ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: When a receiver is greater than 3 cubic feet but less than 10 cubic feed, what is the minimum relief device required?

  • fusible plug
  • relief valve
  • rupture disc
  • all of the above

2: A class A3 refrigerant is considered

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

3: What does safe access mean?

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

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

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

5: Ammonia can come in contact with _______ ?

  • Copper
  • Copper tubing
  • Aluminum
  • Brass

6: A Category D fluid

  • is when the fluid handled is non flammable, nontoxic, and not damaging to human as defined in ANSI/ASME Process Piping.
  • is when the design pressure does not exceed 150 psi
  • a fluid for service piping in which the potential for personnel exposure is judged to cause harm and irreversible damage to those persons exposed to it
  • Both a and b are correct

7: Whoever owns/uses a refrigeration or air conditioning system covered by this code

  • must notify the Department of Public Safety prior to starting the system
  • shall be licensed by the Commonwealth of Massachusetts according to CMR 522
  • shall make application for inspections to the Chief of Inspectors
  • None of the above

8: 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

9: 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

10: What is not a requirement of a class T machine room?

  • automatic ventilation
  • self-closing doors
  • fire hose connection to the building fire protection system
  • tight fitting doors

11: Before you change the type of refrigerant in a refrigeration system, what three things must be done?

  • Place sign, check for leaks, and insulate suction line
  • Make sure its compatible, notify owner, and notify AHJ.
  • you can never change refrigerants
  • Nothing must be done

12: Direct systems using Group II refrigerants

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

13: 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

14: R-22 is considered a(n)

  • HFC
  • HCFCH
  • CFC
  • HCFC

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

  • Industrial
  • Large mercantile
  • Instituional
  • Place of assembly

16: Can a R22 line set be reused for a 410A system and if it can be reused, what must be done to it?

  • Flush with R-11
  • Flush with RX-11
  • Flush with ammonia
  • Flush with R-718

17: Which refrigerant(s) is an HFC?

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

18: Name an HCFC refrigerant(s):

  • R-22
  • R-123
  • R-11
  • both a & b

19: A pressure relief should be located at least _______ from windows and doors.

  • 15'
  • 20'
  • 30'
  • 25'

20: A 3-cubic foot receiver must have what type of relief valve?

  • fusible plug
  • relief valve
  • rupture device
  • none of the above

21: When should a relief valve start to function?

  • 10 psi before it's set pressure
  • Two times it's working pressure
  • Before the purge station discharges
  • At it's set pressure

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

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

23: What is the refrigerant chlorodifluoromethane?

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

24: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere

  • 6.6
  • 330
  • 110
  • 1,000

25: How many flammability classifications are refrigerants in?

  • 5
  • 2
  • 7
  • 3