Topics: ASHRAE/CMR
1: Halo-carbon refrigerants cannot be used with what material?
- Stainless Steel
- Magnesium alloy
- Copper
- Aluminum
2: 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
- first disconnect in
- breaker panel in
- 24 volt secondary side of the Class 2 transformer to the thermostat
3: Pressure vessels with an internal volume of 10 cubic feet or more
- shall use rupture discs or duel pressure relief valves
- shall use fusible plugs
- shall use pressure relief devices or fusible plugs
- shall use pressure relief devices
4: It shall be the duty of the person in charge of the premises on which a refrigeration system containing more than ___ lbs of refrigerant is installed to provide a schematic drawing or panel giving directions for the operation of the system.
- 55
- 50
- 15
- 75
5: Fusible plugs must have what marked on them?
- Melting temperature in F
- Melting temperature in C
- Opening pressure
- All of the above
6: How many refrigerant classifications are there for flammability?
- 2
- 3
- 1
- 7
7: The ____ design is the maximum pressure for which a specific part of a refrigeration system is designed.
- high pressure
- design pressure
- low pressure
- critical pressure
8: The certificate of inspection
- shall be $20 and an additional fee of $1 for each tone above 20 tons
- shall be posted and protected from dirt, water, and other elements
- shall be posted on the compressor shell or electrical panel at the unit
- shall be authorized by a notarized insurance company
9: Defined process piping by code CMR (528)
- Any piping that conveys a solid, liquid or gas that is not part of the plumbing or fire protection system
- Any piping in an industrial space
- Any piping in an industrial or commercial space
- All of the above
10: Which occupancy can ammonia be used in?
- depends on the quantity of freon
- industrial
- commercial
- redifential
11: 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.
12: Single compound Refrigerants are classified by what two criteria?
- Temperature range and hazardousness
- Flammability and temperature range
- Weight and color
- Flammability and toxicity
13: What is the refrigerant chlorodifluoromethane?
- R-123
- R-134a
- R-12
- R-22
14: A High-Probability System
- is such that a leak of refrigerant from a failed connection will enter the occupied space
- 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 a failed connection will enter an unoccupied space
- is a system highly likely to leak form a failed connection or component of such system
15: Evaporators within 18" of a heating coil must be equipped with a
- pressure relief device
- zone valve
- low limit control
- high limit control
16: Class 3 refrigerants are
- highly flammable
- non-toxic
- non-flammable
- toxic
17: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
- 10
- 24
- 15
- 18
18: B3 refrigerants are considered
- toxic and highly flammable
- non-toxic but flammable
- non-toxic but non-flammable
- toxic but non-flammable
19: Pressure vessels having an inside diameter of 6” or less shall be protected by
- a fusible plug
- Pressure vessels having an inside diameter of 6” or less need no such protection unless otherwise specified
- either a fusible plug or a pressure relief device
- a pressure relief device
20: What would be the classification for Stop & Shop grocery store?
- Place of assembly
- Large mercantile
- Industrial
- Instituional
21: 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 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
22: NH3 is
- lithium bromide
- R-718
- R-508A
- ammonia
23: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
- 800F
- 700F
- 600F
- 1000F
24: A premise or that portion of a premise where people transact business, receive personal service, or purchase foods, other goods is considered a
- mercantile occupancy
- business occupancy
- commercial occupancy
- public assembly occupancy.
25: 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