Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: How far from the window does a relief valve need to be according to ASHRAE-15?
At least 30'
At least 40'
There is no minimum for relief valve and windows.
At least 20'
2: Pressure vessels of 10 cubic feet or more gross volume shall use
at least one rupture member
a dual pressure-relief valve if charging into the atmosphere
at least three means of discharge and/or rupture discs
both a and b are correct
3: A room having machinery but no flame producing apparatus permanently installed and operated is considered a
Class A machinery room
Class M machinery room
Class B machinery room
Class T machinery room
4: Pipe identification labels are required when the system contains more than
120 lbs
55 lbs
65 lbs
110 lbs
5: A 3-cubic foot receiver must have what type of relief valve?
fusible plug
relief valve
rupture device
none of the above
6: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
500 lbs
330 lbs
660 lbs
55 lbs
7: 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
8: A Low-Probability System
is such that a leak of refrigerant from a failed connection can not enter the occupied space
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 a failed connection will enter the occupied space
is a system highly likely to leak form a failed connection or component of such system
9: Setting a pressure relief device shall not exceed ___ of the design pressure
80%
75%
100%
90%
10: Can you use Ammonia in industrial applications?
When mixed with R-718
Yes, always
Yes, Under certain condidtions
No, never
11: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
critical pressure
low pressure
high pressure
design pressure
12: What is an egress?
An escape route
An entrance or exit
A valve put on the low side of the system to prevent frosting
A code violation
13: What refrigerant is an inorganic compound?
R-410A
Ammonia
R-132A
R-22
14: A class B2 refrigerant is considered
toxic and non-flammable
non-toxic and non-flammable
non-toxic and highly flammable
toxic and somewhat flammable
15: When an inspection is needed, how often must it be done?
annually
every 18 months
every 36 months
every 24 months
16: Class 3 refrigerants are
non-flammable
highly flammable
toxic
non-toxic
17: 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
18: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
True
False
19: What is a Category "D" fluid?
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
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
20: What is a Category "M" fluid?
Any fluid that exceeds 150 psig and has design temperatures over 366F
A fluid which is nonflammable, nontoxic, not damaging to human tissues, does not exceed 150 psig, and the designed temperature is between -20F to 366F
A toxic fluid, which can produce serious irreversible harm to persons on breathing or bodily content
A typical refrigerant used on newer air conditioning and heat pump systems
21: 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
22: What pipe can not be used for refrigeration?
M
N
K
L
23: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.
5.5
2.0
3.0
2.5
24: It shall be the duty of the person in charge of the premises on which a refrigeration system containing more than ___ lbs of refrigerant is installed to provide a schematic drawing or panel giving directions for the operation of the system.