Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: An evaporator coil located near heating coil shall have a pressure-relief device installed within ______ inches of the evaporator.
36
48
18
24
2: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants
there is no Group B1 refrigerants
the same
higher
lower
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.
6.6, 6.6
3.0, 3.5
2.5, 2.5
2.5, 3.0
4: _____ and its alloys are suitable for use with ammonia systems.
Zinc
Copper
Magnesium
Aluminum
5: The certificate of inspection
shall be posted and protected from dirt, water, and other elements
shall be posted on the compressor shell or electrical panel at the unit
shall be $20 and an additional fee of $1 for each tone above 20 tons
shall be authorized by a notarized insurance company
6: Methyl Chloride is a halogenated refrigerant and should not come in contact with
aluminum
zinc
magnesium
all of the above
7: What is a Category "D" fluid?
A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily contact
Any fluid that exceeds 150 psig and has design temperature of over 366F
A typical refrigerant used on newer air conditioning and heat pump ssytems
A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and design temperature is between -20F to 366F
8: Emergency shutdown procedures, including precautions to be observed in case of a breakdown or leak over 55 lbs of refrigerant charge, shall be displayed on a conspicuous card located as near as possible to the
boiler
evaporator
outside the machinery room
compressor
9: R-22 falls under which safety classification?
A-2
B-1
A-1
B-2
10: Pressure vessels with an internal volume of 3 cubic feet or less
shall use pressure relief devices or fusible plugs
do not need pressure relief protection
shall use fusible plugs
shall use pressure relief devices
11: 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
12: The Board of Boilers adopts by reference
Montreal Protocol Safety Code
the 1997 ANSI/ASHRAE Safety Code
MSCA Code
the MACS Pressure Vessel Code of Massachusetts
13: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.
550
100
350
50
14: Pressure vessels with an internal volume of 3 cubic feet or more
do not need pressure relief protection
shall use pressure relief devices or fusible plugs
shall use fusible plugs
shall use pressure relief devices
15: Doors communicating with outside from a mechanical room must be?
Self-closing, aligned, fire door
Self-closing, approved, fire door
Steel, approved, weather-stripped
Self-closing, wooden, fire door
16: R-410A is classified as a ____ refrigerant on the safety matrix.
A-2
B-2
B-1
A-1
17: What would be the classification for Stop & Shop grocery store?
Large mercantile
Place of assembly
Industrial
Instituional
18: A relief valve discharge capacity is rated in
temperature minus pounds of air per second divided by release rate squared
PSIG
PSIA
Pounds of air per minute.
19: The discharge relief valve is located (9.4.6)
between the compressor and oil separator
between the compressor and the stop valve
between the compressor and reciever
on top of the condensor
20: When systems are protected by a high pressure relief device, the compressor's pressure limiting device shall be set at or below ____ % of the operating pressure of the high side relief device.
110
80
100
90
21: Ammonia is under what safety classification?
B1
B3
A3
B2
22: A High-Probability System
is such that a leak of refrigerant from a failed connection will enter the occupied space
is such that a leak of refrigerant from a failed connection will enter an unoccupied space
is such that any leak will cause injury or death to anyone within a 100 square foot area
is a system highly likely to leak form a failed connection or component of such system
23: 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
public assembly occupancy.
business occupancy
mercantile occupancy
24: What must be done to refrigerant pipes before being buried ?(8.10.4)
Certified
Insulated and installed in a pipe duct (Encased)
Leak checked
Classifed
25: 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