ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Pressure limiting devices are not required for systems containing less then ________ refrigerants.

  • 22 lbs
  • 44 lbs
  • 6.6 lbs
  • 13.9 lbs

2: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.

  • 550
  • 100
  • 350
  • 50

3: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?

  • A group sensing
  • CO Sensing
  • refrigerant sensing
  • phosgene gas sening

4: Halo-carbon refrigerants cannot be used with what material?

  • Aluminum
  • Copper
  • Magnesium alloy
  • Stainless Steel

5: The dial of a pressure gauge, when installed on the high side of a system be graduated 1.2 times the designed pressure.

  • True
  • False

6: Class A refrigerants are considered

  • non-toxic
  • flammable
  • toxic
  • non-flammable

7: A Low-Probability System

  • is a system highly likely to leak form a failed connection or component of such system
  • is such that a leak of refrigerant from a failed connection can not enter the occupied space
  • is such that a leak of refrigerant from a failed connection will enter the occupied space
  • is such that any leak will cause injury or death to anyone within a 100 square foot area

8: Pressure vessels of 10 cubic feet or more gross volume shall use

  • at least one rupture member
  • a dual pressure-relief valve if charging into the atmosphere
  • at least three means of discharge and/or rupture discs
  • both a and b are correct

9: It shall be the duty of the person in charge of the premises on which a refrigeration system containing more than ___ lbs of refrigerant is installed to provide a schematic drawing or panel giving directions for the operation of the system.

  • 50
  • 75
  • 55
  • 15

10: copper and its alloys shall not be used in contact with _____ except as a component of bronze alloys for bearing or other non-refrigerant containing uses.

  • Lithium bromide
  • ammonia
  • HCFC-123
  • CFC-11

11: When is the only time you can leave a service container attached to a system?

  • Leaking system
  • Recovery
  • Charging
  • Both b and c

12: Where must a refrigeration contractor's license number be displayed?

  • Trucks, invoices, and advertising
  • Uniforms, checks, and invoices.
  • Trucks, license plates, and uniforms
  • Truck, office, every job, and on all equipment

13: How many gallons of water per pound of ammonia do you need?

  • 1
  • 5
  • 15
  • 20

14: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.

  • True
  • False

15: What is not a requirement of a Class T machine room?

  • Self-closing doors
  • Fire hose connected to the building fire protection system.
  • Tight fitting doors
  • Automatic ventilation

16: What must be done to all doors and access points in duct work going through a mechanical room?

  • Must be hindged
  • Must be screwed shut
  • Must be sealed and gasketed
  • All of the above

17: _____ and its alloys are suitable for use with ammonia systems.

  • Copper
  • Aluminum
  • Magnesium
  • Zinc

18: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?

  • Moisture indicator
  • Muffler
  • Stop valve
  • Foot valve

19: Ammonia can come in contact with _______ ?

  • Aluminum
  • Brass
  • Copper tubing
  • Copper

20: Fusible plugs shall not be used with pressure vessels of

  • 3 cubic feet or more
  • 15 square feet or less
  • 3 cubic feet or less
  • 15 cubic feet or more

21: Joints in piping for refrigeration containing parts must withstand temperatures of ___?

  • 700F
  • 600F
  • 800F
  • 1000F

22: Emergency shutdown procedures, including precautions to be observed in case of a breakdown or leak over 55 lbs of refrigerant charge, shall be displayed on a conspicuous card located as near as possible to the

  • outside the machinery room
  • compressor
  • evaporator
  • boiler

23: A class B1 refrigerant is considered

  • non-toxic but highly flammable
  • non-toxic and non-flammable
  • toxic and somewhat flammable
  • toxic but non-flammable

24: How many gallons of water do you need per pound of ammonia?

  • 50
  • 10
  • 100
  • 1

25: A person holding a license as a refrigeration technician may connect or disconnect for the purpose of installation, repair, or replacement, any electrical device or control to be a part of a refrigeration or air conditioning system, from the

  • load-side of the contactor in
  • first disconnect in
  • breaker panel in
  • 24 volt secondary side of the Class 2 transformer to the thermostat