Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: A relief valve shall be located at least ___ above grade.
36'
15'
10'
25'
2: When must refrigeration system covered by the code be inspected?
Not required
Annually and when installed
Upon installation
Annually
3: A movie theater would be considered a
commercial occupancy
institutional occupancy
public assembly occupancy
mixed occupancy
4: Indirect systems using Group II refrigerants
shall have all refrigerant containing parts except piping, installed in a Class T machine room
shall be used in refrigeration system less than 1,000 lbs
shall be used in refrigeration system in excess of 1,000 lbs
shall be used for mechanical equipment only
5: A professional or office building would be considered what type of occupancy?
commercial
mercantile
public assembly
business
6: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.
99%
75%
90%
80%
7: What refrigerant doesn't have to be classified?
R-134A
R-422A
R-718
R-717
8: When a pressure gauge is permanently installed on a system, it must be ___ times the design pressure of the system.
1
1.5
2.2
1.2
9: Halo-carbon refrigerants cannot be used with what material?
Stainless Steel
Aluminum
Copper
Magnesium alloy
10: 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
11: Pressure-limiting device isn't required on a factory-sealed system containing less than ____ lbs.
50
22
33
18
12: Name three things that must be done when changing refrigeration lubricant?
Make sure it's compatible, notify owner, notify AHJ
Place sign, check for leaks, insulate
Nothing must be done
You can't change lubricants.
13: A declaration test is needed when the system contains more than
55 lbs
65 lbs
110 lbs
120 lbs
14: Pressure vessels having an inside diameter of 6” or less shall be protected by
a fusible plug
a pressure relief device
either a fusible plug or a pressure relief device
Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
15: Machinery rooms shall be vented to _____________ and utilizing mechanical ventilation.
Machinery rooms need not be vented
the outdoors
the return air ducted system
the mechanical room housing the refrigeration system
16: According to the 522 CMR Board of Boilers, refrigerant detectors, alarms, and the refrigeration mechanical room ventilating systems shall be tested
bi-annually
regularly
quarterly
annually
17: How far from the ground does a relief valve need to be?
Not more than 3' above grade
At least 25' above grade
At least 15' above grade
At least 20' above grade
18: R-410A is classified as a ____ refrigerant on the safety matrix.
B-1
B-2
A-1
A-2
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: The test pressure applied to the high side of each factory-assembled refrigerating system shall be at least equal to the design pressure of
the low side
the aggregate of the high side and low side
2.5 times the design pressure
the high side
21: A plug containing an alloy that will melt at a specific temperature to relief pressure is a
relief plug
fusible plug
rupture plug
fusion plug
22: 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
23: Joints in refrigeration piping must be _____ before being covered?
Insulated
Leak tested
Pressurized
Inspected
24: Where must a refrigeration contractor's license number be displayed?
Trucks, license plates, and uniforms
Truck, office, every job, and on all equipment
Trucks, invoices, and advertising
Uniforms, checks, and invoices.
25: System design pressures must take into consideration, not only, pressures found during normal operation but also what?