Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: 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
2: 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
10,000
100,000
3: High pressure controls should be set no higher than
10% of set point
90% of set point
25% of set point
80% of set point
4: How many different groups of refrigerants are there?
7
11
3
15
5: R-22 is considered a(n)
HFC
HCFC
HCFCH
CFC
6: How many gallons of water do you need per pound of ammonia?
10
100
50
1
7: A person holding a license as a refrigeration technician may connect or disconnect for the purpose of installation, repair, or replacement, any electrical device or control to be a part of a refrigeration or air conditioning system, from the
load-side of the contactor in
breaker panel in
first disconnect in
24 volt secondary side of the Class 2 transformer to the thermostat
8: Pressure vessels with an internal volume of 3 cubic feet or less
shall use fusible plugs
shall use pressure relief devices or fusible plugs
do not need pressure relief protection
shall use pressure relief devices
9: The Board of Boilers adopts by reference
Montreal Protocol Safety Code
the MACS Pressure Vessel Code of Massachusetts
the 1997 ANSI/ASHRAE Safety Code
MSCA Code
10: Halogenated refrigerants cannot be used with what material?
Aluminum
Copper
Stainless steel
Magnesium alloy
11: Liquid level gauges shall have _____________ with one exception being that of the liquid level gauge bull’s eye type.
color-coded glass to determine type of refrigerant
moisture indicators
automatic closing shut-off valves
All of the above
12: _____ and its alloys are suitable for use with ammonia systems.
Copper
Zinc
Aluminum
Magnesium
13: Whoever owns/uses a refrigeration or air conditioning system covered by this code
must notify the Department of Public Safety prior to starting the system
shall be licensed by the Commonwealth of Massachusetts according to CMR 522
shall make application for inspections to the Chief of Inspectors
None of the above
14: Evaporators within 18" of a heating coil must be equipped with a
high limit control
low limit control
pressure relief device
zone valve
15: A hotel is considered a _______ occupancy.
commercial
institutional
residential
mercantile
16: Large Mercantile occupancy is a premise or that portion of a premise where more than ____ persons congregate on levels above or below the street level to purchase personal merchandise.
350
100
400
250
17: Ammonia can come in contact with _______ ?
Brass
Aluminum
Copper tubing
Copper
18: 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
boiler
outside the machinery room
compressor
evaporator
19: A High-Probablity system
is a system highly likely to leak from a failed connection or component of such system
is such that any leak will cause injury or death to anyone within a 100 square foot area
is such that a leak of refrigerant from failed connections will enter the unoccupied space
is such that a leak of refrigerant from failed connections will enter the occupied space
20: 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
21: NH3 is
ammonia
lithium bromide
R-508A
R-718
22: What is the refrigerant chlorodifluoromethane?
R-22
R-123
R-12
R-134a
23: What refrigerant has zero ozone depletion
HFC
CFC
HCFC
None of the above
24: Which of the following are considered inorganic refrigerants?
R-717 and R-718
410A and R-407C
R-500 and R-502
None of the above
25: 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.