Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: Which refrigerant replaced R-12?
R-407A
R-410A
R-22
R-134A
2: Institutional occupancy is
a premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space.
a premise or that portion of a premise from which, because they are disabled, debilitated, or confined, occupants cannot readily leave without the assistance of others.
a premise or that portion of a premise where people transact business, receive personal service, or purchase food and other goods.
None of the above
3: A pressure vessel having an inside diameter of 6” or less shall be sufficient to withstand ____times the pressure of the saturation temperature of the refrigerant or ____times the critical pressure of the refrigerant, whichever is less.
2.5, 3.0
6.6, 6.6
3.0, 3.5
2.5, 2.5
4: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?
Stop valve
Muffler
Moisture indicator
Foot valve
5: Fusible plugs must have what marked on them?
Melting temperature in F
Melting temperature in C
Opening pressure
All of the above
6: 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
7: The 522 CMR 9.00 has adopted for reference ASHRAE ____
III
15
25
10
8: What refrigerant doesn't have to be classified?
R-717
R-422A
R-134A
R-718
9: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
18
22
33
50
10: High pressure controls should be set no higher than
80% of set point
10% of set point
25% of set point
90% of set point
11: What must be done to refrigerant pipes before being buried?
Certified
Leaked checked
Encased
Coated
12: Fusible plugs shall not be used with pressure vessels of
15 square feet or less
3 cubic feet or more
3 cubic feet or less
15 cubic feet or more
13: Whoever owns/uses a refrigeration or air conditioning system covered by this code
must notify the Department of Public Safety prior to starting the system
shall be licensed by the Commonwealth of Massachusetts according to CMR 522
shall make application for inspections to the Chief of Inspectors
None of the above
14: Name an HCFC refrigerant(s):
R-22
R-123
R-11
both a & b
15: What would be the classification of a church?
Industrial
Large mercantile
Place of assembly
Institutional
16: 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
17: R-22 is considered a(n)
HCFCH
HCFC
HFC
CFC
18: A person holding a license as a refrigeration technician may connect or disconnect for the purpose of installation, repair, or replacement, any electrical device or control to be a part of a refrigeration or air conditioning system, from the
breaker panel in
24 volt secondary side of the Class 2 transformer to the thermostat
load-side of the contactor in
first disconnect in
19: Refrigerant piping crossing an open space that affords passageway in any building shall not be less than _____ feet above the floor unless piping is located against the ceiling.
7.25'
8'4"
9.00'
7.00'
20: When must refrigeration system covered by the code be inspected?
Upon installation
Annually
Annually and when installed
Not required
21: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
800F
600F
1000F
700F
22: R-22 falls under which safety classification?
B-1
B-2
A-2
A-1
23: What would be the classification for Stop & Shop grocery store?
Industrial
Instituional
Place of assembly
Large mercantile
24: How many refrigerant classifications are there for flammability?