Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: Systems containing more than 110 pounds must have stop valves located at the
compressor suction inlet
compressor discharge outlet
receiver inlet and outlet
All of the above
2: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a
commercial occupancy
business occupancy
mercantile occupancy
public assembly occupancy.
3: All welding done on any refrigeration system or piping covered by 522 CMR 9.00 shall be performed by a according to Section IX of the ASME code
welder qualified
licensed technician
competent welder
licensed welder
4: What type refrigerant is NOT ozone depleting?
HCFC
CFC
HFC
Halon
5: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
high pressure
low pressure
design pressure
critical pressure
6: A class B2 refrigerant is considered
non-toxic and non-flammable
non-toxic and highly flammable
toxic and non-flammable
toxic and somewhat flammable
7: 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
8: 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
you can't change refrigerants
nothing must be done
place sign, check for leaks, insulate
9: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?
Moisture indicator
Foot valve
Stop valve
Muffler
10: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested
annually
bi-annually
regularly
quarterly
11: Pressure vessels nameplate markings must be compliant with the
ASHRAE 34 Standards
CMR-588 & CMR-528
ASME Boiler and Pressure Vessel Code
All of the Above
12: What would be the classification of a church?
Industrial
Large mercantile
Institutional
Place of assembly
13: What is R-22?
Chlorodifluoromethane
HFC
Chlorofluoromethane
CCFCM
14: R-717 is
ammonia
trichloromethane
water
carbon dioxide
15: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
UL and UR
UL and UM
UM or UL
UV or UR
16: Fusible plugs must have what marked on them?
Melting temperature in F
Melting temperature in C
Opening pressure
All of the above
17: Ashrae states that the equipment on a building needs to conform to adjacent buildings classifications when within ____ feet from opening and intakes.
75
50
15
20
18: Halogenated refrigerants cannot be used with what material?
Stainless steel
Magnesium alloy
Copper
Aluminum
19: High pressure controls should be set no higher than
10% of set point
80% of set point
25% of set point
90% of set point
20: Which of the following are considered inorganic refrigerants?
R-717 and R-718
410A and R-407C
R-500 and R-502
None of the above
21: 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
22: When is the only time you can leave a service container attached to a system?
Leaking system
Recovery
Charging
Both b and c
23: Class T machine room
has no flame producing apparatus permanently installed
shall have refrigerant leak detecting systems installed inside and outside the room
shall have remote controls to stop the action of the refrigerant compressor
shall include closets used for setting equipment
24: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
the same
there is no Group B1 refrigerants
higher
lower
25: A positive displacement compressor is
a compressor in which the increase in pressure is attained by changing the internal volume of the compression chamber
is a reciprocating type compressor with 2 or more pistons
where the compressor's suction pressure and the compressor;s discharge pressure is more than 50 PSI
a compressor in which the increase in pressure is attained by changing the internal pressure of the compression chamber