Topics: All categories in the pool
1: In a properly balanced system with valves open and properly adjusted, if the suction line is warm to the touch, its because of
- not enough oil in the system
- low head pressure
- oil in evaporator
- moisture in the system
2: The amount of heat required to raise the temperature of 1 lb of water 1F is?
- 1 Kelvin
- 1 BTU
- The rate of conduction
- 1 Therm
3: Pressure relief valves shall be marked with the data from
- Section VIII Division of the ASME Boiler & Pressure Code
- Section XIII 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
4: A multi-evaporator refrigeration system uses what type of valve to maintain evaporating temperatures?
- EEV
- EPR valve
- Solenoid valve
- CPR valve
5: Volts x amps equals
- Inductance
- Impedance
- Ohms Law
- Watts
6: Electricity involves the movement of electrons in atoms
- True
- False
7: A professional or office building would be considered what type of occupancy?
- mercantile
- business
- commercial
- public assembly
8: How many opening forces operate a thermostatic expansion valve?
- 4
- 3
- 2
- 1
9: Pressure vessels of 10 cubic feet or more gross volume shall use
- at least one rupture member
- a dual pressure-relief valve if charging into the atmosphere
- at least three means of discharge and/or rupture discs
- both a and b are correct
10: R-410A can segregate in the system or chemically change its composition due to a leak.
- True
- False
11: Machinery rooms must be vented to ______?
- outdoors
- neutralizing tank
- basement
- unoccupied spaces
12: What is not a requirement of a Class T machine room?
- Automatic ventilation
- Fire hose connected to the building fire protection system.
- Self-closing doors
- Tight fitting doors
13: How many volts would you read on a 480V system phase to phase?
- 0
- 480
- 1/3 the voltage
- 277
14: What is the typical air conditioning operating pressures for R-22?
- 60 psi suction 210 psi discharge
- 25 psi suction 125 psi discharge
- 105 psi suction 340 psi discharge
- None of the above
15: 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
16: "R" represents ___ in the Ohm's law formula
- voltage
- resistance
- capacitance
- amperage
17: How are refrigerant blends classified?
- Based on best case Fractionation
- Blends don't have to be classified
- Based on worst case fractionation
- Based on the oil used
18: The rupture disc on a low-pressure chiller typically releases pressure at
- 15 psig
- 0 psig
- 10 psig
- 5 psig
19: What does an anemometer measure?
- temperature
- voltage
- amperage
- velocity
20: How many forces operate a thermostatic expansion valve?
- 1
- 4
- 3
- 2
21: Which of the following is NOT a positive displacement compressor?
- reciprocating
- scroll
- centrifugal
- screw
22: The instrument used to measure the specific gravity of absorption chiller solutions is the
- Psychrometer
- hydrometer
- anemometer
- refractometer
23: A tachometer is an instrument used to measure
- RPM
- static pressure
- speed
- air velocity
24: What is the minimum size wire you can use on a 30 amp circuit?
- 14 AWG
- 16 AWG
- 12 AWG
- 10 AWG
25: 1 HP = ____ Watts?
- 746
- 3,412
- 11,239
- 3.1416