Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
True
False
2: A class A3 refrigerant is considered
non-toxic and non-flammable
non-toxic but highly flammable
toxic and non-flammable
toxic and somewhat flammable
3: Who authorizes changes to the safety codes?
Person who pulled the permit
Contractor who last serviced the system.
Board of Boilers
Person in charge of the facility
4: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
330 lbs.
660 lbs
55 lbs
550 lbs
5: What type of material can't be used on the outlet of a relief valve?
Stainless steel
Magnesium alloy
PVC
Copper
6: What would be the classification of a church?
Industrial
Large mercantile
Place of assembly
Institutional
7: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?
R-12
R-113
R-22
R-11
8: What type of refrigerants are NOT flammable?
CHC
HFC
HCFC
All of the above
9: 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
10: When an inspection is needed, how often must it be done?
every 36 months
every 24 months
annually
every 18 months
11: 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.
10
25
20
15
12: What is the minimum height refrigeration piping should be placed against walls?
6'
7.25'
Ceiling height
72"
13: Pressure vessels with an internal volume of 10 cubic feet or more
shall use pressure relief devices
shall use pressure relief devices or fusible plugs
shall use rupture discs or duel pressure relief valves
shall use fusible plugs
14: The main cause of enacting the "no vending rule" of July 1st 1992 was
global warming potential
ozone depletion
both a & b
None of the above
15: How many groups of refrigerants are there?
5
7
3
1
16: What refrigerant were phased out in 2004?
R-22
R-12
R-134a
R-11
17: Which refrigerant class listed below is the most flammable?
A-3
A-1
B-2
C-3
18: Each machinery room shall contain
a refrigerant detector located in an area where the refrigerant from a leak will concentrate
high and low pressure controls
smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements
a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
19: What type of relief valve is used on low pressure centrifugal compressor systems?
Spring-loaded relief valve
Rupture disc
Purge relief
None of the above
20: When a refrigeration or air conditioning system is installed
the form of certificate shall be authorized by the Department of Pubic safety
it shall be approved by the owner for proper operation.
a field inspection shall be made before it is put into service
it shall not be operated below prescribed pressures
21: What must be done to refrigerant pipes before being buried ?(8.10.4)
Classifed
Leak checked
Certified
Insulated and installed in a pipe duct (Encased)
22: 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 technician
competent welder
licensed welder
23: 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
24: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?
T&P device
Circuit Breaker
Temperature limiter device
Relief valve
25: A declaration test is needed when the system contains more than