Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: Pressure relief devices are marked with a ____________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
UV or UR
UL and UM
UL and UR
UM or UL
2: How far from the ground does a relief valve need to be?
At least 15' above grade
Not more than 3' above grade
At least 25' above grade
At least 20' above grade
3: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?
When there are sprinklers above
When there is a space 6' or more above it
When it's used as part of a supply or return air system
When its white
4: Field Inspections of refrigeration and A/C systems in Massachusetts shall be made by
District Engineering Inspectors
Commissioned Inspectors
Master licensed Technician
both a or b
5: What is the refrigerant chlorodifluoromethane?
R-134a
R-22
R-12
R-123
6: A plug containing an alloy that will melt at a specific temperature to relief pressure is a
fusible plug
rupture plug
relief plug
fusion plug
7: What does safe access mean?
A clear unobstructed path to the equipment and controls
Locked doors
OSHA approved
Well-lit exit signs
8: Which refrigerant class listed below is the most flammable?
A-1
A-3
B-2
C-3
9: 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'
10: _____ and its alloys are suitable for use with ammonia systems.
Aluminum
Copper
Magnesium
Zinc
11: A relief valve shall be located at least ___ above grade.
25'
10'
36'
15'
12: 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
13: 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
14: When a refrigeration or air conditioning system is installed
a field inspection shall be made before it is put into service
it shall be approved by the owner for proper operation.
it shall not be operated below prescribed pressures
the form of certificate shall be authorized by the Department of Pubic safety
15: The dial of a pressure gauge, when installed on the high side of a system be graduated 1.2 times the designed pressure.
True
False
16: How are refrigerant blends classified?
Blends don't have to be classified
Based on worst case fractionation
Based on best case Fractionation
Based on the oil used
17: Liquid level gauges shall have _____________ with one exception being that of the liquid level gauge bull’s eye type.
color-coded glass to determine type of refrigerant
moisture indicators
automatic closing shut-off valves
All of the above
18: A machine room with a refrigerant system using ammonia shall
be provided with a continuously operated ventilation system
be considered a non-hazardous location in accordance with National Electrical code
have no flame producing apparatus permanently installed and operated
All of the above
19: 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
20: Large Mercantile occupancy is a premise or that portion of a premise where more than ____ persons congregate on levels above or below the street level to purchase personal merchandise.
400
350
250
100
21: Liquid level gauge glasses shall have automatic closing shut off valves, except Bull's eye or reflex type.
True
False
22: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested
annually
bi-annually
quarterly
regularly
23: Where are the three places that the discharge from an ammonia relief valve be piped?
atmosphere, tank containing water, where the A.H.J. indicates
underground, into drain, into mechanical room
to chemical neutralizing tank only
none of the above
24: Most CFC's are
inert
flammable
inert but toxic
toxic
25: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a