Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: Pressure vessels having an inside diameter of 6” or less shall be protected by
a fusible plug
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 pressure relief device
2: When must refrigeration system covered by the code be inspected?
Annually
Not required
Upon installation
Annually and when installed
3: Class A refrigerants are considered
toxic
non-flammable
non-toxic
flammable
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: Ammonia shall be discharged into ____________ or a tank containing one gallon of water for every pound of ammonia.
the atmosphere
a de-pressurized recovery tank with a silver top and yellow bottom
a tank containing two pounds of a water/lithium bromide mix for every pound of ammonia
All of the above
6: Trichlorofluoromethane is the name of what refrigerant?
R-502
R-113
R-11
R-12
7: A room having machinery but no flame producing apparatus permanently installed and operated is considered a
Class B machinery room
Class M machinery room
Class A machinery room
Class T machinery room
8: A “U” or “UM” marking a on a nameplate of a pressure vessels signifies compliance with Section VIII of
the ASME Boiler and Pressure Vessel Code
Section 11.3.1.5 ASHRAE 15 Standard
the ANSI Standard 10.7.2
both the ANSI Standard 10.7.2 and ASHRAE 15 Standard 11.3.1.5
9: What type of refrigerants are NOT flammable?
CHC
HFC
HCFC
All of the above
10: No open flames are allowed in the machinery room unless?
Approved by the authorized person
Approved by the installing contractor
Never can be allowed
Only when combustion air is provided from outside of the machinery room
11: How many different groups of refrigerants are there?
3
15
11
7
12: What is an example of institutional occupancy?
Football stadium
Shopping mall
Hospital
Dorms
13: Who is permitted to access a refrigeration machine room?
Any employee
Authorized persons only
Anyone, it's a completely safe area
Contractors only
14: Single compound Refrigerants are classified by what two criteria?
Weight and color
Flammability and temperature range
Temperature range and hazardousness
Flammability and toxicity
15: The gauge thickness required on a CO2 tank construction is
5/16"
1/8"
1/16"
3/32"
16: When can recovered refrigerants be reused?
They can't
Only when used in original owner's equipment
Only if used in 30 days of recovery
None of the above
17: How many refrigerant classifications are there for flammability?
3
7
1
2
18: What refrigerant is an inorganic compound?
R-22
R-410A
R-132A
Ammonia
19: What is the refrigerant dichlorodifluoromethane?
R-123
R-22
R-12
R-134A
20: Ammonia belongs to Group
A-2
B-2
B-1
A-1
21: _____ alloys shall not be used in contact with an halogenated refrigerants.
Zinc
Nickel
Magnesium
Copper
22: What must be done to refrigerant pipes before being buried?
Certified
Coated
Leaked checked
Encased
23: 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
24: 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
25: How many gallons of water per pound of ammonia do you need?