Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: All electrical work done on refrigeration systems must comply with
ASHREA-15 Section 9.2.1
NEC and Massachusetts Modifications
OSHA
Department of Energy
2: What is not a requirement of a Class T machine room?
Fire hose connected to the building fire protection system.
Self-closing doors
Tight fitting doors
Automatic ventilation
3: 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
4: _____ and its alloys are suitable for use with ammonia systems.
Copper
Aluminum
Zinc
Magnesium
5: Pressure vessels with an internal volume of 3 cubic feet or more
shall use fusible plugs
shall use pressure relief devices
shall use pressure relief devices or fusible plugs
do not need pressure relief protection
6: Name an HCFC refrigerant(s):
R-22
R-123
R-11
both a & b
7: What type of relief valve is used on low pressure centrifugal compressor systems?
Spring-loaded relief valve
Rupture disc
Purge relief
None of the above
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)
public assembly occupancy
institutional occupancy
commercial occupancy
illegal occupancy
9: Fusible plugs must have what marked on them?
Melting temperature in F
Melting temperature in C
Opening pressure
All of the above
10: Pressure vessels having an inside diameter of 6” or less shall be protected by
either a fusible plug or a pressure relief device
a fusible plug
Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
a pressure relief device
11: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.
True
False
12: Relief valves are rated in
pounds of air per hour
gallons of water per minute
gallons of water per hour
pounds of air per minute
13: Liquid level gauges shall have _____________ with one exception being that of the liquid level gauge bull’s eye type.
color-coded glass to determine type of refrigerant
moisture indicators
automatic closing shut-off valves
All of the above
14: Setting a pressure relief device shall not exceed ___ of the design pressure
90%
100%
75%
80%
15: What refrigerant has zero ozone depletion
HFC
CFC
HCFC
None of the above
16: 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
17: Direct systems using Group II refrigerants
shall not be used for air condition for human comfort
shall be installed per instruction of the AHJ
shall be installed in Class T machinery rooms
shall be allowed to be used for human comfort.
18: Doors communicating with outside from a mechanical room must be?
Steel, approved, weather-stripped
Self-closing, approved, fire door
Self-closing, aligned, fire door
Self-closing, wooden, fire door
19: R-11 belongs to Group
A-2
A-1
B-1
B-3
20: Each machinery room shall contain
a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
high and low pressure controls
a refrigerant detector located in an area where the refrigerant from a leak will concentrate
smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements
21: Joints in refrigeration piping must be _____ before being covered?
Leak tested
Pressurized
Insulated
Inspected
22: What does safe access mean?
Locked doors
OSHA approved
A clear unobstructed path to the equipment and controls
Well-lit exit signs
23: When systems are protected by a high pressure relief device, the compressor's pressure limiting device shall be set at or below ____ % of the operating pressure of the high side relief device.
90
80
100
110
24: What is an example of institutional occupancy?
Hospital
Shopping mall
Dorms
Football stadium
25: 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.