ASHRAE/CMR code Prep Quiz

Topics: ASHRAE/CMR

Quiz Result Settings

1: A Low-Probability System

  • is such that a leak of refrigerant from a failed connection will enter the occupied space
  • is such that a leak of refrigerant from a failed connection can not 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

2: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants

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

3: How many gallons of water per pound of ammonia do you need?

  • 5
  • 1
  • 15
  • 20

4: When should a relief valve start to function?

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

5: 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

6: A relief valve discharge capacity is rated in

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

7: A High-Probability System

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

8: Systems containing more than 110 pounds must have stop valves located at the

  • compressor suction inlet
  • compressor discharge outlet
  • receiver inlet and outlet
  • All of the above

9: R-11 belongs to Group

  • B-1
  • B-3
  • A-1
  • A-2

10: A movie theater would be considered a

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

11: Name a CFC refrigerant(s):

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

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

  • 330
  • 110
  • 1,000
  • 6.6

13: A person holding a license as a refrigeration technician may connect or disconnect for the purpose of installation, repair, or replacement, any electrical device or control to be a part of a refrigeration or air conditioning system, from the

  • breaker panel in
  • 24 volt secondary side of the Class 2 transformer to the thermostat
  • first disconnect in
  • load-side of the contactor in

14: What is an egress?

  • An escape route
  • A valve put on the low side of the system to prevent frosting
  • A code violation
  • An entrance or exit

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

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

16: pressure relief valves must discharge to the atmosphere at a location not less than 15 feet from ground level and ____ feet from any window, ventilation opening, or exits of buildings.

  • 20
  • 10
  • 25
  • 15

17: How many flammability classifications are refrigerants in?

  • 5
  • 2
  • 7
  • 3

18: What is a Category "M" fluid?

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

19: What type of pressure relief device is used on a CO2 system?

  • Rupture disk
  • Fusible plug
  • Glove valve
  • Gate valve

20: A positive displacement compressor is

  • where the compressor's suction pressure and the compressor;s discharge pressure is more than 50 PSI
  • 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

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

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

22: Field Inspections of refrigeration and A/C systems in Massachusetts shall be made by

  • District Engineering Inspectors
  • Commissioned Inspectors
  • Master licensed Technician
  • both a or b

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

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

24: The dial of a pressure gauge, when installed on the high side of a system be graduated 1.2 times the designed pressure.

  • True
  • False

25: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?

  • 1,000
  • 100,000
  • 100
  • 10,000