Topics: All categories in the pool
1: In an air conditioning plant which an indirect low side, water is used inside of bring: the proper sequence of operating the plan is
- start the comrpessor
- start the fan and circulating pump
- reset the expansion valve
- reset the safety valve
2: The generator shell contains the
- evaporator and the absorber
- condenser and the absorber
- condenser, the evaporator, and the generator
- condenser and the generator
3: When the compressor is below the condensor
- traps are needed on the discharge line
- traps are needed on the oil return line
- traps are needed on the suction line
- traps are not needed on this type of system
4: Can ammonia be used on domestic system?
- no
- yes
- no, unless there is proper ventilation system installed
- yes, for systems under 10 tons
5: Which is the lowest vacuum?
- 1,000 Microns
- 5 psig
- 5" hg
- 10 psia
6: What would be the classification for Stop & Shop grocery store?
- Large mercantile
- Industrial
- Place of assembly
- Instituional
7: What kind of material can't be used on the outlet of a relief valve?
- Stainless Steel
- Copper
- PVC
- Aluminum
8: If a halide torch is used for leak detection, what color is the flame if it detects a leak?
- green
- orange
- blue
- red
9: The leaving chilled water set point for comfort cooling is typically?
- 60
- 38
- 45
- 66
10: NH3 is
- R-508A
- ammonia
- lithium bromide
- R-718
11: Who authorizes changes to the safety codes?
- Person who pulled the permit
- Contractor who last serviced the system.
- Board of Boilers
- Person in charge of the facility
12: A hotel is considered a _______ occupancy.
- commercial
- mercantile
- institutional
- residential
13: When can recovered refrigerants be reused?
- They can't
- Only when used in original owner's equipment
- Only if used in 30 days of recovery
- None of the above
14: What must be done to refrigerant pipes before being buried ?(8.10.4)
- Certified
- Leak checked
- Classifed
- Insulated and installed in a pipe duct (Encased)
15: High side floats are used on centrifugal chiller systems are are considered critically charged systems.
- are obsolete.
- False
- depends on the type of refrigerant being used
- True
16: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
- 15
- 10
- 18
- 24
17: Pressure vessels with an internal volume of 3 cubic feet or more
- shall use pressure relief devices or fusible plugs
- shall use fusible plugs
- do not need pressure relief protection
- shall use pressure relief devices
18: The normal operating evaporator temperature of R-410A for air conditioning is typically
- 158F
- 32F
- 155F
- 45F
19: Liquid refrigerant flashing, or turning to vapor, in the liquid line may be due to
- liquid line that is too small
- shortage of refrigerant
- liquid line that had too high vertical lift
- All of the above
20: A multi-evaporator refrigeration system uses what type of valve to maintain evaporating temperatures?
- EPR valve
- CPR valve
- EEV
- Solenoid valve
21: How many refrigerant classifications are there for toxicity?
- 2
- 1
- 3
- 5
22: Transformers are rated in
- amps
- volt-amps
- volts
- volts-ohms
23: Which of the following is not an air velocity meter?
- Anemometer
- Hydrometer
- Anemotherm
- Velometer
24: The equivalent length of pipe in a water piping system is
- the total length of pipe plus equivalent-length of fittings
- the total length of pipe as you would measure it plus 25% for fittigns
- the total length of pipe as you would measure it
- the total length of pipe plus equivalent of fittings multiplied by 2.31
25: Ammonia shall be discharged into ____________ or a tank containing one gallon of water for every pound of ammonia.
- the atmosphere
- a de-pressurized recovery tank with a silver top and yellow bottom
- a tank containing two pounds of a water/lithium bromide mix for every pound of ammonia
- All of the above