Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: A movie theater would be considered a
commercial occupancy
mixed occupancy
public assembly occupancy
institutional occupancy
2: 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
3: 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
4: Which of the following is an inorganic refrigerant?
R-22
Ammonia
Chlorofluorocarbons
All of the above
5: All machine rooms must be outfitted with a detector that _______?
activates an audible alarm
activates a visual alarm
starts the ventilation system
All of the above
6: What refrigerant has zero ozone depletion
HFC
CFC
HCFC
None of the above
7: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.
3.0
5.5
2.5
2.0
8: What is an example of institutional occupancy?
Football stadium
Dorms
Hospital
Shopping mall
9: How many gallons of water per pound of ammonia do you need?
20
5
1
15
10: 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
mercantile occupancy
commercial occupancy
public assembly occupancy.
11: A premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space such as auditoriums, ballrooms, classrooms, passenger depots, restaurants, and theaters is considered a(n)
commercial occupancy
illegal occupancy
institutional occupancy
public assembly occupancy
12: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?
T&P device
Circuit Breaker
Temperature limiter device
Relief valve
13: A relief valve discharge capacity is rated in
PSIA
Pounds of air per minute.
temperature minus pounds of air per second divided by release rate squared
PSIG
14: What is R-22?
HFC
Chlorofluoromethane
Chlorodifluoromethane
CCFCM
15: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?
refrigerant sensing
CO Sensing
A group sensing
phosgene gas sening
16: What type of refrigerants are NOT flammable?
CHC
HFC
HCFC
All of the above
17: Where are the three places that the discharge from an ammonia relief valve be piped?
To chemical neutralizing tank only
Underground, into drain, into mechanical room
Atmosphere, Tank containing water, where the AHJ indicates.
None of the above.
18: Ammonia shall be discharged into ____________ or a tank containing one gallon of water for every pound of ammonia.
the atmosphere
a de-pressurized recovery tank with a silver top and yellow bottom
a tank containing two pounds of a water/lithium bromide mix for every pound of ammonia
All of the above
19: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
UV or UR
UL and UR
UM or UL
UL and UM
20: 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.
50
550
100
350
21: Large vessels containing refrigerant ______________________ from using two or more pressure-relief devices in parallel to obtain the required capacity.
containing R-11, R-123 & R-717 exclusively shall not be prohibited
of Group B2 refrigerant shall be prohibited
shall be prohibited
shall not be prohibited
22: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.
True
False
23: How many refrigerant classifications are there for toxicity?
1
5
2
3
24: Single compound Refrigerants are classified by what two criteria?
Flammability and temperature range
Temperature range and hazardousness
Weight and color
Flammability and toxicity
25: What do you need to do when you install a new system?
Document the superheat and subcooling reading
Insulate the suction line before you take a superheat reading