BOMA Electrical Motor Controls Exam
Latest Updated Graded A+
A _____ is used to measure electrical potential? - ANSWER-voltmeter
A _____ is used to measure resistance? - ANSWER-ohmmeter
A 3 way switch is essentially a? - ANSWER-single pole double throw switch
A 4S box is the most frequently used in one of the situations shown below. Which is it? -
ANSWER-Junction box
A combination motor starter always includes? - ANSWER-Circuit breaker, fuse and
disconnecting device
A device used to measure the rotating speed of the motor is called? - ANSWER-
tachometer
A generator? - ANSWER-Changes mechanical power into electrical power
A holding contact or maintaining contact in a magnetic motor starter is normally
connected in parallel with the? - ANSWER-Stop push button, start push button, and
starter coil
A machine that converts mechanical power into electrical power is called a? -
ANSWER-A generator and alternator
A motor control circuit that allows the motor to automatically start after power is restored
provides low voltage release? - ANSWER-Is said to be wired across the line is provided
A motor starter is a conductor with a _____ built in? - ANSWER-Overload
A normally closed relay contact will be _____ when the relay is _____? - ANSWER-
Closed, de-energized
A relay is a device that can transfer an action from one circuit to another without an
electrical connection between the two circuits? - ANSWER-True
A set of normally open contacts are_____when the relay is_____? - ANSWER-Open,
de-energized
A short circuit ground fault device may consist of? - ANSWER-A fuse and a circuit
breaker
, A short circuit ground fault device may consist of? - ANSWER-Fuse and circuit breaker
A small size motor starter is given the designation of 00? - ANSWER-True
A starter that has 3 electrical separate sets of a power contacts would be classified as a
3 pole motor starter? - ANSWER-True
A sudden current surge that occurs when a motor driven appliance is turned off? -
ANSWER-normal overcurrent
A_____is used to measure current? - ANSWER-ampmeter
Combination starters designed to have disconnect and the motor starter include in one
single enclosure? - ANSWER-True
Distilled water should be added to a battery when? - ANSWER-when level is below the
plates
Fish tape can be made of? - ANSWER-Tempered steel, nylon, would steal cable
Flex? - ANSWER-Provides a good grounding path when used as an equipment
grounding conductor
Generators make electricity by? - ANSWER-rotating armature in a magnetic field
How do you change the rotation of a three phase motor? - ANSWER-Change any 2 of
the 3 wires
If a switch can be closed by moving a contact to only one position, it is a _____ switch?
- ANSWER-single throw
Improper alignment of the pole faces can cause excessive hum in a AC electromagnetic
or solenoid? - ANSWER-True
In a process control, the time it takes for a change in the process to be felt at the
measuring device is called? - ANSWER-delay
In a process control, the time it takes for a change in the process to be felt at the
measuring device is called? - ANSWER-Delay
In a transformer the coil to which the induced voltage is applied is the? - ANSWER-
primary
In a transformer to which the input voltage is applied is the? - ANSWER-primary
In anmeter is connected in series with the load? - ANSWER-True
Latest Updated Graded A+
A _____ is used to measure electrical potential? - ANSWER-voltmeter
A _____ is used to measure resistance? - ANSWER-ohmmeter
A 3 way switch is essentially a? - ANSWER-single pole double throw switch
A 4S box is the most frequently used in one of the situations shown below. Which is it? -
ANSWER-Junction box
A combination motor starter always includes? - ANSWER-Circuit breaker, fuse and
disconnecting device
A device used to measure the rotating speed of the motor is called? - ANSWER-
tachometer
A generator? - ANSWER-Changes mechanical power into electrical power
A holding contact or maintaining contact in a magnetic motor starter is normally
connected in parallel with the? - ANSWER-Stop push button, start push button, and
starter coil
A machine that converts mechanical power into electrical power is called a? -
ANSWER-A generator and alternator
A motor control circuit that allows the motor to automatically start after power is restored
provides low voltage release? - ANSWER-Is said to be wired across the line is provided
A motor starter is a conductor with a _____ built in? - ANSWER-Overload
A normally closed relay contact will be _____ when the relay is _____? - ANSWER-
Closed, de-energized
A relay is a device that can transfer an action from one circuit to another without an
electrical connection between the two circuits? - ANSWER-True
A set of normally open contacts are_____when the relay is_____? - ANSWER-Open,
de-energized
A short circuit ground fault device may consist of? - ANSWER-A fuse and a circuit
breaker
, A short circuit ground fault device may consist of? - ANSWER-Fuse and circuit breaker
A small size motor starter is given the designation of 00? - ANSWER-True
A starter that has 3 electrical separate sets of a power contacts would be classified as a
3 pole motor starter? - ANSWER-True
A sudden current surge that occurs when a motor driven appliance is turned off? -
ANSWER-normal overcurrent
A_____is used to measure current? - ANSWER-ampmeter
Combination starters designed to have disconnect and the motor starter include in one
single enclosure? - ANSWER-True
Distilled water should be added to a battery when? - ANSWER-when level is below the
plates
Fish tape can be made of? - ANSWER-Tempered steel, nylon, would steal cable
Flex? - ANSWER-Provides a good grounding path when used as an equipment
grounding conductor
Generators make electricity by? - ANSWER-rotating armature in a magnetic field
How do you change the rotation of a three phase motor? - ANSWER-Change any 2 of
the 3 wires
If a switch can be closed by moving a contact to only one position, it is a _____ switch?
- ANSWER-single throw
Improper alignment of the pole faces can cause excessive hum in a AC electromagnetic
or solenoid? - ANSWER-True
In a process control, the time it takes for a change in the process to be felt at the
measuring device is called? - ANSWER-delay
In a process control, the time it takes for a change in the process to be felt at the
measuring device is called? - ANSWER-Delay
In a transformer the coil to which the induced voltage is applied is the? - ANSWER-
primary
In a transformer to which the input voltage is applied is the? - ANSWER-primary
In anmeter is connected in series with the load? - ANSWER-True
