ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: When a refrigeration or air conditioning system is installed

  • a field inspection shall be made before it is put into service
  • it shall be approved by the owner for proper operation.
  • the form of certificate shall be authorized by the Department of Pubic safety
  • it shall not be operated below prescribed pressures

2: Can ammonia be used on domestic system?

  • yes
  • no
  • no, unless there is proper ventilation system installed
  • yes, for systems under 10 tons

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

  • True
  • False

4: A class B2 refrigerant is considered

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

5: Which refrigerant(s) is an HFC?

  • R-22
  • R-410A
  • R-502
  • All of the above

6: Ammonia (NH3) is a group III refrigerant

  • True
  • False

7: What happens after your initial inspection of a pressure vessel?

  • Notify the Fire Marshal that the system has been inspected and approved
  • There is a temporary shut-down until a final inspection can be performed.
  • Inspector leaves a metal tag with a certification listed on it
  • Notify the AHJ to let them know that the system been inspected

8: R-11 belongs to Group

  • A-2
  • B-1
  • A-1
  • B-3

9: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.

  • UV or UR
  • UL and UR
  • UM or UL
  • UL and UM

10: A High-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 will enter the occupied space
  • is such that a leak of refrigerant from a failed connection will enter an unoccupied space
  • is such that any leak will cause injury or death to anyone within a 100 square foot area

11: Which occupancy can ammonia be used in?

  • depends on the quantity of freon
  • industrial
  • commercial
  • redifential

12: What does safe access mean?

  • OSHA approved
  • A clear unobstructed path to the equipment and controls
  • Well-lit exit signs
  • Locked doors

13: What type of copper is not permitted on refrigeration systems?

  • Type N
  • Type K
  • Type M
  • Type L

14: Systems containing more than 110 pounds must have stop valves located at the

  • compressor suction inlet
  • compressor discharge outlet
  • receiver inlet and outlet
  • All of the above

15: A positive displacement compressor is

  • a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber
  • where the compressor's suction pressure and the compressor;s discharge pressure is more than 50 PSI
  • a compressor in which the increase in pressure is attained by changing the internal pressure of the compression chamber
  • is a reciprocating type compressor with 2 or more pistons

16: What is the minimum size of the discharge pipe?

  • Same size as the outlet of the relief valve
  • One pipe size larger that the inlet of the relief valve
  • Depends on size of manifold
  • All of the above

17: What is a Category "M" fluid?

  • Any fluid that exceeds 150 psig and has design temperatures over 366F
  • A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily content
  • A typical refrigerant used on newer air conditioning and heat pump systems
  • A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and the designed temperature is between -20F to 366F

18: Setting a pressure relief device shall not exceed ___ of the design pressure

  • 80%
  • 75%
  • 100%
  • 90%

19: Can you use Ammonia in industrial applications?

  • Yes, always
  • Yes, Under certain condidtions
  • No, never
  • When mixed with R-718

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

  • 15
  • 5
  • 20
  • 1

21: B3 refrigerants are considered

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

22: Doors communicating with outside from a mechanical room must be?

  • Steel, approved, weather-stripped
  • Self-closing, approved, fire door
  • Self-closing, aligned, fire door
  • Self-closing, wooden, fire door

23: What must be done to refrigerant pipes before being buried ?(8.10.4)

  • Leak checked
  • Certified
  • Classifed
  • Insulated and installed in a pipe duct (Encased)

24: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.

  • the outdoors
  • Machinery rooms need not be vented
  • the return air ducted system
  • the mechanical room housing the refrigeration system

25: Ammonia is under what safety classification?

  • A3
  • B2
  • B1
  • B3