Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: A pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
66
25
50
22
2: pressure relief valves must discharge to the atmosphere at a location not less than 15 feet from ground level and ____ feet from any window, ventilation opening, or exits of buildings.
15
10
25
20
3: 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
24 volt secondary side of the Class 2 transformer to the thermostat
first disconnect in
breaker panel in
load-side of the contactor in
4: The Department that certifies the transportation of refrigerant is the
EPO
DOT
RSES
EPA
5: When must refrigeration system covered by the code be inspected?
Annually
Upon installation
Annually and when installed
Not required
6: R-11 belongs to Group
A-2
B-3
B-1
A-1
7: A High-Probablity system
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 from a failed connection or component of such system
is such that a leak of refrigerant from failed connections will enter the occupied space
is such that a leak of refrigerant from failed connections will enter the unoccupied space
8: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.
2.0
3.0
2.5
5.5
9: Stop valves shall not be permitted between the system and the
relief valve
service valve
bleed valve
condenser
10: The dial of a pressure gauge, when installed on the high side of a system be graduated 1.2 times the designed pressure.
True
False
11: 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
12: Pressure vessels with an internal volume of 3 cubic feet or more
shall use pressure relief devices
shall use fusible plugs
shall use pressure relief devices or fusible plugs
do not need pressure relief protection
13: Where are the three places that the discharge from an ammonia relief valve be piped?
To chemical neutralizing tank only
Underground, into drain, into mechanical room
Atmosphere, Tank containing water, where the AHJ indicates.
None of the above.
14: A premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space such as auditoriums, ballrooms, classrooms, passenger depots, restaurants, and theaters is considered a(n)
illegal occupancy
institutional occupancy
public assembly occupancy
commercial occupancy
15: Who is permitted to access a refrigeration machine room?
Authorized persons only
Anyone, it's a completely safe area
Contractors only
Any employee
16: What is a Category "D" fluid?
Any fluid that exceeds 150 psig and has design temperature of over 366F
A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily contact
A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and design temperature is between -20F to 366F
A typical refrigerant used on newer air conditioning and heat pump ssytems
17: Which refrigerant class listed below is the most flammable?
B-2
A-3
A-1
C-3
18: 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 40'
At least 20'
At least 30'
19: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered
institutional occupancy
mixed occupancy
public assembly occupancy
commercial occupancy
20: Setting a pressure relief device shall not exceed ___ of the design pressure
80%
100%
75%
90%
21: How far from the ground does a relief valve need to be?
At least 25' above grade
Not more than 3' above grade
At least 20' above grade
At least 15' above grade
22: 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.
100
80
90
110
23: How many gallons of water per pound of ammonia do you need?
1
20
15
5
24: What is not a requirement of a Class T machine room?
Fire hose connected to the building fire protection system.