Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: R-410A is classified as a ____ refrigerant on the safety matrix.
A-1
B-1
A-2
B-2
2: R-717 is
ammonia
trichloromethane
carbon dioxide
water
3: How many flammability classifications are refrigerants in?
2
5
3
7
4: When this is installed on the high side of a system, it must be capable of reading 1.2 times the design pressure (ASHRAE 15 9.11.3)
Pressure gauge
Temperature gauge
Sight glass gauge
All of the above
5: Which occupancy can ammonia be used in?
commercial
industrial
depends on the quantity of freon
redifential
6: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants
higher
the same
there is no Group B1 refrigerants
lower
7: Liquid shall not occupy more than ____ of the volume when the temperature of the refrigerant is 90F.
90%
80%
100%
75%
8: 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
9: The Department that certifies the transportation of refrigerant is the
EPA
DOT
EPO
RSES
10: 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
11: Halogen refrigerants are corrosive to which type of metal?
copper
black iron
magnesium
stainless steel
12: What section governs pressure vessels?
OSHA
Section ASHREA 34
Section 8 ASHREA 15 ASME unfired
Section 1 ASHREA 15 ASME fired
13: A class B1 refrigerant is considered
toxic and somewhat flammable
non-toxic and non-flammable
toxic but non-flammable
non-toxic but highly flammable
14: 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
15: Which refrigerant(s) is an HFC?
R-22
R-410A
R-502
All of the above
16: Walls and doors of a machinery room shall be at least _____ hour(s) fire rated.
2
1
5
3
17: Refrigeration piping before being buried shall be
leak tested
encased in pipe duct
pressure tested
All of the above
18: Insurance companies shall forward each inspection report of all refrigeration or A/C systems to the Chief of Inspections within
2 months
1 week
14 days
30 days
19: Pipe identification labels are required when the system contains more than
65 lbs
55 lbs
110 lbs
120 lbs
20: Who approves containers for refrigerants?
E.P.A
D.O.D
D.O.T
D.O.E
21: When testing systems using non-positive displacement compressors, the entire system shall be considered for test purposes as the low side.
True
False
22: A High-Probability System
is such that a leak of refrigerant from a failed connection will enter the occupied space
is a system highly likely to leak form a failed connection or component of such system
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 a failed connection will enter an unoccupied space
23: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
there is no Group B1 refrigerants
the same
lower
higher
24: Refrigerant restricted in 2004 but used for transition for decades:
R-11
R-134A
R-22
R-123
25: Pressure vessels of 10 cubic feet or more gross volume shall use
at least one rupture member
a dual pressure-relief valve if charging into the atmosphere
at least three means of discharge and/or rupture discs