Title: Motor Installation and Lighting Test
Course: Industrial Wiring (IC 104-IC 104) > Section: Assessments

Q: A 150 horsepower synchronous motor is going to be connected to a 2300 volt 3-phase system, what is the full-load current of this motor? It will be operating at a 90 percent power factor.
A: 33A

Q: A 500 volt DC source is connected to a 60 horsepower motor, what is the full-load current?
A: 99A

Q: Conductor sizing of a single motor is determined by taking. . .
- 115 percent of motor full-load current from the NEC table
- 125 percent of motor full-load current from the NEC table
- 115 percent of the nameplate current rating
- 125 percent of the nameplate current rating
A: 115 percent of motor full-load current from the NEC table

Q: The ________ lamp has, by far, the shortest life expectancy.
- incandescent
- metal halide
- high-pressure sodium
- low-pressure sodium
A: incandescent

Q: The Edison-type lamp uses a(n) _________ enclosed in a glass bulb to produce the light.
- halogen rod
- tungsten filament
- inert gas
- wire filament
A: halogen rod

Q: The full-load current rating should be increased by 125 percent when the motor's nameplate is marked with a temperature rise of 40 degrees C.
- True
- False
A: True

Q: The light sources (lamps) can be placed in three categories: ___________, fluorescent, and high-intensity discharge (HID).
- LED
- arc-generated
- halogen
- incandescent
A: LED

Q: The temperature rating of the terminators has no effect on selecting which column the conductor's ampacity rating is taken from.
- True
- False
A: False

Q: There are four styles of HID lamps: ___________, metal halide, high-pressure sodium, and low-pressure sodium.
- halogen
- lithium
- mercury
- tungsten
A: halogen

Q: What is the full-load current for a 1/2 horsepower DC motor connected to 120 volts?
A: 5.4A

Q: What is the full-load current for a 7 ½ horsepower 3-phase motor connected to 240 volts?
A: 22A

Q: What is the full-load current for a 5 horsepower single-phase motor connected to 208 volts?
A: 30.8A

Q: What is the full-load current for a 40 horsepower 3-phase motor that is running at 480 volts?
A: 52A

Q: What is the overload size for a 75 horsepower 3-phase induction motor connected to 230 volts with a 190 Amp current rating and 1.2 service factor marked on the nameplate?
A: 237.5A

Q: When considering power control for lighting, a _________ may be adequate if the load is small and the control requirements are minimal.
- toggle switch
- contactor
- pressure switch
- motor starer
A: toggle switch

Q: When determining the motor overload size,what should be used?
- conductor size to the motor
- current values form the NEC tables
- current rating from the motor nameplate
A: conductor size to the motor

Q: Which of the following sites has the highest recommended amount of light necessary?
- roadway
- storage
- parking
- pedestrian
A: roadway

Q: With a circuit rated at 100 Amps or less, or 1 AWG or smaller conductor, and the termination temperature rating is not known. Which column when selecting the ampacity of the conductor should be used?
- 60 degree C (column)
- 75 degree C (column)
- 90 degree C (column)
- use the column with the correct insulation rating
A: 60 degree C (column)

Q: With THHW copper wire and the termination temperature unknown, what conductor size is needed for a 3-phase, 30 horsepower motor that will be connected to 480 volts?
A: 6 AWG

Q: You are asked to install a motor with the following nameplate information, Phase 3, service factor 1.25, volts 440, HP 20, Amperes 23, Induction type. What will be the size of overload device?
A: 28.75A