ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested

  • quarterly
  • bi-annually
  • regularly
  • annually

2: A machine room with a refrigerant system using ammonia shall

  • be provided with a continuously operated ventilation system
  • be considered a non-hazardous location in accordance with National Electrical code
  • have no flame producing apparatus permanently installed and operated
  • 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

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

4: A pressure vessel having an inside diameter of 6” or less shall be sufficient to withstand ____times the pressure of the saturation temperature of the refrigerant or ____times the critical pressure of the refrigerant, whichever is less.

  • 3.0, 3.5
  • 2.5, 3.0
  • 6.6, 6.6
  • 2.5, 2.5

5: Evaporators within 18" of a heating coil must be equipped with a

  • low limit control
  • pressure relief device
  • zone valve
  • high limit control

6: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?

  • Foot valve
  • Moisture indicator
  • Stop valve
  • Muffler

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: Halo-carbon refrigerants cannot be used with what material?

  • Stainless Steel
  • Magnesium alloy
  • Copper
  • Aluminum

9: When a refrigerating machinery room is used, the emergency procedures shall be posted

  • on a conspicuous card located near the evaporator
  • outside the room, immediately adjacent to each door
  • on a conspicuous card located near the compressor
  • inside the room, immediately adjacent to each door

10: Ammonia can come in contact with _______ ?

  • Brass
  • Copper tubing
  • Copper
  • Aluminum

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

  • 6.6
  • 330
  • 110
  • 1,000

12: Refrigerants shall be classified by

  • toxicity and flammability
  • maximum permissible quantities of each group
  • requirements for commercial, industrial, and residential occupancies
  • color codes

13: A class B1 refrigerant is considered

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

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

  • 550 lbs
  • 55 lbs
  • 330 lbs.
  • 660 lbs

15: 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

16: Name a CFC refrigerant(s):

  • R-11
  • R-12
  • R-123
  • both a & b

17: Where are the three places that the discharge from an ammonia relief valve be piped?

  • atmosphere, tank containing water, where the A.H.J. indicates
  • underground, into drain, into mechanical room
  • to chemical neutralizing tank only
  • none of the above

18: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a

  • business occupancy
  • public assembly occupancy.
  • mercantile occupancy
  • commercial occupancy

19: Liquid level gauges must be provided with what?

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

20: What type of refrigerants are NOT flammable?

  • CHC
  • HFC
  • HCFC
  • All of the above

21: Pressure vessels having an inside diameter of 6” or less shall be protected by

  • a pressure relief device
  • a fusible plug
  • Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
  • either a fusible plug or a pressure relief device

22: R-410A is classified as a ____ refrigerant on the safety matrix.

  • B-2
  • A-2
  • A-1
  • B-1

23: A movie theater would be considered a

  • commercial occupancy
  • mixed occupancy
  • public assembly occupancy
  • institutional occupancy

24: A Low-Probability System

  • is such that any leak will cause injury or death to anyone within a 100 square foot area
  • 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 can not enter the occupied space
  • is such that a leak of refrigerant from a failed connection will enter the occupied space

25: 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