ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: How many groups of refrigerants are there?

  • 5
  • 7
  • 3
  • 1

2: The test pressure applied to the high side of each factory-assembled refrigerating system shall be at least equal to the design pressure of

  • the low side
  • the aggregate of the high side and low side
  • the high side
  • 2.5 times the design pressure

3: What is a Category "D" fluid?

  • Any fluid that exceeds 150 psig and has design temperature of over 366F
  • A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and design temperature is between -20F to 366F
  • A typical refrigerant used on newer air conditioning and heat pump ssytems
  • A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily contact

4: A High-Probablity system

  • is such that a leak of refrigerant from failed connections will enter the occupied space
  • is such that a leak of refrigerant from failed connections will enter the unoccupied space
  • 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 from a failed connection or component of such system

5: How are refrigerant blends classified?

  • Based on the oil used
  • Based on best case Fractionation
  • Blends don't have to be classified
  • Based on worst case fractionation

6: R-717 is

  • trichloromethane
  • water
  • ammonia
  • carbon dioxide

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

  • 25'
  • 20'
  • 30'
  • 15'

8: Which of the following are considered inorganic refrigerants?

  • R-717 and R-718
  • 410A and R-407C
  • R-500 and R-502
  • None of the above

9: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.

  • there is no Group B1 refrigerants
  • higher
  • lower
  • the same

10: Each machinery room shall contain

  • a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
  • high and low pressure controls
  • a refrigerant detector located in an area where the refrigerant from a leak will concentrate
  • smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements

11: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.

  • the return air ducted system
  • the mechanical room housing the refrigeration system
  • the outdoors
  • Machinery rooms need not be vented

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

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

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

  • 99%
  • 80%
  • 90%
  • 75%

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

  • regularly
  • bi-annually
  • annually
  • quarterly

15: The discharge relief valve is located (9.4.6)

  • between the compressor and oil separator
  • between the compressor and reciever
  • on top of the condensor
  • between the compressor and the stop valve

16: What is R-22?

  • Chlorofluoromethane
  • CCFCM
  • Chlorodifluoromethane
  • HFC

17: Industrial occupancy is

  • a premise or that portion of a premise that is not open to the public, where access by authorized persons is controlled, and that is used to manufacture, process, or store goods, such as chemicals, food, ice, meat, or petroleum.
  • is a premise or that portion of a premise where large number of people congregate and from which occupants cannot quickly vacate the space.
  • a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
  • Both a and b are correct

18: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.

  • 550
  • 50
  • 100
  • 350

19: Direct systems using Group II refrigerants

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

20: Stop valves shall not be permitted between the system and the

  • bleed valve
  • service valve
  • condenser
  • relief valve

21: How many flammability classifications are refrigerants in?

  • 7
  • 3
  • 5
  • 2

22: What is not a requirement of a Class T machine room?

  • Fire hose connected to the building fire protection system.
  • Self-closing doors
  • Tight fitting doors
  • Automatic ventilation

23: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.

  • 22
  • 50
  • 18
  • 33

24: Pressure vessels with an internal volume of 3 cubic feet or less

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

25: Refrigerants shall be classified by

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