Topics: ASHRAE/CMR
1: Systems containing more than 110 pounds must have stop valves located at the
- compressor suction inlet
- compressor discharge outlet
- receiver inlet and outlet
- All of the above
2: Class 3 refrigerants are
- toxic
- highly flammable
- non-flammable
- non-toxic
3: What kind of material can't be used on the outlet of a relief valve?
- PVC
- Stainless Steel
- Aluminum
- Copper
4: An example of direct system is
- rooftop unit
- chiller
- absorber
- none of the above
5: The dial of a pressure gauge, when installed on the high side of a system be graduated 1.2 times the designed pressure.
- True
- False
6: What must be done to refrigerant pipes before being buried?
- Leaked checked
- Encased
- Coated
- Certified
7: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
- high pressure
- low pressure
- critical pressure
- design pressure
8: When is the space above a drop ceiling calculated as space for refrigerant limit quantities?
- When its white
- When there are sprinklers above
- When there is a space 6' or more above it
- When it's used as part of a supply or return air system
9: How many gallons of water per pound of ammonia do you need?
- 15
- 5
- 20
- 1
10: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
- True
- False
11: 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
12: No open flames are allowed in the machinery room unless?
- Approved by the installing contractor
- Never can be allowed
- Only when combustion air is provided from outside of the machinery room
- Approved by the authorized person
13: What type of pressure relief device is used on a CO2 system?
- Rupture disk
- Glove valve
- Gate valve
- Fusible plug
14: Setting a pressure relief device shall not exceed ___ of the design pressure
- 80%
- 75%
- 100%
- 90%
15: R-717 is
- ammonia
- trichloromethane
- water
- carbon dioxide
16: Each machinery room shall contain
- smoke and fire alarms as well as three means of egress and that egress must meet 528 CMR ventilation requirements
- a refrigerant detector located in an area where the refrigerant from a leak will concentrate
- high and low pressure controls
- a toxicity detector where the presence of ammonia or lithium bromide from a leak will concentrate
17: 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
18: A movie theater would be considered a
- mixed occupancy
- commercial occupancy
- public assembly occupancy
- institutional occupancy
19: What is not a requirement of a class T machine room?
- tight fitting doors
- fire hose connection to the building fire protection system
- automatic ventilation
- self-closing doors
20: 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
21: Indirect systems using Group II refrigerants
- shall be used for mechanical equipment only
- shall be used in refrigeration system in excess of 1,000 lbs
- shall have all refrigerant containing parts except piping, installed in a Class T machine room
- shall be used in refrigeration system less than 1,000 lbs
22: What would be the classification of a church?
- Industrial
- Place of assembly
- Institutional
- Large mercantile
23: Machinery rooms must be vented to ______?
- neutralizing tank
- basement
- outdoors
- unoccupied spaces
24: 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
25: What type of copper is not permitted on refrigeration systems?
- Type N
- Type K
- Type M
- Type L