Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: What refrigerant doesn't have to be classified?
R-134A
R-717
R-718
R-422A
2: Class 3 refrigerants are
toxic
non-toxic
highly flammable
non-flammable
3: The gauge thickness required on a CO2 tank construction is
1/16"
5/16"
1/8"
3/32"
4: Ammonia belongs to Group
B-2
B-1
A-2
A-1
5: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.
36
48
18
24
6: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested
bi-annually
regularly
annually
quarterly
7: Refrigerants shall be classified by
requirements for commercial, industrial, and residential occupancies
maximum permissible quantities of each group
toxicity and flammability
color codes
8: Liquid level gauges must be provided with what?
A red line
Automatic shut-offs
A relief valve
A low level mark
9: All welding done on any refrigeration system or piping covered by 522 CMR 9.00 shall be performed by a according to Section IX of the ASME code
competent welder
licensed welder
welder qualified
licensed technician
10: When an inspection is needed, how often must it be done?
every 18 months
every 36 months
annually
every 24 months
11: A class A3 refrigerant is considered
toxic and non-flammable
non-toxic but highly flammable
non-toxic and non-flammable
toxic and somewhat flammable
12: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
75%
100%
90%
80%
13: What is not a requirement of a class T machine room?
fire hose connection to the building fire protection system
tight fitting doors
self-closing doors
automatic ventilation
14: A hotel is considered a _______ occupancy.
commercial
mercantile
residential
institutional
15: Pressure vessels with an internal volume of 10 cubic feet or more
shall use rupture discs or duel pressure relief valves
shall use pressure relief devices or fusible plugs
shall use fusible plugs
shall use pressure relief devices
16: According to ASHRAE Standard-15 9.8 Positive Displacement Compressor Protection, the pressure-relief device discharge into
the low-pressure side of the system
the high side of the system
the liquid receiver
both a and c are correct
17: What type of copper is not permitted on refrigeration systems?
Type M
Type L
Type N
Type K
18: How many refrigerant classifications are there for flammability?
1
7
3
2
19: A pressure relief should be located at least _______ from windows and doors.
15'
20'
30'
25'
20: 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
boiler
evaporator
outside the machinery room
compressor
21: Evaporators within 18" of a heating coil must be equipped with a
low limit control
high limit control
zone valve
pressure relief device
22: Pressure limiting devices are not required for systems containing less then ________ refrigerants.
13.9 lbs
44 lbs
6.6 lbs
22 lbs
23: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a
commercial occupancy
public assembly occupancy.
business occupancy
mercantile occupancy
24: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
the outdoors
the return air ducted system
the mechanical room housing the refrigeration system