Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: What would be the classification of a prison?
Large mercantile
Institutional
Industrial
Place of assembly
2: What refrigerant has zero ozone depletion
HFC
CFC
HCFC
None of the above
3: The Department that certifies the transportation of refrigerant is the
RSES
EPO
DOT
EPA
4: What refrigerant doesn't have to be classified?
R-422A
R-718
R-717
R-134A
5: 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
6: Class A refrigerants are considered
toxic
non-flammable
non-toxic
flammable
7: Stop valves shall not be permitted between the system and the
bleed valve
relief valve
service valve
condenser
8: A relief valve shall be located at least ___ above grade.
36'
10'
25'
15'
9: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
True
False
10: 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
11: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
UL and UM
UV or UR
UL and UR
UM or UL
12: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.
99%
80%
75%
90%
13: 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
both a and b are correct
14: How many gallons of water do you need per pound of ammonia?
50
10
100
1
15: A Low-Probability System
is a system highly likely to leak form a failed connection or component of such system
is such that a leak of refrigerant from a failed connection can not 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 a failed connection will enter the occupied space
16: The test pressure applied to the high side of each factory-assembled refrigerating system shall be at least equal to the design pressure of
the high side
2.5 times the design pressure
the low side
the aggregate of the high side and low side
17: How many refrigerant classifications are there for toxicity?
2
5
1
3
18: What pipe can not be used for refrigeration?
M
K
N
L
19: The 522 CMR 9.00 has adopted for reference ASHRAE ____
15
10
III
25
20: Single compound Refrigerants are classified by what two criteria?
Temperature range and hazardousness
Flammability and temperature range
Flammability and toxicity
Weight and color
21: What is an example of institutional occupancy?
Shopping mall
Hospital
Football stadium
Dorms
22: 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
23: Name a CFC refrigerant(s):
R-11
R-12
R-123
both a & b
24: Ammonia shall be discharged into ____________ or a tank containing one gallon of water for every pound of ammonia.
the atmosphere
a de-pressurized recovery tank with a silver top and yellow bottom
a tank containing two pounds of a water/lithium bromide mix for every pound of ammonia
All of the above
25: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere