Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: What would be the classification of a church?
Industrial
Large mercantile
Place of assembly
Institutional
2: Refrigerants shall be classified by
maximum permissible quantities of each group
requirements for commercial, industrial, and residential occupancies
color codes
toxicity and flammability
3: What type of pressure relief device is used on a CO2 system?
Rupture disk
Fusible plug
Gate valve
Glove valve
4: How many gallons of water do you need per pound of ammonia?
100
50
1
10
5: 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
6: A restaurant is classified as a
large mercantile occupancy
commercial occupancy
mixed occupancy
public assembly occupancy
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: What is Trichlorotrifluoromethane?
R-12
R-113
R-13
R-11
9: What kind of material can't be used on the outlet of a relief valve?
Stainless Steel
Aluminum
Copper
PVC
10: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
UL and UR
UM or UL
UV or UR
UL and UM
11: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?
phosgene gas sening
CO Sensing
refrigerant sensing
A group sensing
12: Which refrigerant replaced R-12?
R-407A
R-410A
R-22
R-134A
13: 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
15
10
25
14: Setting a pressure relief device shall not exceed ___ of the design pressure
75%
100%
90%
80%
15: When should a relief valve start to function?
Two times it's working pressure
Before the purge station discharges
At it's set pressure
10 psi before it's set pressure
16: When is the only time you can leave a service container attached to a system?
Leaking system
Recovery
Charging
Both b and c
17: What does safe access mean?
A clear unobstructed path to the equipment and controls
Well-lit exit signs
Locked doors
OSHA approved
18: What type of copper is not permitted on refrigeration systems?
Type M
Type L
Type K
Type N
19: It shall be the duty of the person in charge of the premises on which a refrigeration system containing more than ___ lbs of refrigerant is installed to provide a schematic drawing or panel giving directions for the operation of the system.
55
50
75
15
20: What would be the classification of a prison?
Industrial
Institutional
Place of assembly
Large mercantile
21: Liquid level gauges must be provided with what?
A red line
A relief valve
A low level mark
Automatic shut-offs
22: Ammonia is under what safety classification?
B3
B2
B1
A3
23: Name a CFC refrigerant(s):
R-11
R-12
R-123
both a & b
24: When a refrigerating machinery room is used, the emergency procedures shall be posted
outside the room, immediately adjacent to each door
on a conspicuous card located near the compressor
inside the room, immediately adjacent to each door
on a conspicuous card located near the evaporator
25: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed