Topics: All categories in the pool
1: A start capacitor in series with a start winding will
- increase running efficiency
- decrease the amp draw of the motor
- increase starting torque
- increase the amp draw of the motor
2: A hotel is considered a _______ occupancy.
- institutional
- residential
- commercial
- mercantile
3: Humidity can be sensed with
- thermometer
- pressure bellows
- bimetal
- human hair
4: One ton of refrigeration is defined as ______ btu/minute.
- 12,000
- 200
- 60
- 720,000
5: The main purpose of a refrigerant detector in a machinery room is to
- inform there is a refrigerant leak int he system
- detect toxins in the air caused by a refrigerant leak
- to set off an alarm when there is refrigerant present inside the room
- all of the above
6: The External equalizer of a TXV compensates for
- pressure drop across the condenser coil
- pressure within the evaporator
- pressure within the system
- pressure drop across the evaporator coil
7: Watt's Law indicates Volts X Amps = _________.
- Ohms
- Current
- Watts
- Resistance
8: The two float-type metering devices are the
- liquid float and the vapor float
- high-side float and the low-side float
- vapor float and the low-side float.
- liquid float and the low-side float
9: The first step in mechanical refrigeration is
- condensation
- expansion
- evaporation
- compression
10: When this is installed on the high side of a system, it must be capable of reading 1.2 times the design pressure (ASHRAE 15 9.11.3)
- Pressure gauge
- Temperature gauge
- Sight glass gauge
- All of the above
11: Brazed joints melt at temperatures above
- 1,000F
- 1,200F
- 800F
- 500F
12: Megaohm meters can detect a ground in the
- 10,000,000 ohms or higher
- up to 1,000 ohms
- up to 10,000 ohms
- up to 1,000,000 ohms
13: If a low-pressure chiller has a low-side leak, which of the following will most likely result?
- Low head pressure and high suction pressure
- Low suction pressure and low discharge pressure
- High suction pressure and high discharge pressure.
- High head pressure and low suction pressure
14: Heat cannot of itself, pass from a
- cold to a warmer body
- warm to a colder body
- state of hot energy to a state of cold energy
- None of the above
15: The gauge thickness required on a CO2 tank construction is
- 1/16"
- 5/16"
- 1/8"
- 3/32"
16: Heat is a form of
- power
- matter
- energy
- work
17: Refrigerant systems containing Group I refrigerants can be installed in or on public stairways.
- True
- False
18: The most common type of motor starter is
- across the line starter
- part winding starter
- delts-wye starter
- duel-winding starter
19: What must be done to refrigerant pipes before being buried ?(8.10.4)
- Classifed
- Leak checked
- Insulated and installed in a pipe duct (Encased)
- Certified
20: The actual expansion curve of compressor follows most nearly which one of the following
- Adiabatic
- Volume
- Pressure-Temperature
- Isothermal
21: How would you know if there was a loss of crankcase pressure?
- oil will foam
- oil will thin out
- oil level will rise
- oil will thicken
22: 1 Watt = ______ BTU's?
- 3.412
- 12
- 7.216
- 4.482
23: Electricity involves the movement of electrons in atoms
- True
- False
24: What happens after your initial inspection of a pressure vessel?
- Inspector leaves a metal tag with a certification listed on it
- Notify the AHJ to let them know that the system been inspected
- There is a temporary shut-down until a final inspection can be performed.
- Notify the Fire Marshal that the system has been inspected and approved
25: 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