ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: Single compound Refrigerants are classified by what two criteria?

  • Flammability and temperature range
  • Flammability and toxicity
  • Weight and color
  • Temperature range and hazardousness

2: What must be done if refrigeration lines pass through a concrete floor?

  • insulated
  • moisture barrier
  • installed through a pipe casing
  • leak checked

3: A restaurant is classified as a

  • large mercantile occupancy
  • public assembly occupancy
  • commercial occupancy
  • mixed occupancy

4: How many CFMs are required per square foot of commercial office occupied space

  • 15 CFM
  • 20 CFM
  • .5 CFM
  • 5 CFM

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

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

6: How far from the window does a relief valve need to be according to ASHRAE-15?

  • There is no minimum for relief valve and windows.
  • At least 40'
  • At least 30'
  • At least 20'

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

  • True
  • False

8: A positive displacement compressor is

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

9: System design pressures must take into consideration, not only, pressures found during normal operation but also what?

  • When it's cold out
  • When there is a malfunction on the high side
  • When its warm out
  • All of the above

10: What do you need to do when you install a new system?

  • Have it inspected
  • Document the superheat and subcooling reading
  • Insulate the suction line before you take a superheat reading
  • Add refrigerant

11: Large mercantile occupancy is

  • a premise or that portion of a premise where more than 200 persons congregate on levels above or below street level to purchase personal merchandise
  • a premise of that portion of a premise where more than 50 persons congregate on levels above of below street level to purchase personal merchandise.
  • a premise of that portion of a premise where more than 100 persons congregate on levels above of below street level to purchase personal merchandise.
  • a premise or that portion of a premise where more than 1500 persons congregate on levels above or below street level to purchase personal merchandise

12: Which refrigerant(s) is an HFC?

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

13: 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

14: Pipe identification labels are required when the system contains more than

  • 110 lbs
  • 55 lbs
  • 120 lbs
  • 65 lbs

15: What type refrigerant is NOT ozone depleting?

  • HFC
  • CFC
  • Halon
  • HCFC

16: The color code of a tank of ammonia is

  • light green
  • lavender
  • silver
  • white

17: Where a refrigeration or air conditioning system is installed,

  • it shall not be operated below prescribed pressuers
  • The company who installed the system must notify the fire department in the jurisdiction where installed
  • the form or certificate shall be authorized by the Department of Public Safety
  • A field inspection shall be made before it is put into service

18: All serviceable components of a refrigeration system shall be provided with

  • name plates with markings referring to pressure and temperature in accordance with ASME Boiler and Pressure Vessel Code
  • manufactures instructions on start-up procedures
  • service manuals
  • safe access

19: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.

  • 90%
  • 99%
  • 80%
  • 75%

20: High pressure controls should be set no higher than

  • 25% of set point
  • 90% of set point
  • 80% of set point
  • 10% of set point

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

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

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

  • True
  • False

23: How far from the ground does a relief valve need to be?

  • Not more than 3' above grade
  • At least 20' above grade
  • At least 25' above grade
  • At least 15' above grade

24: NH3 is

  • ammonia
  • R-718
  • R-508A
  • lithium bromide

25: 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.

  • 75
  • 55
  • 15
  • 50