Topics: ASHRAE/CMR
1: The 522 CMR 9.00 has adopted for reference ASHRAE ____
- III
- 15
- 25
- 10
2: There can be no airflow from an occupied space through a machine room unless what?
- System is high velocity
- System is ducted and sealed
- Duct is not located in the ceiling
- None of the above.
3: What must be done to refrigerant pipes before being buried?
- Certified
- Leaked checked
- Encased
- Coated
4: A machine room with a refrigerant system using ammonia shall
- be provided with a continuously operated ventilation system
- be considered a non-hazardous location in accordance with National Electrical code
- have no flame producing apparatus permanently installed and operated
- All of the above
5: Pressure vessels shall be provided with ___________in accordance with Section VIII of the ASME Boiler & Pressure Vessel Code
- over pressure protection and a rupture disc
- Pressure vessels need no type of protection as long as it is hydrostatically tested every three months
- over pressure protection
- over pressure protection as well as a temperature protection device
6: What would be the classification for Stop & Shop grocery store?
- Industrial
- Instituional
- Place of assembly
- Large mercantile
7: Group A1 refrigerants over ____ pounds in a system must discharge to the atmosphere
- 1,000
- 110
- 330
- 6.6
8: Setting a pressure relief device shall not exceed ___ of the design pressure
- 75%
- 100%
- 90%
- 80%
9: Pressure vessels with an internal volume of 3 cubic feet or less
- shall use pressure relief devices or fusible plugs
- do not need pressure relief protection
- shall use pressure relief devices
- shall use fusible plugs
10: The pressure relief device of a positive displacement compressor shall discharge in the ______________or in accordance with 9.7.8
- the vapor side of the system
- high side of the system
- the liquid side of the system
- low side of the system
11: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
12: What must be done if refrigeration lines pass through a concrete floor?
- moisture barrier
- leak checked
- insulated
- installed through a pipe casing
13: R-717 is
- carbon dioxide
- water
- ammonia
- trichloromethane
14: What pipe can not be used for refrigeration?
- N
- L
- K
- M
15: 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.
- 2.5, 3.0
- 6.6, 6.6
- 3.0, 3.5
- 2.5, 2.5
16: A declaration test is needed when the system contains more than
- 120 lbs
- 110 lbs
- 65 lbs
- 55 lbs
17: The ASHRAE Standard 34 requires what type of alarm for equipment rooms using HCFC-123?
- phosgene gas sening
- CO Sensing
- refrigerant sensing
- A group sensing
18: Methyl Chloride is a halogenated refrigerant and should not come in contact with
- aluminum
- zinc
- magnesium
- all of the above
19: Each machinery room shall contain
- a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
- high and low pressure controls
- a refrigerant detector located in an area where the refrigerant 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
20: A hotel is considered a _______ occupancy.
- mercantile
- commercial
- residential
- institutional
21: How many flammability classifications are refrigerants in?
- 7
- 5
- 3
- 2
22: Refrigerant piping crossing an open space that affords passageway in any building shall not be less than _____ feet above the floor unless piping is located against the ceiling.
- 7.25'
- 8'4"
- 9.00'
- 7.00'
23: Halogen refrigerants are corrosive to which type of metal?
- copper
- magnesium
- black iron
- stainless steel
24: Who authorizes changes to the safety codes?
- Person who pulled the permit
- Board of Boilers
- Person in charge of the facility
- Contractor who last serviced the system.
25: Which refrigerant class listed below is the most flammable?
- B-2
- A-1
- A-3
- C-3