Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: 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
2: A pressure relief should be located at least _______ from windows and doors.
30'
15'
20'
25'
3: A class A3 refrigerant is considered
non-toxic but highly flammable
toxic and non-flammable
toxic and somewhat flammable
non-toxic and non-flammable
4: Which refrigerant(s) is an HFC?
R-22
R-410A
R-502
All of the above
5: 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 ammonia
Flush with R-718
Flush with RX-11
Flush with R-11
6: Emergency shutdown procedures, including precautions to be observed in case of a breakdown or leak over 55 lbs of refrigerant charge, shall be displayed on a conspicuous card located as near as possible to the
outside the machinery room
compressor
boiler
evaporator
7: 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
8: How many flammability classifications are refrigerants in?
3
5
2
7
9: What should not (and can not) be located between a pressure imposing device and a pressure-limiting device?
Muffler
Moisture indicator
Foot valve
Stop valve
10: When systems are protected by a high pressure relief device, the compressor's pressure limiting device shall be set at or below ____ % of the operating pressure of the high side relief device.
80
100
90
110
11: Who approves containers for refrigerants?
D.O.T
D.O.D
D.O.E
E.P.A
12: How many refrigerant classifications are there for flammability?
2
1
3
7
13: Class T machine room
shall have refrigerant leak detecting systems installed inside and outside the room
has no flame producing apparatus permanently installed
shall have remote controls to stop the action of the refrigerant compressor
shall include closets used for setting equipment
14: What must be done to refrigerant pipes before being buried ?(8.10.4)
Certified
Classifed
Insulated and installed in a pipe duct (Encased)
Leak checked
15: Which of the following is an inorganic refrigerant?
R-22
Ammonia
Chlorofluorocarbons
All of the above
16: 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.
10
15
20
25
17: What was the main reason for enacting the no venting rule of July 1, 1992?
Ozone depletion
Green house effect
Global warming potential
All of the above
18: When liquid receivers are used, the liquid refrigerant shall not exceed _______percent of the volume at 90F.
90%
99%
80%
75%
19: R-22 is considered a(n)
HFC
HCFC
HCFCH
CFC
20: What is not a requirement of a Class T machine room?
Fire hose connected to the building fire protection system.
Tight fitting doors
Automatic ventilation
Self-closing doors
21: R-22 is classified as a ____ refrigerant on the safety matrix.
A-2
B-1
B-2
A-1
22: Insurance companies shall forward each inspection report of all refrigeration or A/C systems to the Chief of Inspections within
30 days
14 days
2 months
1 week
23: A professional or office building would be considered what type of occupancy?
mercantile
public assembly
commercial
business
24: All electrical work done on refrigeration systems must comply with
NEC and Massachusetts Modifications
ASHREA-15 Section 9.2.1
OSHA
Department of Energy
25: A pressure vessel having an inside diameter of 6” or less shall be sufficient to withstand ____times the pressure of the saturation temperature of the refrigerant or ____times the critical pressure of the refrigerant, whichever is less.