Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: What refrigerant were phased out in 2004?
R-134a
R-11
R-22
R-12
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 high side
the aggregate of the high side and low side
2.5 times the design pressure
the low side
3: How much clearance do you need around the perimeter of electrical panels?
12"
18"
36"
24"
4: Relief valves are rated in
gallons of water per hour
pounds of air per minute
gallons of water per minute
pounds of air per hour
5: What is the minimum height refrigeration piping should be placed against walls?
Ceiling height
6'
7.25'
72"
6: What would be the classification of a church?
Institutional
Industrial
Place of assembly
Large mercantile
7: 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
8: A factory-sealed system containing less than 22lbs. of Group A1 refrigerant
shall be inspected by the Boiler of Inspectors bi-annually
shall have a pressure limiting device installed on the high side of the system
does not require a pressure-limiting device
shall have a pressure limiting device and a pressure relief valve installed
9: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested
annually
bi-annually
quarterly
regularly
10: Pressure vessels having an inside diameter of 6” or less shall be protected by
a pressure relief device
either a fusible plug or a pressure relief device
Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
a fusible plug
11: Fusible plugs shall not be used with pressure vessels of
15 cubic feet or more
3 cubic feet or more
15 square feet or less
3 cubic feet or less
12: Ammonia can come in contact with _______ ?
Copper
Aluminum
Brass
Copper tubing
13: Which refrigerant(s) is an HFC?
R-22
R-410A
R-502
All of the above
14: How many groups of refrigerants are there?
3
7
5
1
15: System design pressures must take into consideration, not only, pressures found during normal operation but also what?
When it's cold out
When there is a malfunction on the high side
When its warm out
All of the above
16: 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.
17: Single compound Refrigerants are classified by what two criteria?
Temperature range and hazardousness
Flammability and toxicity
Weight and color
Flammability and temperature range
18: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered
public assembly occupancy
commercial occupancy
mixed occupancy
institutional occupancy
19: Refrigerants shall be classified by
requirements for commercial, industrial, and residential occupancies
toxicity and flammability
color codes
maximum permissible quantities of each group
20: 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
21: Emergency shutdown procedures, including precautions to be observed in case of a breakdown or leak over 55 lbs of refrigerant charge, shall be displayed on a conspicuous card located as near as possible to the
evaporator
boiler
compressor
outside the machinery room
22: 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 volume of the compression chamber
is a reciprocating type compressor with 2 or more pistons
a compressor in which the increase in pressure is attained by changing the internal pressure of the compression chamber
23: R-22 falls under which safety classification?
A-1
A-2
B-2
B-1
24: NH3 is
R-508A
R-718
lithium bromide
ammonia
25: A relief valve shall be located at least ___ above grade.