ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8

  • the vapor side of the system
  • high side of the system
  • the liquid side of the system
  • low side of the system

2: What is the refrigerant chlorodifluoromethane?

  • R-22
  • R-134a
  • R-123
  • R-12

3: A professional or office building would be considered what type of occupancy?

  • commercial
  • mercantile
  • business
  • public assembly

4: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?

  • Temperature limiter device
  • T&P device
  • Relief valve
  • Circuit Breaker

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

  • 75%
  • 100%
  • 80%
  • 90%

6: Pressure vessels with an internal volume of 10 cubic feet or more

  • shall use pressure relief devices
  • shall use fusible plugs
  • shall use rupture discs or duel pressure relief valves
  • shall use pressure relief devices or fusible plugs

7: When releasing a hydrogenated hydrocarbon refrigerant to the atmosphere, ample ventilation must be provided and

  • the owner shall be informed
  • gas masks must be worn
  • no flames shall be permitted
  • explosion precautions must be taken

8: How many refrigerant classifications are there for flammability?

  • 3
  • 1
  • 2
  • 7

9: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed

  • 660 lbs
  • 55 lbs
  • 500 lbs
  • 330 lbs

10: According to ASHRAE Standard-15 9.8 Positive Displacement Compressor Protection, the pressure-relief device discharge into

  • the low-pressure side of the system
  • the high side of the system
  • the liquid receiver
  • both a and c are correct

11: A room having machinery but no flame producing apparatus permanently installed and operated is considered a

  • Class T machinery room
  • Class B machinery room
  • Class A machinery room
  • Class M machinery room

12: When air is ducted through a machine room that services occupied space, What must be done?

  • Flanged and gasketed
  • Insulated and cross broke
  • Ducted and sealed
  • Welded and seamed.

13: What would be the classification for Stop & Shop grocery store?

  • Instituional
  • Place of assembly
  • Industrial
  • Large mercantile

14: How many groups of refrigerants are there?

  • 7
  • 5
  • 3
  • 1

15: Methyl Chloride is a halogenated refrigerant and should not come in contact with

  • aluminum
  • zinc
  • magnesium
  • all of the above

16: What refrigerant is an inorganic compound?

  • R-410A
  • R-22
  • Ammonia
  • R-132A

17: The color code of a tank of ammonia is

  • silver
  • white
  • light green
  • lavender

18: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.

  • 2.5
  • 5.5
  • 3.0
  • 2.0

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

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

20: Liquid level gauges must be provided with what?

  • A relief valve
  • A low level mark
  • A red line
  • Automatic shut-offs

21: Who is permitted to access a refrigeration machine room?

  • Contractors only
  • Anyone, it's a completely safe area
  • Any employee
  • Authorized persons only

22: Which refrigerant class listed below is the most flammable?

  • C3
  • B2
  • A2
  • A3

23: Class 3 refrigerants are

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

24: All electrical work done on refrigeration systems must comply with

  • NEC and Massachusetts Modifications
  • ASHREA-15 Section 9.2.1
  • OSHA
  • Department of Energy

25: R-12. R-22, and R-40 are considered Group I refrigerants.

  • True
  • False