Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: The main purpose of a refrigerant detector in a machinery room is to
inform there is a refrigerant leak int he system
detect toxins in the air caused by a refrigerant leak
to set off an alarm when there is refrigerant present inside the room
all of the above
2: How much refrigerant can be stored in a mechanical room outside of the system?
330
100
150
200
3: Setting a pressure relief device shall not exceed ___ of the design pressure
75%
90%
100%
80%
4: 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
5: What section governs pressure vessels?
Section 8 ASHREA 15 ASME unfired
Section 1 ASHREA 15 ASME fired
Section ASHREA 34
OSHA
6: Name a CFC refrigerant(s):
R-11
R-12
R-123
both a & b
7: Ashrae states that the equipment on a building needs to conform to adjacent buildings classifications when within ____ feet from opening and intakes.
50
15
20
75
8: Pressure limiting devices are not required for systems containing less then ________ refrigerants.
6.6 lbs
22 lbs
13.9 lbs
44 lbs
9: What type of copper is not permitted on refrigeration systems?
Type M
Type L
Type N
Type K
10: Ammonia is under what safety classification?
A3
B2
B3
B1
11: What is the minimum height refrigeration piping should be placed against walls?
7.25'
72"
6'
Ceiling height
12: A Low-Probability System
is such that a leak of refrigerant from a failed connection can not enter the occupied space
is such that a leak of refrigerant from a failed connection will enter the occupied 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
13: The discharge relief valve is located (9.4.6)
on top of the condensor
between the compressor and the stop valve
between the compressor and reciever
between the compressor and oil separator
14: How far from the window does a relief valve need to be according to ASHRAE-15?
At least 20'
There is no minimum for relief valve and windows.
At least 30'
At least 40'
15: Which of the following is an inorganic refrigerant?
R-22
Ammonia
Chlorofluorocarbons
All of the above
16: Who is permitted to access a refrigeration machine room?
Contractors only
Authorized persons only
Any employee
Anyone, it's a completely safe area
17: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
66
22
25
50
18: 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.
80
100
90
110
19: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered
commercial occupancy
public assembly occupancy
institutional occupancy
mixed occupancy
20: What type refrigerant is NOT ozone depleting?
CFC
HFC
Halon
HCFC
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: A High-Probablity system
is a system highly likely to leak from a failed connection or component of such system
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 failed connections will enter the unoccupied space
is such that a leak of refrigerant from failed connections will enter the occupied space
23: 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
24: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested
bi-annually
regularly
quarterly
annually
25: 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
load-side of the contactor in
breaker panel in
first disconnect in
24 volt secondary side of the Class 2 transformer to the thermostat