Topics: All categories in the pool
1: Pressure vessels having an inside diameter of 6” or less shall be protected by
- a fusible plug
- a pressure relief device
- 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
2: Low temperature systems should have what?
- High pour point
- Low pour point
- High viscosity
- None of the above
3: When a refrigeration or air conditioning system is installed
- a field inspection shall be made before it is put into service
- the form of certificate shall be authorized by the Department of Pubic safety
- it shall not be operated below prescribed pressures
- it shall be approved by the owner for proper operation.
4: A start capacitor is wired in _____ with the start windings.
- series-parallel
- junction
- parallel
- series
5: The discharge relief valve is located (9.4.6)
- between the compressor and reciever
- on top of the condensor
- between the compressor and the stop valve
- between the compressor and oil separator
6: "E" references ____ in the Ohm's law formula
- amperage
- resistance
- voltage
- capacitance
7: 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
8: A premise where large numbers of people congregate and from which occupants can not quickly vacate the space is considered
- mixed occupancy
- institutional occupancy
- commercial occupancy
- public assembly occupancy
9: Excessive head pressure is often caused by
- leaking reed valve on the discharge side
- air cooled condenser is plugged
- thermostat set too high
- insufficient refrigerant
10: Stop valves shall not be permitted between the system and the
- relief valve
- bleed valve
- service valve
- condenser
11: 1 Watt = ______ BTU's?
- 7.216
- 4.482
- 12
- 3.412
12: The total amount of refrigerant stored in a machinery room in all containers not provided with relief valves shall not exceed
- 500 lbs
- 660 lbs
- 55 lbs
- 330 lbs
13: A crankcase heater has a supplied voltage of 100 volts and is drawing 1.4 amps. What is the resistance?
- 104 ohms
- 71 ohms
- 27 ohms
- 80 ohms
14: What is the maximum voltage range allowed on an electrical circuit?
- 15%
- 5%
- 20%
- 10%
15: A restaurant is classified as a
- large mercantile occupancy
- public assembly occupancy
- mixed occupancy
- commercial occupancy
16: Instead of using a compressor, an absorption air-conditioning chiller uses which of the following as its driving force?
- Heat
- Electricity
- Air
- Oil
17: Joints in piping for refrigeration containing parts must withstand temperatures of ___?
- 1000F
- 700F
- 800F
- 600F
18: Where would the EPR valve be located on a multiple evaporator system?
- outlet of low temperature evaporator
- inlet of the low temperature evaporator.
- outlet of the liquid line
- outlet of high temperature evaporator
19: The purpose of a receiver is
- a vessel to store refrigerant outside the system
- to increase the capacity that the system can hold
- to use a a later date
- all of the above
20: Refrigeration devices shall be equipped with a ____ to protect against unexpected pressure due to a malfunction or fire?
- Temperature limiter device
- Relief valve
- T&P device
- Circuit Breaker
21: The high side float assembly meters refrigerant into the evaporator through the
- lower chamber of the high side
- lower chamber of the low side
- upper chamber of the high side
- upper chamber of the low side
22: "I" represents ____ in the Ohm's law formula.
- voltage.
- resistance
- capacitance
- amperage
23: A 50 VA control transformer with a 25 volt control output would be rated for _________ amps.
- 1250
- 2
- 2.5
- There isn't enough information to answer.
24: When an electronic bridge is in balance the bridge output will be
- 1 volt
- .01 volts
- 0 volts
- 15 volts
25: A split-phase motor has a ______ winding and a ____ winding
- start, common
- duel-run, duel-start
- run, common
- run, start