Topics: All categories in the pool
1: "I" represents _______ in the Watt's law formula.
- reactance
- watts
- amperage
- voltage
2: 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
3: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
- True
- False
4: If a halide torch is used for leak detection, what color is the flame if it detects a leak?
- green
- red
- orange
- blue
5: Dual-pressure relief devices should be installed on
- vessels of 3 cubic feet or more
- vessels of 10 cubic feet or less
- vessels of 10 cubic feet or more
- vessels of 3 cubic feet or less
6: Most CFC's are
- toxic
- inert but toxic
- inert
- flammable
7: Pressure relief valves shall be marked with the data from
- Section XIII Division of the ASME Boiler & Pressure Code
- Section VIII Division of the ASME Boiler & Pressure Code
- Section IV Division of the ASME Boiler & Pressure Code
- Section I Division VIII of ASME Boiler & Pressure Code
8: How are safety controls wired in a circuit?
- Series
- Either series or parallel
- Series/parallel
- Parallel
9: The measurement of heat in a particular substance is
- latent heat
- enthalpy
- sensible heat
- specific heat
10: Who authorizes changes to the safety codes?
- Board of Boilers
- Contractor who last serviced the system.
- Person who pulled the permit
- Person in charge of the facility
11: Evaporators located ____inches of a heating coil shall be equipped whit a pressure relief device.
- 24
- 18
- 10
- 15
12: Instead of using a compressor, an absorption air-conditioning chiller uses which of the following as its driving force?
- Electricity
- Heat
- Air
- Oil
13: How would you know if there was a loss of crankcase pressure?
- oil level will rise
- oil will thicken
- oil will foam
- oil will thin out
14: Dew point is
- the temperature of air of 50% RH
- the temperature below which water vapor in the air will start to evaporate
- the temperature below which water vapor in the air will start to condense
- the temperature above which water vapor in the air will start to condense
15: Large Mercantile occupancy is a premise or that portion of a premise where more than ____ persons congregate on levels above or below the street level to purchase personal merchandise.
- 100
- 250
- 400
- 350
16: What must be done to refrigerant pipes before being buried?
- Coated
- Leaked checked
- Certified
- Encased
17: What type of relief valve is used on a CO2 system?
- glove disc
- gate valve
- fusible plug
- rupture disc
18: How many groups of refrigerants are there?
- 7
- 1
- 5
- 3
19: What device measures the specific gravity of a substance?
- Thermometer
- Hygrometer
- Hydrometer
- Manometer
20: A normal operating evaporator temperature of R-22 for air conditioning is typically
- 45F
- 32F
- 58F
- 55F
21: According to ASHRAE Standard-15 9.8 Positive Displacement Compressor Protection, the pressure-relief device discharge into
- the low-pressure side of the system
- the high side of the system
- the liquid receiver
- both a and c are correct
22: The 522 CMR 9.00 has adopted for reference ASHRAE ____
- 10
- 15
- III
- 25
23: Starting relays for a single phase compressors are used to remove the starting circuit from operation when the motor reaches approximately ____ percent of its speed.
- 50
- 75
- 24
- 100
24: Pressure vessel having an inside diameter exceeding 6” with an internal pressure greater than 15psig shall be marked directly on or on the nameplate the letters _______________ signifying compliance with the ASME Boiler & Pressure Vessel Code.
- “UV”
- “UL”
- “U” or “UM”
- “UM” and “UV”
25: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 660 lbs
- 500 lbs
- 330 lbs
- 55 lbs