Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: What is R-22?
HFC
Chlorodifluoromethane
CCFCM
Chlorofluoromethane
2: A Category D fluid
is when the fluid handled is non flammable, nontoxic, and not damaging to human as defined in ANSI/ASME Process Piping.
is when the design pressure does not exceed 150 psi
a fluid for service piping in which the potential for personnel exposure is judged to cause harm and irreversible damage to those persons exposed to it
Both a and b are correct
3: All welding done on any refrigeration system or piping covered by 522 CMR 9.00 shall be performed by a according to Section IX of the ASME code
welder qualified
licensed welder
competent welder
licensed technician
4: How many gallons of water do you need per pound of ammonia?
10
50
1
100
5: Relief valves are rated in
pounds of air per hour
pounds of air per minute
gallons of water per minute
gallons of water per hour
6: What refrigerant doesn't have to be classified?
R-718
R-422A
R-717
R-134A
7: How many refrigerant classifications are there for toxicity?
2
3
1
5
8: 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
9: When a pressure gauge is permanently installed on a system, it must be ___ times the design pressure of the system.
1.5
1
2.2
1.2
10: R-410A is classified as a ____ refrigerant on the safety matrix.
A-2
A-1
B-2
B-1
11: A declaration test is needed when the system contains more than
110 lbs
65 lbs
55 lbs
120 lbs
12: Defined process piping by code CMR (528)
Any piping that conveys a solid, liquid or gas that is not part of the plumbing or fire protection system
Any piping in an industrial space
Any piping in an industrial or commercial space
All of the above
13: A High-Probability System
is a system highly likely to leak form a failed connection or component of such system
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 such that a leak of refrigerant from a failed connection will enter the occupied space
14: Pressure vessels with an internal volume of 10 cubic feet or more
shall use fusible plugs
shall use pressure relief devices
shall use rupture discs or duel pressure relief valves
shall use pressure relief devices or fusible plugs
15: Can you use Ammonia in industrial applications?
No, never
When mixed with R-718
Yes, Under certain condidtions
Yes, always
16: What is Trichlorotrifluoromethane?
R-12
R-113
R-13
R-11
17: 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
outside the machinery room
evaporator
compressor
18: 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.
19: When a receiver is greater than 3 cubic feet but less than 10 cubic feed, what is the minimum relief device required?
fusible plug
relief valve
rupture disc
all of the above
20: 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
5.5
2.5
21: A restaurant is classified as a
public assembly occupancy
commercial occupancy
large mercantile occupancy
mixed occupancy
22: What type of relief valve is used on a CO2 system?
fusible plug
glove disc
gate valve
rupture disc
23: What was the main reason for enacting the no venting rule of July 1, 1992?
Ozone depletion
Green house effect
Global warming potential
All of the above
24: What is an example of institutional occupancy?