Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: Doors communicating with outside from a mechanical room must be?
Self-closing, wooden, fire door
Self-closing, approved, fire door
Steel, approved, weather-stripped
Self-closing, aligned, fire door
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: copper and its alloys shall not be used in contact with _____ except as a component of bronze alloys for bearing or other non-refrigerant containing uses.
HCFC-123
Lithium bromide
CFC-11
ammonia
4: 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
5: Before you change the type of refrigerant in a refrigeration system, what three things must be done?
Nothing must be done
Make sure its compatible, notify owner, and notify AHJ.
you can never change refrigerants
Place sign, check for leaks, and insulate suction line
6: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?
Temperature limiter device
T&P device
Circuit Breaker
Relief valve
7: Group A2 refrigerants have a ______ toxicity rating than Group B1 refrigerants.
lower
the same
there is no Group B1 refrigerants
higher
8: Refrigerants shall be classified by
toxicity and flammability
maximum permissible quantities of each group
requirements for commercial, industrial, and residential occupancies
color codes
9: 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
10: Pressure vessels having an inside diameter of 6” or less shall be protected by
Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
either a fusible plug or a pressure relief device
a fusible plug
a pressure relief device
11: Setting a pressure relief device shall not exceed ___ of the design pressure
100%
75%
80%
90%
12: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8
low side of the system
the vapor side of the system
high side of the system
the liquid side of the system
13: 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
14: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants
there is no Group B1 refrigerants
lower
the same
higher
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: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?
1,000
100,000
100
10,000
17: Name three things that must be done when changing refrigeration lubricant?
Nothing must be done
You can't change lubricants.
Place sign, check for leaks, insulate
Make sure it's compatible, notify owner, notify AHJ
18: The Board of Boilers adopts by reference
the 1997 ANSI/ASHRAE Safety Code
the MACS Pressure Vessel Code of Massachusetts
MSCA Code
Montreal Protocol Safety Code
19: 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.
20: A factory-sealed system containing less than 22lbs. of Group A1 refrigerant
shall be inspected by the Boiler of Inspectors bi-annually
shall have a pressure limiting device and a pressure relief valve installed
shall have a pressure limiting device installed on the high side of the system
does not require a pressure-limiting device
21: A relief valve discharge capacity is rated in
PSIA
temperature minus pounds of air per second divided by release rate squared
Pounds of air per minute.
PSIG
22: Halo-carbon refrigerants cannot be used with what material?
Copper
Aluminum
Stainless Steel
Magnesium alloy
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