ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: 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
  • explosion precautions must be taken
  • no flames shall be permitted

2: When this is installed on the high side of a system, it must be capable of reading 1.2 times the design pressure (ASHRAE 15 9.11.3)

  • Pressure gauge
  • Temperature gauge
  • Sight glass gauge
  • All of the above

3: 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
  • 330 lbs.
  • 550 lbs

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

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

5: 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

6: What must be done to refrigerant pipes before being buried?

  • Leaked checked
  • Certified
  • Coated
  • Encased

7: Liquid level gauges shall have _____________ with one exception being that of the liquid level gauge bull’s eye type.

  • color-coded glass to determine type of refrigerant
  • moisture indicators
  • automatic closing shut-off valves
  • All of the above

8: What section governs pressure vessels?

  • Section 1 ASHREA 15 ASME fired
  • OSHA
  • Section 8 ASHREA 15 ASME unfired
  • Section ASHREA 34

9: Direct systems using Group II refrigerants

  • shall not be used for air condition for human comfort
  • shall be allowed to be used for human comfort.
  • shall be installed per instruction of the AHJ
  • shall be installed in Class T machinery rooms

10: No open flames are allowed in the machinery room unless?

  • Approved by the authorized person
  • Approved by the installing contractor
  • Only when combustion air is provided from outside of the machinery room
  • Never can be allowed

11: What would be the classification of a prison?

  • Place of assembly
  • Industrial
  • Institutional
  • Large mercantile

12: Which refrigerant(s) is an HFC?

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

13: 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 100 persons congregate on levels above of 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 or that portion of a premise where more than 1500 persons congregate on levels above or below street level to purchase personal merchandise

14: A relief valve discharge capacity is rated in

  • temperature minus pounds of air per second divided by release rate squared
  • Pounds of air per minute.
  • PSIA
  • PSIG

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

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

16: A High-Probablity system

  • is a system highly likely to leak from a failed connection or component of such system
  • is such that any leak will cause injury or death to anyone within a 100 square foot area
  • is such that a leak of refrigerant from failed connections will enter the unoccupied space
  • is such that a leak of refrigerant from failed connections will enter the occupied space

17: What is the minimum height refrigeration piping should be placed against walls?

  • 7.25'
  • 72"
  • Ceiling height
  • 6'

18: What kind of material can't be used on the outlet of a relief valve?

  • Aluminum
  • PVC
  • Copper
  • Stainless Steel

19: A High-Probability System

  • is such that a leak of refrigerant from a failed connection will enter the occupied space
  • is a system highly likely to leak form a failed connection or component of such system
  • is such that any leak will cause injury or death to anyone within a 100 square foot area
  • is such that a leak of refrigerant from a failed connection will enter an unoccupied space

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

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

21: A class A3 refrigerant is considered

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

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

  • Notify the AHJ to let them know that the system been inspected
  • Inspector leaves a metal tag with a certification listed on it
  • 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.

23: Pressure vessels with an internal volume of 3 cubic feet or more

  • do not need pressure relief protection
  • shall use pressure relief devices or fusible plugs
  • shall use fusible plugs
  • shall use pressure relief devices

24: When can recovered refrigerants be reused?

  • They can't
  • Only when used in original owner's equipment
  • Only if used in 30 days of recovery
  • None of the above

25: Class T machine room

  • shall have refrigerant leak detecting systems installed inside and outside the room
  • shall include closets used for setting equipment
  • shall have remote controls to stop the action of the refrigerant compressor
  • has no flame producing apparatus permanently installed