Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
800F
1000F
700F
600F
2: 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
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: What refrigerant doesn't have to be classified?
R-134A
R-718
R-717
R-422A
5: 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
6: What is an example of institutional occupancy?
Shopping mall
Dorms
Football stadium
Hospital
7: What type of relief valve is used on a CO2 system?
fusible plug
rupture disc
glove disc
gate valve
8: When is the only time you can leave a service container attached to a system?
Leaking system
Recovery
Charging
Both b and c
9: A High-Probablity system
is a system highly likely to leak from a failed connection or component of such system
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 failed connections will enter the unoccupied space
is such that a leak of refrigerant from failed connections will enter the occupied space
10: 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
11: Ammonia (NH3) is a group III refrigerant
True
False
12: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8
high side of the system
the liquid side of the system
the vapor side of the system
low side of the system
13: What is an egress?
A valve put on the low side of the system to prevent frosting
An entrance or exit
An escape route
A code violation
14: Refrigerant piping crossing an open space that affords passageway in any building shall not be less than _____ feet above the floor unless piping is located against the ceiling.
8'4"
7.00'
7.25'
9.00'
15: What refrigerant were phased out in 2004?
R-22
R-11
R-12
R-134a
16: Which refrigerant class listed below is the most flammable?
A-1
A-3
B-2
C-3
17: When a pressure gauge is permanently installed on a system, it must be ___ times the design pressure of the system.
2.2
1
1.5
1.2
18: Pressure vessels with an internal volume of 3 cubic feet or less
shall use pressure relief devices
shall use pressure relief devices or fusible plugs
do not need pressure relief protection
shall use fusible plugs
19: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.
80%
90%
75%
99%
20: What would be the classification of a church?
Industrial
Place of assembly
Large mercantile
Institutional
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 is the refrigerant chlorodifluoromethane?
R-134a
R-22
R-12
R-123
23: What section of ASHRAE-15 governs pressure vessels?
OSHA
Section 9 ASHRAE-15 ASME VIII unfired
Section 7 ASHRAE-15 ASME VIII fired
Section 6 ASHRAE-34 ASME VIII unfired
24: Pressure vessels nameplate markings must be compliant with the
ASHRAE 34 Standards
CMR-588 & CMR-528
ASME Boiler and Pressure Vessel Code
All of the Above
25: 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