Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: 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)
illegal occupancy
public assembly occupancy
commercial occupancy
institutional occupancy
2: What is R-22?
HFC
Chlorodifluoromethane
CCFCM
Chlorofluoromethane
3: What refrigerant doesn't have to be classified?
R-134A
R-422A
R-718
R-717
4: NH3 is
ammonia
R-718
R-508A
lithium bromide
5: R-718 is rated unlimited for refrigeration quantity contained in a system. Why?
Because it's cheap
Because it's a non-flammable refrigerant
Because it's water
R-718 is not rated unlimited because it's a dangerous refrigerant
6: R-22 is classified as a ____ refrigerant on the safety matrix.
A-2
B-1
B-2
A-1
7: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered
commercial occupancy
mixed occupancy
institutional occupancy
public assembly occupancy
8: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
the mechanical room housing the refrigeration system
the return air ducted system
Machinery rooms need not be vented
the outdoors
9: When a refrigerating machinery room is used, the emergency procedures shall be posted
on a conspicuous card located near the compressor
inside the room, immediately adjacent to each door
outside the room, immediately adjacent to each door
on a conspicuous card located near the evaporator
10: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
make sure it's compatible, notify owner, notify A.H.J
place sign, check for leaks, insulate
you can't change refrigerants
nothing must be done
11: 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.
10
15
20
25
12: 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.
13: What refrigerant has zero ozone depletion
HFC
CFC
HCFC
None of the above
14: copper and its alloys shall not be used in contact with _____ except as a component of bronze alloys for bearing or other non-refrigerant containing uses.
ammonia
CFC-11
Lithium bromide
HCFC-123
15: Refrigerant restricted in 2004 but used for transition for decades:
R-123
R-134A
R-11
R-22
16: 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
outside the machinery room
compressor
boiler
evaporator
17: What must be done to all doors and access points in duct work going through a mechanical room?
Must be hindged
Must be screwed shut
Must be sealed and gasketed
All of the above
18: Who is permitted to access a refrigeration machine room?
Contractors only
Anyone, it's a completely safe area
Any employee
Authorized persons only
19: _____ alloys shall not be used in contact with an halogenated refrigerants.
Copper
Nickel
Magnesium
Zinc
20: R-123 belongs to Group
A-3
B-1
B-3
B-2
21: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
660 lbs
55 lbs
550 lbs
330 lbs.
22: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
22
18
50
33
23: When can recovered refrigerants be reused?
They can't
Only when used in original owner's equipment
Only if used in 30 days of recovery
None of the above
24: All electrical work done on refrigeration systems must comply with
NEC and Massachusetts Modifications
ASHREA-15 Section 9.2.1
OSHA
Department of Energy
25: Field Inspections of refrigeration and A/C systems in Massachusetts shall be made by