Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: Pipe identification labels are required when the system contains more than
120 lbs
55 lbs
65 lbs
110 lbs
2: A High-Probablity system
is such that a leak of refrigerant from failed connections will enter the occupied space
is such that any leak will cause injury or death to anyone within a 100 square foot area
is such that a leak of refrigerant from failed connections will enter the unoccupied space
is a system highly likely to leak from a failed connection or component of such system
3: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
the same
higher
lower
there is no Group B1 refrigerants
4: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?
When there are sprinklers above
When there is a space 6' or more above it
When it's used as part of a supply or return air system
When its white
5: The Department that certifies the transportation of refrigerant is the
DOT
EPO
EPA
RSES
6: What type of relief valve is used on a CO2 system?
gate valve
glove disc
rupture disc
fusible plug
7: What is R-22?
Chlorodifluoromethane
Chlorofluoromethane
HFC
CCFCM
8: What refrigerant is an inorganic compound?
R-410A
Ammonia
R-132A
R-22
9: How many CFMs are required per square foot of commercial office occupied space
15 CFM
20 CFM
.5 CFM
5 CFM
10: 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
11: A hotel is considered a _______ occupancy.
residential
commercial
institutional
mercantile
12: Trichlorofluoromethane is the name of what refrigerant?
R-11
R-12
R-113
R-502
13: The main cause of enacting the "no vending rule" of July 1st 1992 was
global warming potential
ozone depletion
both a & b
None of the above
14: How many groups of refrigerants are there?
5
1
7
3
15: Where must a refrigeration contractor's license number be displayed?
Trucks, license plates, and uniforms
Trucks, invoices, and advertising
Truck, office, every job, and on all equipment
Uniforms, checks, and invoices.
16: Pressure vessel having an inside diameter exceeding 6” with an internal pressure greater than 15psig shall be marked directly on or on the nameplate the letters _______________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
“U” or “UM”
“UV”
“UM” and “UV”
“UL”
17: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
500 lbs
330 lbs
660 lbs
55 lbs
18: _____ and its alloys are suitable for use with ammonia systems.
Zinc
Aluminum
Magnesium
Copper
19: What is the minimum height refrigeration piping should be placed against walls?
72"
6'
7.25'
Ceiling height
20: A class B1 refrigerant is considered
non-toxic and non-flammable
toxic but non-flammable
non-toxic but highly flammable
toxic and somewhat flammable
21: What pipe can not be used for refrigeration?
M
N
K
L
22: R-410A is classified as a ____ refrigerant on the safety matrix.
A-2
B-1
A-1
B-2
23: Which refrigerant replaced R-12?
R-134A
R-407A
R-410A
R-22
24: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
the return air ducted system
the outdoors
Machinery rooms need not be vented
the mechanical room housing the refrigeration system
25: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.