Topics: All categories in the pool
1: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered
- institutional occupancy
- mixed occupancy
- public assembly occupancy
- commercial occupancy
2: A single pole-double throw switch uses how many wires?(excluding the ground)
- 3
- 5
- 2
- 4
3: What is used to check very low pressure?
- Hygrometer
- Velometer
- Manometer
- Hydrometer
4: Usually dry bulb temperature is
- lower than dry bulb temperature
- higher than wet bulb temperature
- not important and shall be ignored
- same as wet bulb temperature
5: Can a R22 line set be reused for a 410A system and if it can be reused, what must be done to it?
- Flush with RX-11
- Flush with R-718
- Flush with ammonia
- Flush with R-11
6: What section of ASHRAE-15 governs pressure vessels?
- OSHA
- Section 7 ASHRAE-15 ASME VIII fired
- Section 6 ASHRAE-34 ASME VIII unfired
- Section 9 ASHRAE-15 ASME VIII unfired
7: In a horizontal shell & tube condenser, the ammonia is liquefied by
- removing the latent heat of vaporization
- removing the latent heat of fusion
- passing thru the tubes from top to bottom
- water sprayed over condenser
8: What's the purpose of a megohmmeter?
- To measure low to very low resistance values
- To alternate the current in a DC circuit in order to calculate the total impedance of a circuit
- To measure very high resistances
- None of the above
9: When an inspection is needed, how often must it be done?
- every 36 months
- annually
- every 24 months
- every 18 months
10: 746 watts is equal to
- 100 hp
- Pi
- 10 hp
- 1 hp
11: How far from the ground does a relief valve need to be?
- Not more than 3' above grade
- At least 20' above grade
- At least 25' above grade
- At least 15' above grade
12: How would you know if there was a loss of crankcase pressure?
- oil will thin out
- oil will foam
- oil level will rise
- oil will thicken
13: Ammonia systems use ____ pressure to adjust oil pressure
- discharge
- liquid
- stream
- air
14: How are a compressor and condenser fan wired?
- series
- parallel
- series-parallel
- parallel-series
15: At higher altitudes, boiling temperatures
- increase
- decrease
- depends on the refrigerant
- are unaffected
16: A relief valve discharge capacity is rated in
- temperature minus pounds of air per second divided by release rate squared
- PSIA
- Pounds of air per minute.
- PSIG
17: The discharge relief valve is located (9.4.6)
- between the compressor and oil separator
- between the compressor and the stop valve
- between the compressor and reciever
- on top of the condensor
18: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?
- Relief valve
- Temperature limiter device
- T&P device
- Circuit Breaker
19: Crankcase heaters are energized
- when the compressor is off
- while the compressor is running
- to prevent compressor freeze-up
- to allow easy compressor start-up
20: B3 refrigerants are considered
- non-toxic but non-flammable
- toxic and highly flammable
- toxic but non-flammable
- non-toxic but flammable
21: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
22: Gauge pressure is
- Force of pressure above that of atmosphere
- Barometric pressure
- Atmospheric pressure
- Absolute pressrue
23: What is the amp draw of a 40 VA transformer at 24 volts
- 1.6 amps
- 1,000 amps
- 1K amps
- 106 amps
24: When can 50/50 solder be used?
- in the low side
- in the high side
- liquid and suction lines
- none of the above.
25: A “U” or “UM” marking a on a nameplate of a pressure vessels signifies compliance with Section VIII of
- the ASME Boiler and Pressure Vessel Code
- Section 11.3.1.5 ASHRAE 15 Standard
- the ANSI Standard 10.7.2
- both the ANSI Standard 10.7.2 and ASHRAE 15 Standard 11.3.1.5