outside and underground.
  2. a) Aluminum
  3. b) Copper
  4. c) Steel
  5. d) Plastic

 

  1. The maximum length allowed for a 4 inch dryer duct with two 90 degree bends is ______ feet
  2. a) 25
  3. b) 35
  4. c) 30
  5. d) 40

 

  1. The minimum return opening to an 80,000 btuh (output rating) forced air furnace shall be _____ square inches.
  2. a) 160
  3. b) 80
  4. c) 140
  5. d) 100

 

  1. A location that cannot be accessed without damageing permanent parts of a building is called a/an _____ location
  2. a) inaccessible
  3. b) assessible
  4. c) concealed
  5. d) ready access

 

  1. AN APPLIANCE RATED AT 75,000 BTUH INPUT MUST BE PLACED IN A ROOM CONTAINING A MINIMUM ______ CUBIC FEET, IF IT DOES NOT RECEIVE COMBUSTION AIR FROM OUTDOORS.
  2. a) 3750
  3. b) 7500
  4. c) 1500
  5. d) 75000

 

  1. A FUEL FIRED FURNACE, MEASURING 22 CUBIC FEET MUST BE PLACED IN A ROOM GREATER THAN __________ CUBIC FEET IF IT IS NOT APPROVED FOR CLOSET INSTALATION. This provision is found only in 2012 codes and earlier.
  2. a) 264
  3. b) 352
  4. c) 220
  5. d) 564

 

  1. The ignition source of an appliance shall be elevated not less than _____ unless it is listed as flammable ignition resistant
  2. a) 6 feet
  3. b) 18 inches
  4. c) 4 feet
  5. d) 24 inches

 

  1. Transition ducts used to connect commercial dryers to exhaust duct shall be limited to ___ feet in length
  2. a) 4
  3. b) 3
  4. c) 6
  5. d) 8

 

  1. A label shall be affixed to a gas appliance with all the following information except _______
  2. a) BTUH rating
  3. b) manufacture date
  4. c) type of fuel used
  5. d) minimum clearances

 

  1. The miminum size supply line to an oil furnace shall be _______ inch.
  2. a) 1/8
  3. b) 1/16
  4. c) 3/8
  5. d) 1/4

 

  1. A BLOWER WITH AN EXTERNAL STATIC PRESSURE OF .55″ WC IS CONNECTED TO A 70 FT. LONG DUCT. THE SYSTEM INCLUDES (WITH CORESPONDING PRESSURE DROPS) REGISTERS AND GRILLS (.03″ WC EACH), A COOLING COIL (.15″ WC) AND FILTER (.10″ WC).   WHAT IS THE TOTAL AVAILABLE STATIC  PRESSURE REMAINING FOR SIZING THE DUCT?
  2. a) .15″ WC
  3. b) .17″ WC
  4. c) .30″ WC
  5. d) .24″ WC

 

  1. WHAT IS THE VELOCITY OF 1400 CFM OF AIR IN A DUCT MEASURING 12″ X 30″?
  2. a) 467 FPM
  3. b) 560 FPM
  4. c) 3.8 FPM
  5. d) 360 FPM

 

  1. A system desIgned to shut off the gas supply to the burners if the oxygen in the surrounding atmosphere is reduced to a predetermined level is called a ___________
  2. a) carbon dioxide detector
  3. b) oxygen depletion shutoff system
  4. c) automatic shut of valve
  5. d) air regulator system

 

  1. A 75,000 BTUH (INPUT RATING) 80% AFUE FURNACE HAS A TEMPERATURE RISE OF 45-DEGREES. WHAT IS THE CFM?
  2. a) 1667
  3. b) 1212
  4. c) 1515
  5. d) 1175

 

  1. Appliances installed on roofs greater than ______ feet high must have a permanent means of access.
  2. a) 18
  3. b) 20
  4. c) 16
  5. d) 24

 

  1. A fire damper install at a 2 hour fire rated wall shall have a minimum rating of _______ hours
  2. a) 2
  3. b) 1.5
  4. c) 3
  5. d) 1

 

  1. Shield plates placed on studs to protect gas piping shall extend _____ inches to each side of the stud.
  2. a) 1.5
  3. b) 3
  4. c) 4
  5. d) 2

 

  1. The minimum diameter of a close dryer duct shall be ______ inches
  2. a) 6
  3. b) 5
  4. c) 3
  5. d) 4

 

  1. A location that cannot be accessed without damaging permanent parts of a building is called a/an _____ location
  2. a) concealed
  3. b) assessable
  4. c) inaccessible
  5. d) ready access

 

  1. Screens used to protect intake openings for ventilation may not have a mesh less than____ inch.
  2. a) 1/16
  3. b) 1/2
  4. c) 1/8
  5. d) 1/4

 

  1. THE MINIMUM INSULATION R-VALUE FOR REFRIGERANT LINES FOR A RESIDENCE IS ____.
  2. a) R-3
  3. b) R-2
  4. c) 5-5
  5. d) R-4

 

  1. Close dryers exhausting more than ____ cfm must be provided with make up air
  2. a) 150
  3. b) 100
  4. c) 200
  5. d) 75

 

  1. Which of the follow shall not share a type I hood
  2. a) charcoal grille
  3. b) griddle
  4. c) deep fat fryer
  5. d) pzza oven

 

  1. Underfloor accesses must be a minimum 22 inches high by _______ inches wide
  2. a) 30
  3. b) 24
  4. c) 28
  5. d) 36

 

  1. Closets containing close dryers must have a make up air opening not less than ____ square inches
  2. a) 75
  3. b) 100
  4. c) 150
  5. d) 50

 

  1. Grease ducts in enclosures shall have a clearance of ________ inches to construction of non combustible gypsum attached to non combustible structures
  2. a) 18
  3. b) 12
  4. c) 6
  5. d) 3

 

  1. Which of the following heating systems must have its efficiency posted on a certificate placed on or inside the electrical distribution panel of new residential construction
  2. a) Electric baseboard
  3. b) unvented room heater
  4. c) gas furnace
  5. d) electric furnace

 

  1. A ventilation system in a 20,000 square foot enclosed parking garage shall be capable of producing a minimum of _____ cfm, while full-on.
  2. a) 10,000
  3. b) 20,000
  4. c) 5000
  5. d) 15,000

 

  1. IN ORDER TO SUPPLY OUTDOOR COMBUSTION AIR USING THE TWO OPENING METHOD WITH HORIZONTAL DUCTS, WHAT DUCT SIZE BELOW WOULD BE THE MINIMUM NEEDED TO HANDLE A 140,000 BTUH FURNACE
  2. a) 3.5″ X 10″
  3. b) 8.5″ X 10″
  4. c) 7″ X 10″
  5. d) 14′ X 10″

 

  1. Factory built fireplaces must be listed and labeled according to __________.
  2. a) UL 348
  3. b) UL127
  4. c) UL 187
  5. d) UL 124

 

  1. A single wall oil heat chimney connector shall have ______ clearance from combustibles
  2. a) 9
  3. b) 18
  4. c) 36
  5. d) 12

 

  1. A plastic condensate pan must have a minimum thickness of ______ inch
  2. a) .0250
  3. b) .0625
  4. c) .0375
  5. d) .0276

 

  1. If natural ventilation is used, a building, measuring 3000 square feet, must have a minimum openable area of ______ square feet.
  2. a) 120
  3. b) 150
  4. c) 300
  5. d) 450

 

  1. Duct smoke detectors shall comply with______.
  2. a) UL 268
  3. b) UL 181
  4. c) ASTM 34
  5. d) NFPA 72

 

  1. A 2 inch diameter gas pipe must be purged with an inert gas before opening if it is greater than _____feet long.
  2. a) all of the above
  3. b) 30
  4. c) 50
  5. d) 40

 

  1. Unless protected by approved area smoke detectors, smoke detectosrs are required in the return air duct or plenum on any system with a design capacity greater than _______cfm.
  2. a) 1500
  3. b) 2000
  4. c) 4000
  5. d) 3000

 

  1. IF A CONTRACTOR WORKS ON 15% PROFIT, WHAT WOULD HIS SALES HAVE TO BE TO MAKE $75,000?
  2. a) $600,000
  3. b) $112,000
  4. c) $500,000
  5. d) $862,500

 

  1. A single wall low heat 6 inch diameter chimney connecter shall have a minimum thickness of ______
  2. a) 22
  3. b) 16
  4. c) 26
  5. d) 24

 

  1. The verical distance between the front lower lip of a type I or II hood and the surface of the appliance shall not extend more than ______ feet
  2. a) 3.6
  3. b) 4
  4. c) 2
  5. d) 3

 

  1. Vented wall furnaces shall be located so that a door cannot swing within _____ inches of the air inlets or outlets of such furnace measures at right angles to the openings
  2. a) 12
  3. b) 18
  4. c) 36
  5. d) 24

 

  1. FUEL FIRED APPLIANCES SHALL NOT BE LOCATED IN _______.
  2. a) BASEMENTS
  3. b) BEDROOMS
  4. c) LIVING ROOMS
  5. d) KITCHENS

 

  1. THE VELOCITY OF 250 CFM OF AIR IN A FLEXIBLE, SPIRAL WIRE HELIX CORE DUCT SIZED AT .08″ WC STATIC PRESSURE IS ______.
  2. a) 500 FPM
  3. b) 900 FPM
  4. c) 400 FPM
  5. d) 750 FPM

 

  1. Which of the following is not required for a heat pump installation
  2. a) load calculation
  3. b) programmable thermostat
  4. c) a permit
  5. d) a means of controlling electric resistance heat from operating when the heat pump can handle the load

 

  1. Exhaust outlets that terminate above a roof shall have a discharge outlet not less than ___ inches above the roof surface
  2. a) 36
  3. b) 30
  4. c) 48
  5. d) 40

 

  1. A CUSTOMER MOVES UP FROM AN 8 SEER TO A 13 SEER AIR CONDITIONER. WHAT WOULD HIS YEARLY SAVING BE IF HE WAS PAYING $650 PER YEAR FOR AIR CONDITIONING
  2. a) $197
  3. b) $325
  4. c) $250
  5. d) $260

 

  1. A CEILING HAS A TOTAL U-VALUE OF .07. WHAT IS THE NEW R-VALUE IF R-19 IS ADDED?
  2. a) 33.28
  3. b) 32.28
  4. c) 30.28
  5. d) 31.28

 

  1. The control side of a floor furnace must have a minimum _____inches clearance
  2. a) 24
  3. b) 18
  4. c) 20
  5. d) 12

 

  1. Which of the following must have a flame spread rating no greater than 5 feet when installed in plenums.
  2. a) pneumatic tubing
  3. b) wiring
  4. c) all the above
  5. d) fire sprinkler piping

 

  1. The maximum size unvented gas heater that may be installed in a residential bathroom measuring 1600 cubic feet is________btuh
  2. a) 8000
  3. b) 4000
  4. c) 3000
  5. d) 6000

 

  1. The slope of a 24 foot horizontal grease duct must be at least ___ inch.
  2. a) 1/8

1/8

  1. b) 1/4
  2. c) 3/4
  3. d) 1/2

 

  1. If a water level detection device is used in an auxiliary drain pan it must conform to_______.
  2. a) ASTM 243
  3. b) UL 508
  4. c) UL 181
  5. d) ASI 84

 

  1. The vent cap of an oil tank must have a screen mesh no finer than No. _______
  2. a) 10
  3. b) 4
  4. c) 6
  5. d) 8

 

  1. WHAT IS THE DESIGN FRICTION RATE WHEN THE AVAILABLE STATIC PRESSURE FOR THE DUCT SYSTEMIS .36″ WC AND THE RUN WITH THE LONGEST EFFECTIVE LENGTH IS 375 FEET?
  2. a) .05″ WC
  3. b) .08″ WC
  4. c) .15″ WC
  5. d) .10″ WC

 

  1. Passageways in attics shall not be less than _____ inches wide
  2. a) 24
  3. b) 20
  4. c) 30
  5. d) 22

 

  1. IN A ROOM THAT IS LARGE IN COMPARISON WITH THE SIZE OF THE EQUIPMENT, AN APPLIANCE THAT REQUIRES 18″ CLEARANCE ON ITS SIDES, MAY HAVE ITS CLEARANCE REDUCED TO ______ IF .024″ SHEETMETAL WITH A VENTILATED AIR SPACE IS USED TO PROTECT THE COMBUSTIBLE SURFACE.
  2. a) 6”
  3. b) MAY NOT HAVE CLEARANCE REDUCED
  4. c) 12”
  5. d) 9”

 

  1. A vertical pipe supplying gas is a________
  2. a) riser
  3. b) leader
  4. c) upright
  5. d) standpipe

 

  1. Copper piping shall not be used if the gas contains more than __ grains of hydrogen sulfide per 100 standard cubic feet.
  2. a) .3
  3. b) 3
  4. c) .5
  5. d) 6

 

  1. Brazing alloys used on gas piping shall not contain more than_____ percent phosphorus
  2. a) .005
  3. b) .5
  4. c) 5
  5. d) .05

 

  1. Duct insulation installed within ____inches of a type I hood shall be noncombustible of be listed for the application
  2. a) 18
  3. b) 6
  4. c) 12
  5. d) 24

 

  1. The minimum distance between the cooking surface and a grease filter serving burners with flames is _____ feet
  2. a) 1
  3. b) 3.5
  4. c) .5
  5. d) 2

 

  1. The minimum gage for a 14 inch round galvanized air duct is ___.
  2. a) 30
  3. b) 28
  4. c) 26
  5. d) 24

 

  1. FOR A BUILDING TO BE MAINTAINED AT 70 F, HOW MANY BTUH ARE REQUIRED TO OFFSET 300 CFM OF 20 F OUTDOOR VENTILATION?
  2. a) 16,500
  3. b) 6,600
  4. c) 6,000
  5. d) 1.400

 

  1. The maximum operating pressure of LP gas systems shall not exceed ____ unless the building or area is constructed according to NFPA 58, Chapter 10
  2. a) 10
  3. b) .5
  4. c) 5
  5. d) 20

 

  1. THE AMERICANS WITH DISABILITIES ACT APPLIES TO ALL EMPLOYERS WHO HAVE _______ OR MORE EMPLOYEES
  2. a) 25
  3. b) 15
  4. c) 50
  5. d) 10

 

  1. Flexible air ducts______.
  2. a) shall not be limited in length
  3. b) shall be limited to 14 feet in length
  4. c) shall be labeled 181-B
  5. d) May convey air at up to 275 degrees

 

  1. The minimum allowable HSPF rating of an air-cooled residential heat pump is _________
  2. a) 7.0
  3. b) 8.2
  4. c) 6.8
  5. d) 7.7

 

  1. A 500 SQUARE FOOT CONFERENCE ROOM REQUIRES _______CFM OF OUTDOOR VENTILATION
  2. a) 125
  3. b) 250
  4. c) 75
  5. d) 150

 

  1. When mechanically ventilating a 1500 square foot conference room in an office building, how many CFM of outdoor air are required?
  2. a) 375
  3. b) 1000
  4. c) 50
  5. d) 3000

 

  1. Access points for inspecting and servicing fire dampers shall be labeled FIRE DAMPER with letter no less than _____ inch/s high
  2. a) .5
  3. b) .75
  4. c) 2
  5. d) 1

 

  1. Unless protected from vehicle impact, appliances shall be installed a minimum ______ feet above the floor of a private garage
  2. a) 6
  3. b) 5
  4. c) 8
  5. d) 9

 

  1. Cleanouts located on horizontal grease ducts shall be placed not more than ____feet apart
  2. a) 100
  3. b) 15
  4. c) 20
  5. d) 10

 

  1. Unless otherwise approved, ducts shall not be instlalled within ____ inches of earth.
  2. a) 4
  3. b) 3
  4. c) 5
  5. d) 6

 

  1. THE DISTANCE FROM A METER TO A NATRUAL GAS WATER HEATER (40,000 BTUH) IS 30 FEET. 20 FEET FURTHER DOWN THE LINE IS A FURNACE (120,000 BTUH).  WHAT IS THE MINIMUM PI[E SIZE THAT MUST BE USED BETWEEN THE WATER HEATER AND FURNACE? (PRESSURE LESS THAN 2 LBS, PRESSURE DROP = .05)?
  2. a) 1/2″
  3. b) 3/4″
  4. c) 1″
  5. d) 3/8″

 

  1. A gas regulator that reduces incoming pressure between .5 and 5 psig to a lower pressure is called a __________.
  2. a) low pressure regulator
  3. b) service entrance regulator
  4. c) high pressure regulator
  5. d) medium pressure regulator

 

  1. A HEAT PUMP IN A RESIDENCE MUST BE CONTROLLED BY WHICH OF THE FOLLOWING?
  2. a) A PROGRAMABLE THERMOSTAT
  3. b) A DEVICE TO PREVENT SUPPLEMENTARY HEAT FROM COMING ON IF HEAT PUMP CAN HANDLE THE LOAD ALONE
  4. c) A DEVICE THAT ALLOWS SUPPLEMENTARY HEAT OPERATION DURING DEFROST CYCLES EXCEEDING 15 MINUTES
  5. d) A FOSSIL FUEL KIT

 

  1. When bending metallic gas pipe, the inside radius shall not be less than _____ times the diameter
  2. a) 6
  3. b) 10
  4. c) 5
  5. d) 25

 

  1. THE LARGEST A BORED HOLE MAY BE IN A 2′ x 9.5″ joist is
  2. a) 3.14″
  3. b) 3.31″
  4. c) 3″
  5. d) 2.85″

 

  1. When aluminum foil is used as a vapor retarder for duct insulation it must be minimum

_____ mils thick

  1. a) 4
  2. b) 2
  3. c) 1
  4. d) 6

 

  1. A label shall be affixed to the gas appliance with all the following information except _______
  2. a) BTUH rating
  3. b) type of fuel used
  4. c) manufacture date
  5. d) minimum clearances

 

  1. Exhausted environmental air must be _____ feet from mechanical intakes
  2. a) 12
  3. b) 8
  4. c) 3
  5. d) 10

 

  1. THE MAXIMUM BTUH RATING OF AN UNVENTED GAS HEATER INSTALLED IN A 15 X 20 ROOM WITH 8 FOOT CEILINGS IS (infiltraion rate is greater than .40 ACH)?
  2. a) 48,000
  3. b) 40,000
  4. c) 24,000
  5. d) 6,000

 

  1. Liquid adhesive used on air filters shall have a flsh point no lower than ______ degrees F
  2. a) 230
  3. b) 275
  4. c) 250
  5. d) 325

 

  1. Unless welded or placed in a ventilated shaft, the maximnm operating pressure of gas piping in a residence shall not exceed _______ psig
  2. a) .5
  3. b) 10
  4. c) 2
  5. d) 5

 

  1. Duct lining shall be interupted _____ inches downstream of a duct heater
  2. a) 6
  3. b) 12
  4. c) 10
  5. d) 4

 

  1. TWO NATURALLY VENTILATED APPLIANCES WITH A COMBINED CAPACITY OF 130,000 BTUH ARE CONNECTED TO A COMMON B-VENT, 18′ HIGH WITH TWO 90-DEGREE ELBOWS. WHAT SIZE COMMON VENT SHOULD BE USED?
  2. a) 5″
  3. b) 7″
  4. c) 4″
  5. d) 6″

 

  1. Shield plates on studs must be a minimum ____ – inch thick
  2. a) .087
  3. b) .025
  4. c) .075
  5. d) .062

 

  1. A floor furnace shall be placed such that a drapery can be no nearer than ______ to the register of the furnace
  2. a) 18
  3. b) 12
  4. c) 6
  5. d) 8

 

  1. Corridors are generaly not permitted to be used as return ducts, however the hallway of a tenant space ______ square feet or less may be used for return air.
  2. a) 1200
  3. b) 500
  4. c) 750
  5. d) 1000

 

  1. Where holes or notches for gas tubing are less than 1.5 inches from the nearest edge of a wood stud, they must be protected by metal shields not less than ____inch thick.
  2. a) 1/8
  3. b) 1/32
  4. c) 1/16
  5. d) 1/4

 

  1. The minimum cross-sectional dimension of a combustion air duct shall be ________ inches
  2. a) 3
  3. b) 8
  4. c) 4
  5. d) 6

 

  1. The highest point of an attic must be at least ___inches in order to be used as a source for combustion air
  2. a) 28
  3. b) 30
  4. c) 24
  5. d) 36

 

  1. A gas line serving a grill may be installed a minimum ______ inches as long as it is approved and not susceptible to physical damage
  2. a) 8
  3. b) 12
  4. c) 6
  5. d) 16

 

  1. Which rooftop appliance does not require guardrail protection?
  2. a) one located 3 feet form roof edge
  3. b) one located 6 feet from roof edge
  4. c) one located 4 feet from roof edge
  5. d) one locate 8 feet from roof edge

 

  1. When obtaining combustion air from an attic, a minimum 26 gage galvanized sheet metal sleeve must be used and extended ________ inches above the joists and insulation
  2. a) 6
  3. b) 2
  4. c) 8
  5. d) 4

 

  1. A HOUSE HAS A HEAT LOSSS OF 48,000 BTUH AT 20-DEGREE OUTDOOR TEMPERATURE. WHAT IS THE HEAT LOSS AT 40-DEGREE OUTDOOR TEMPERATURE?
  2. a) 18,000 BTUH
  3. b) 124,000 BTUH
  4. c) 19,200 BTUH
  5. d) 28,800 BTUH

 

  1. Duct insulation shall have the R value printed every_________ inches
  2. a) 60
  3. b) 36
  4. c) 48
  5. d) 24

 

  1. A CONTRACTOR PAYS $750 FOR A FURNACE PLUS 7% TAX. WHAT WOULD HIS SALES PRICE BE IF HE WISHED TO MAKE 30% GROSS  PROFIT?
  2. a) $1028
  3. b) $1146
  4. c) $1043
  5. d) $975

 

  1. A 30′ X 8′ PARTITION (2 X 4 STUDS, GYPSUM ON BOTH SIDES, NO INSULATION) SEPARATES TWO ROOMS HAVING A TEMPERATURE DIFERENCE OF 20 DEGREES. WHAT IS THE WINTER HEAT LOSS THROUGH THE PARTITION?
  2. a) 3,535 BTUH
  3. b) 15,360 BTUH
  4. c) 1,500 BTUH
  5. d) 2,609 BTUH

 

  1. Which of the following gas piping materials shall not be used in exterior locations or underground
  2. a) steel
  3. b) plastic
  4. c) brass
  5. d) aluminum

 

  1. This question eliminated
  2. a) ?
  3. b) ?

 

  1. Gas piping installed underground beneath buiding may not be incased in _________.
  2. a) cement
  3. b) steel pipe
  4. c) plastic pipe
  5. d) wrought iron conduit

 

  1. Floor registers must support ______lbs consentrated load on a 2 inch disk applied at its most critical area
  2. a) 100
  3. b) 250
  4. c) 150
  5. d) 200

 

  1. AN AIR CONDITIONER HAS HIGH SUCTION AND A LOW HEAD PRESSURES.  WHAT WOULD BE A LIKELY CAUSE?
  2. a) DIRTY CONDENSER COIL
  3. b) DIRTY FILTERS
  4. c) CLOGGED METERING DEVICE
  5. d) BAD OR WEAK COMPRESSOR VALVES

 

  1. When cutting threads, a 3/4 inch pipe shall have approximately _______ treads cut
  2. a) 12
  3. b) 11
  4. c) 10
  5. d) 13

 

  1. Type I grease ducts shall have a clearance of _____ inches to combustible construction
  2. a) 18
  3. b) 3
  4. c) 6
  5. d) 12

 

  1. Grease ducts shall provide an air velocity not less than _______ feet per minute
  2. a) 400
  3. b) 750
  4. c) 250
  5. d) 500

 

  1. IF PROTECTION FROM VEHICLE IMPACT IS NOT PROVIDED, APPLIANCES INSTALLED IN PRIVATE GARAGES MUST BE INSTALLED _____ FEET ABOVE THE FLOOR.
  2. a) 7
  3. b) 6
  4. c) 8
  5. d) 5

 

  1. THE MAXIMUM HORIZONTAL LENGTH OF A SINGLE WALL CONNECTOR IS ______% OF THE HIEGHT OF THE CHIMNEY OR VENT.
  2. a) 50
  3. b) 100
  4. c) 75
  5. d) 150

 

  1. Condensate piping must no be less than _____ inch diameter
  2. a) 3/4
  3. b) 1/2
  4. c) 5/8
  5. d) 1

 

  1. The unthreaded portion of a gas piping outlet shall not extend less then ______ through a slab floor
  2. a) 1.5
  3. b) 3
  4. c) 2
  5. d) 1

 

  1. A DOUBLED UP STUD IN A LOAD BEARING WALL MAY HAVE A HOLE BORED UP TO ______% OF IT DEPTH
  2. a) 25
  3. b) 40
  4. c) 60
  5. d) 15

 

  1. A vent is not _____
  2. a) site made
  3. b) a passage way for carrying combustion products
  4. c) factory made
  5. d) listed and labeled

 

  1. A HOUSE HAS A HEATING LOAD OF 48,000 BTUH. HOW MANY CFM ARE REQUIRED FOR A ROOM WITH A HEAT LOAD OF 5200 BTUH, USING A FURNACE WITH A 1200 CFM BLOWER?
  2. a) 468
  3. b) 112
  4. c) 130
  5. d) 1112

 

  1. A home must be provided with a space heating system capable of maintaing a minimum indoor temperature of _____ degree at a point 3 feet obove the floor level on a design heating day
  2. a) 78
  3. b) 70
  4. c) 75
  5. d) 68

 

  1. An appliance that causes a positive vent pressure and produces excessive condensation in the vent is a Catagory ______ appliance
  2. a) II
  3. b) IV
  4. c) I
  5. d) III

 

  1. Pressure sensitve tapes used on flexible ducts shall be lableled as conforming to ______
  2. a) UL 181 A
  3. b) UL 181-FX
  4. c) UL 181 A-P
  5. d) UL 181 B

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Answers

 

 

  1. c  404.Tracer IFGC
  2. b   Table 403.3.1.1 IMC private dwellings, living areas
  3. c  section 406.4 IFGC (5 x test pressure)
  4. a  section 602.2 IFGC
  5. d  section 914.5 IMC
  6. b   section 401.5 IFGC
  7. c  Chapter 2 Definition of brazed
  8. d  section 304.10 IFGC ( 6 x10 = 60 sq. in.,    60/.75 = 80 sq. in.)
  9. d  Chapter 2 definitions of “regulator, medium pressure”
  10. d section 802.6 imc
  11. d section 701 imc
  12. d section 507.5.4 imc (300 X 5 ft = 1500 cfm)
  13. a section 505 ( exception includes PVC in some cases
  14. a section 706
  15. c section R403 energy code, 4 cfm per 100 sq. ft.

            1500 sq. ft. / 100 = 15

            15 x 4 =60 cfm

  1. c 404.14 Limitations. IFGC
  2. c 411.1 gas code
  3. d 409 gas code IFGC
  4. a section 303 IMC
  5. a 404 gas code
  6. d Table 305.4 IMC
  7. b definitions-listed
  8. b section 507 IMC
  9. c Chapter 2 definition “recovered refrigerant” mech code
  10. c SECTION 503 LENGTH OF VENT CONNECTOR, GAS CODE
  11. c section 506 IMC
  12. b 302 MECH CODE

28  a  TABLE 503.4 gas code

  1. a 1102. mech code
  2. b 1,000,000/140,000 = 7.143 gals

            7.143/.80 = 8.928 gals @ 80% efficiency

            8.928 x $1.25 = $11.60

  1. c Table 415.1 gas code
  2. a section 307 IMC
  3. a Manual D rectangular to round tables or use duct calculator.
  4. c 411 gas code
  5. a section 914 IMC
  6. b section R403 energy code
  7. d 403 gas code
  8. a section 504 IMC  ( 35 feet minus 5 feet for each 90 degree bend)

            Note: some older code allow for a max of 45 feet with a penalty of 10 feet   for each 90 degree bend

  1. a section 918 IMC( 80000/1000 =80,   80 x 2″ = 160 square inches)
  2. c Chapter 2, definitions gas code
  3. a See sec. 304.5.1 gas code  75000/1000 = 75

            75 x 50 = 3750 cubic feet

  1. a 303 gas code, room must be 12 times larger than the appliance.  Note this             provision is not in all codes
  2. b 305 gas code
  3. d. section 504 IMC
  4. b section 301
  5. c section 1305 IMC
  6. d .55 – .03- .03 – .15 -.10 = .24′ wc
  7. b vel – cfm/ area in sq. ft.

            12″ x 30″ = 360 sq. in.

            360 sq. in / 144 = 2.5 sq. ft.

  1. b chapter 2 definitions, gas code
  2. b CFM = BTUH / (TR x 1.1)

            bthu = 75,000 x .80 = 60,000

  1. c 306 mech code
  2. b Table 607
  3. c 404 gas code
  4. d section 504 IMC
  5. a Chapter 2 mech code “concealed location” definition

*56.  d  Table 401.5 IMC

  1. a section 403 energy code
  2. c section 504.9.1 IMC
  3. a Section 507 IMC( charcoal grille is extra heavy duty)
  4. a section 306 IMC
  5. b section 504 IMC
  6. c section 506 Grease duct enclosure
  7. c section R401 energy code
  8. d section 404 IMC (20,000 x .75 = 15,000)
  9. c 304 IMC, 140,000/2000 = 70 square inches, 7 x 10 =70 square inches(Gas Code)
  10. b section 903 IMC
  11. b Table 803.10.6 IMC
  12. b section 307
  13. a section 402 IMC (3000 X .04 = 120)
  14. a section 606 IMC
  15. a table 406.7.1 gas code
  16. b section 606 IMC
  17. c $75,000/.15 = $500,000
  18. d Tabel 803.9(1) IMC
  19. b section 507 IMC
  20. a section 909 IMC
  21. b 303 mechanical code
  22. a use friction chart or ductulator
  23. b section 403 energy code
  24. d Section 506 IMC
  25. c 8/13 = .615

            .615 x 650 = 400 op cost of new a/c

            650- 400 = $250 savings

  1. a Only R values can be added or subtracted, therefore, convert the U value to R value             1/.07= 14.28

            add R 19 + R 14.28 =  R 33.28

  1. b section 910 IMC
  2. c section 602 IMC
  3. d 303.3 exception 3, and 304.5.1 gas code
  4. d section 506 IMC  ( 24 / 12 = 2,   2 x 1/4″ = 1/2″)
  5. b section 307 IMC
  6. b section 1305 IMC
  7. d .36 x100/375 = .096 (rounded to .10) manual d
  8. d section 306 IMC
  9. a Table 308.6
  10. a Defintions, gas code
  11. a section 403 IFGC
  12. d section 403 IFGC
  13. a section 506 IMC
  14. d Table 507 IMC
  15. a Table 603.4
  16. a 70F-20F = 50F TD

            BTUH = CFM x 1.1 x TD

              = 300 x 1.1 x 50

  1. d 402 gas code
  2. b NASCLA business book or look up ADA
  3. a section 603 IMC (flexible connectors must be limited to 14 feet, not ducts)
  4. d Table C403.2.3 (2) energy code
  5. a Table 403.3.1.1 mech code

            table assumes 50 people /1000 sq ft

            Therefore 25 people would occupy 500 sq ft

            25 people x 5 cfm/person = 125 cfm

  1. a Tablle 403.3 IMC (1500/1000 = 1.5,  1.5  x 50 people = 75 people,   75 x 5 cfm = 375 cfm)
  2. a section 607 IMC
  3. a section 304 IMC
  4. c section 506 IMC
  5. a Section 603 IMC
  6. b See “longest length method” in gas code appendix
  7. d section 202 IFGC
  8. b 2012 energy code only
  9. a 405 gas code
  10. a 302 mech code
  11. b section 604 IMC
  12. c 301 gas code
  13. d section 501 IMC
  14. a 304.5.1 gas code

            15 x 20 x 8 = 24,000 cubic ft.

            24,000 / 50 = 48

  1. d section 605 IMC
  2. d section 402 IFGC
  3. a section 604 IMC
  4. d Use Table 504.3(1), IFGC, Remember to use the 15 ft. height not 20 ft.
  5. d section 305 IMC  (2009-2012 says .0575)
  6. b section 910 IMC
  7. d section 601 IMC
  8. c 404.5 gas code
  9. a section 708 IMC, also 304.6 IFGC
  10. b section 701 IMC
  11. a 404.9.1 gas code
  12. d section 304 IMC, says “within” 6 feet
  13. a section 701 IMC
  14. d 48,000 btuh/ 50 degree TD = 960 btuh heat loss per degree TD

            new TD  70F-40F = 30

            30 DTD x 960 btuh/ DTD = 28,800 btuh

  1. b section 604 IMC
  2. b $750 x .07 = $52.50

            $750.00 + 52.50 = $802.50

            100%-30% = 70% 0r .70

            802.50/.70 = $1146.42

  1. c still air surface = .68

            gypsum = .45

            air space = .91

            gypsum = .45

            still air surface = .68

            Total R = 3.17

            U = 1/3.17 = .315

            wall is 240 square feet (30 x  8)

            BTUH = area x U x td

            240 x .315 x 20 = 1512 (close enough)still air surface = .68

  1. d 403 gas code
  2. This question eliminated
  3. a 404 gas code
  4. d section 603 IMC
  5. d see any service manual
  6. c Table 403.9.2 gas code
  7. a section 506 IMC
  8. d section 506 IMC
  9. b 305 gas code
  10. c 503.10._ gas code
  11. a section 307 IMC
  12. c 404 gas code
  13. c 302 mech code
  14. a see definition “vent”, gas code
  15. c Room cfm = HF X room heat lose

            HF factor = 1200/48,000

            HF= .025

            Therefore: .025 x 5200 = 130 cfm

  1. d section 309 IMC
  2. b Gas Code definitions “vented appliance categories”
  3. a Section 603 IMC

 

           

 

 

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