Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: Can ammonia be used on domestic system?
no
yes, for systems under 10 tons
yes
no, unless there is proper ventilation system installed
2: 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
3: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?
Stop valve
Moisture indicator
Foot valve
Muffler
4: What type of pressure relief device is used on a CO2 system?
Gate valve
Fusible plug
Rupture disk
Glove valve
5: R-410A is classified as a ____ refrigerant on the safety matrix.
A-2
B-1
A-1
B-2
6: Pressure vessels with an internal volume of 3 cubic feet or more
shall use fusible plugs
shall use pressure relief devices or fusible plugs
shall use pressure relief devices
do not need pressure relief protection
7: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code
over pressure protection
Pressure vessels need no type of protection as long as it is hydrostatically tested every three months
over pressure protection and a rupture disc
over pressure protection as well as a temperature protection device
8: Which of the following are considered inorganic refrigerants?
R-717 and R-718
410A and R-407C
R-500 and R-502
None of the above
9: What would be the classification of a church?
Place of assembly
Institutional
Large mercantile
Industrial
10: What is the intention of the word “should” as used in the code?
A mandatory requirement
A recommendation or advisory guideline
A technician’s choice of how it should be done
None of the Above
11: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere
330
1,000
110
6.6
12: Which refrigerant class listed below is the most flammable?
C3
B2
A3
A2
13: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.
True
False
14: _____ and its alloys are suitable for use with ammonia systems.
Copper
Magnesium
Zinc
Aluminum
15: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
550 lbs
660 lbs
55 lbs
330 lbs.
16: A class A3 refrigerant is considered
non-toxic and non-flammable
toxic and non-flammable
non-toxic but highly flammable
toxic and somewhat flammable
17: Ammonia is under what safety classification?
B1
A3
B2
B3
18: Name an HCFC refrigerant(s):
R-22
R-123
R-11
both a & b
19: 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
20: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
True
False
21: A pressure relief should be located at least _______ from windows and doors.
30'
15'
20'
25'
22: What refrigerant has zero ozone depletion
HFC
CFC
HCFC
None of the above
23: All machine rooms must be outfitted with a detector that _______?
activates an audible alarm
activates a visual alarm
starts the ventilation system
All of the above
24: A total of all group A-2,B-2, A-3, and B-3 refrigerants shall not exceed ____ lb in the occupied areas and machinery rooms of institutional occupancies.
550
100
350
50
25: What was the main reason for enacting the no venting rule of July 1, 1992?