Massachusetts Refrigeration Tech/Contractors practice quiz
ASHRAE/CMR code Prep Quiz
Topics: ASHRAE/CMR
1: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
700F
1000F
600F
800F
2: All electrical work done on refrigeration systems must comply with
NEC and Massachusetts Modifications
Department of Energy
OSHA
ASHREA-15 Section 9.2.1
3: A premise or that portion of a premise where large numbers of people congregate and from which occupants cannot quickly vacate the space such as auditoriums, ballrooms, classrooms, passenger depots, restaurants, and theaters is considered a(n)
public assembly occupancy
illegal occupancy
institutional occupancy
commercial occupancy
4: 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.
25
10
20
15
5: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
660 lbs
330 lbs.
55 lbs
550 lbs
6: What pipe can not be used for refrigeration?
K
M
N
L
7: 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.
6.6, 6.6
2.5, 3.0
2.5, 2.5
3.0, 3.5
8: R-12. R-22, and R-40 are considered Group I refrigerants.
True
False
9: System design pressures must take into consideration, not only, pressures found during normal operation but also what?
When it's cold out
When there is a malfunction on the high side
When its warm out
All of the above
10: What is an example of institutional occupancy?
Dorms
Hospital
Shopping mall
Football stadium
11: Each machinery room shall contain
a refrigerant detector located in an area where the refrigerant from a leak will concentrate
a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements
high and low pressure controls
12: Fusible plugs must have what marked on them?
Melting temperature in F
Melting temperature in C
Opening pressure
All of the above
13: Who authorizes changes to the safety codes?
Contractor who last serviced the system.
Person in charge of the facility
Person who pulled the permit
Board of Boilers
14: What must be done if refrigeration lines pass through a concrete floor?
insulated
installed through a pipe casing
moisture barrier
leak checked
15: What type of relief valve is used on a CO2 system?
fusible plug
rupture disc
glove disc
gate valve
16: Can you use Ammonia in industrial applications?
When mixed with R-718
No, never
Yes, Under certain condidtions
Yes, always
17: What is Trichlorotrifluoromethane?
R-113
R-13
R-11
R-12
18: A High-Probablity 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 a system highly likely to leak from a failed connection or component of such system
is such that a leak of refrigerant from failed connections will enter the occupied space
19: Pressure vessels having design pressures of 15 psig or less shall have the strength to withstand at least ______times the design pressure.
2.0
3.0
5.5
2.5
20: Group A3 refrigerants have a ______ flammability rating than Group B1 refrigerants
the same
lower
there is no Group B1 refrigerants
higher
21: What type of pressure relief device is used on a CO2 system?
Gate valve
Fusible plug
Rupture disk
Glove valve
22: A professional or office building would be considered what type of occupancy?
commercial
mercantile
business
public assembly
23: All machine rooms must be outfitted with a detector that _______?