Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: Setting a pressure relief device shall not exceed ___ of the design pressure
100%
75%
80%
90%
2: Refrigerants shall be classified by
toxicity and flammability
maximum permissible quantities of each group
requirements for commercial, industrial, and residential occupancies
color codes
3: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?
Temperature limiter device
T&P device
Circuit Breaker
Relief valve
4: Defined process piping by code CMR (528)
Any piping that conveys a solid, liquid or gas that is not part of the plumbing or fire protection system
Any piping in an industrial space
Any piping in an industrial or commercial space
All of the above
5: The Board of Boilers adopts by reference
the 1997 ANSI/ASHRAE Safety Code
the MACS Pressure Vessel Code of Massachusetts
MSCA Code
Montreal Protocol Safety Code
6: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8
low side of the system
the vapor side of the system
high side of the system
the liquid side of the system
7: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
UM or UL
UL and UM
UL and UR
UV or UR
8: 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
public assembly occupancy
institutional occupancy
9: Which refrigerant class listed below is the most flammable?
B2
A3
C3
A2
10: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
80%
90%
75%
100%
11: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested
regularly
bi-annually
quarterly
annually
12: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
Nothing must be done
Make sure its compatible, notify owner, and notify AHJ.
you can never change refrigerants
Place sign, check for leaks, and insulate suction line
13: How many gallons of water per pound of ammonia do you need?
5
1
15
20
14: Halogen refrigerants are corrosive to which type of metal?
stainless steel
black iron
magnesium
copper
15: A restaurant is classified as a
commercial occupancy
mixed occupancy
large mercantile occupancy
public assembly occupancy
16: A class B2 refrigerant is considered
toxic and non-flammable
non-toxic and highly flammable
non-toxic and non-flammable
toxic and somewhat flammable
17: 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
18: Machinery rooms must be vented to ______?
unoccupied spaces
neutralizing tank
basement
outdoors
19: B3 refrigerants are considered
toxic but non-flammable
toxic and highly flammable
non-toxic but non-flammable
non-toxic but flammable
20: 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
21: When an inspection is needed, how often must it be done?
every 18 months
annually
every 24 months
every 36 months
22: Evaporators within 18" of a heating coil must be equipped with a
high limit control
pressure relief device
low limit control
zone valve
23: Halo-carbon refrigerants cannot be used with what material?
Copper
Aluminum
Stainless Steel
Magnesium alloy
24: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code
over pressure protection and a rupture disc
Pressure vessels need no type of protection as long as it is hydrostatically tested every three months
over pressure protection as well as a temperature protection device
over pressure protection
25: What is the minimum size of the discharge pipe?
Same size as the outlet of the relief valve
One pipe size larger that the inlet of the relief valve