Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: A restaurant is classified as a
large mercantile occupancy
commercial occupancy
public assembly occupancy
mixed occupancy
2: Where are the three places that the discharge from an ammonia relief valve be piped?
atmosphere, tank containing water, where the A.H.J. indicates
underground, into drain, into mechanical room
to chemical neutralizing tank only
none of the above
3: Trichlorofluoromethane is the name of what refrigerant?
R-11
R-113
R-502
R-12
4: Fusible plugs shall not be used with pressure vessels of
3 cubic feet or more
3 cubic feet or less
15 cubic feet or more
15 square feet or less
5: _____ alloys shall not be used in contact with an halogenated refrigerants.
Zinc
Magnesium
Nickel
Copper
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: What type refrigerant is NOT ozone depleting?
CFC
HCFC
Halon
HFC
8: Halo-carbon refrigerants cannot be used with what material?
Aluminum
Copper
Stainless Steel
Magnesium alloy
9: According to ASHRAE Standard-15 9.8 Positive Displacement Compressor Protection, the pressure-relief device discharge into
the low-pressure side of the system
the high side of the system
the liquid receiver
both a and c are correct
10: What is an example of institutional occupancy?
Hospital
Shopping mall
Football stadium
Dorms
11: How far from the window does a relief valve need to be according to ASHRAE-15?
There is no minimum for relief valve and windows.
At least 20'
At least 40'
At least 30'
12: What happens after your initial inspection of a pressure vessel?
Notify the Fire Marshal that the system has been inspected and approved
There is a temporary shut-down until a final inspection can be performed.
Inspector leaves a metal tag with a certification listed on it
Notify the AHJ to let them know that the system been inspected
13: A “U” or “UM” marking a on a nameplate of a pressure vessels signifies compliance with Section VIII of
the ASME Boiler and Pressure Vessel Code
Section 11.3.1.5 ASHRAE 15 Standard
the ANSI Standard 10.7.2
both the ANSI Standard 10.7.2 and ASHRAE 15 Standard 11.3.1.5
14: The Department that certifies the transportation of refrigerant is the
EPA
EPO
DOT
RSES
15: NH3 is
R-508A
ammonia
R-718
lithium bromide
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
the low side
2.5 times the design pressure
the aggregate of the high side and low side
17: A 3-cubic foot receiver must have what type of relief valve?
fusible plug
relief valve
rupture device
none of the above
18: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
18
50
22
33
19: Ammonia can come in contact with _______ ?
Copper
Copper tubing
Aluminum
Brass
20: When a pressure gauge is permanently installed on a system, it must be ___ times the design pressure of the system.
1.2
2.2
1.5
1
21: Ammonia is under what safety classification?
B2
B3
A3
B1
22: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
330 lbs
500 lbs
55 lbs
660 lbs
23: What must be done to all doors and access points in duct work going through a mechanical room?
Must be hindged
Must be screwed shut
Must be sealed and gasketed
All of the above
24: Name a CFC refrigerant(s):
R-11
R-12
R-123
both a & b
25: Refrigeration piping before being buried shall be