Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: 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
2: Who approves containers for refrigerants?
D.O.D
D.O.E
E.P.A
D.O.T
3: What refrigerant were phased out in 2004?
R-12
R-134a
R-22
R-11
4: 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
5: How many refrigerant classifications are there for flammability?
1
7
3
2
6: A relief valve discharge capacity is rated in
temperature minus pounds of air per second divided by release rate squared
PSIG
PSIA
Pounds of air per minute.
7: Which refrigerant replaced R-12?
R-407A
R-22
R-410A
R-134A
8: Liquid level gauges must be provided with what?
A red line
Automatic shut-offs
A relief valve
A low level mark
9: 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.
6.6, 6.6
3.0, 3.5
2.5, 2.5
2.5, 3.0
10: 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
11: How many different groups of refrigerants are there?
11
7
15
3
12: Pressure vessel having an inside diameter exceeding 6” with an internal pressure greater than 15psig shall be marked directly on or on the nameplate the letters _______________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
“U” or “UM”
“UV”
“UM” and “UV”
“UL”
13: The gauge thickness required on a CO2 tank construction is
1/16"
5/16"
1/8"
3/32"
14: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
lower
there is no Group B1 refrigerants
higher
the same
15: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
True
False
16: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
the outdoors
the return air ducted system
the mechanical room housing the refrigeration system
Machinery rooms need not be vented
17: 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
18: What type of refrigerants are NOT flammable?
CHC
HFC
HCFC
All of the above
19: Evaporators within 18" of a heating coil must be equipped with a
low limit control
high limit control
zone valve
pressure relief device
20: How many groups of refrigerants are there?
1
3
7
5
21: Single compound Refrigerants are classified by what two criteria?
Flammability and temperature range
Temperature range and hazardousness
Weight and color
Flammability and toxicity
22: What is R-22?
Chlorofluoromethane
HFC
Chlorodifluoromethane
CCFCM
23: 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
24: 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
25: Pressure vessels having an inside diameter of 6” or less shall be protected by
Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified