Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: Which refrigerant was still able to be vented to the atmosphere after July 1, 1992?
R-11
R-22
R-12
R-113
2: All serviceable components of a refrigeration system shall be provided with
name plates with markings referring to pressure and temperature in accordance with ASME Boiler and Pressure Vessel Code
service manuals
manufactures instructions on start-up procedures
safe access
3: Can you use Ammonia in industrial applications?
Yes, Under certain condidtions
No, never
Yes, always
When mixed with R-718
4: Ammonia (NH3) is a group III refrigerant
True
False
5: How many gallons of water per pound of ammonia do you need?
20
5
15
1
6: How many different groups of refrigerants are there?
11
7
15
3
7: 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
8: 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
9: Class 3 refrigerants are
non-flammable
highly flammable
toxic
non-toxic
10: 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
11: Fusible plugs must have what marked on them?
Melting temperature in F
Melting temperature in C
Opening pressure
All of the above
12: Before determining if a machinery room equipment is excluded from following Ashrae 15, you must determine how many pounds of refrigerant per _____ cubic feet?
100,000
1,000
100
10,000
13: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered
institutional occupancy
commercial occupancy
mixed occupancy
public assembly occupancy
14: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a
business occupancy
public assembly occupancy.
commercial occupancy
mercantile occupancy
15: Large mercantile occupancy is
a premise of that portion of a premise where more than 50 persons congregate on levels above of below street level to purchase personal merchandise.
a premise or that portion of a premise where more than 1500 persons congregate on levels above or below street level to purchase personal merchandise
a premise or that portion of a premise where more than 200 persons congregate on levels above or below street level to purchase personal merchandise
a premise of that portion of a premise where more than 100 persons congregate on levels above of below street level to purchase personal merchandise.
16: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?
A group sensing
phosgene gas sening
refrigerant sensing
CO Sensing
17: Which refrigerant(s) is an HFC?
R-22
R-410A
R-502
All of the above
18: Can a R22 line set be reused for a 410A system and if it can be reused, what must be done to it?
Flush with RX-11
Flush with R-718
Flush with R-11
Flush with ammonia
19: How are refrigerant blends classified?
Blends don't have to be classified
Based on the oil used
Based on worst case fractionation
Based on best case Fractionation
20: A relief valve shall be located at least ___ above grade.
15'
36'
25'
10'
21: Pressure vessels with an internal volume of 10 cubic feet or more
shall use fusible plugs
shall use pressure relief devices or fusible plugs
shall use rupture discs or duel pressure relief valves
shall use pressure relief devices
22: pressure relief valves must discharge to the atmosphere at a location not less than 15 feet from ground level and ____ feet from any window, ventilation opening, or exits of buildings.
15
20
10
25
23: Halo-carbon refrigerants cannot be used with what material?
Stainless Steel
Aluminum
Copper
Magnesium alloy
24: Which of the following is an inorganic refrigerant?
R-22
Ammonia
Chlorofluorocarbons
All of the above
25: Class T machine room
shall have refrigerant leak detecting systems installed inside and outside the room
shall have remote controls to stop the action of the refrigerant compressor
shall include closets used for setting equipment
has no flame producing apparatus permanently installed