Electrical Theory Practice Test Questions with Verified Answers
Voltmeter - -A high resistance is connected in series Electrical appliances shall be installed in parallel in order
with the internal coil of a galvanometer to make? to make the operation of each appliance in- dependent of
the others. - -True
If a transformer ratio is 20/1, what does it mean for the
secondary? - -The primary voltage is 20 times In order to calculate watt hours, which formulas must be
greater than that of the secondary. used? - -Amps/Volts (Amps Divided By Volts)
If a motor enclosure is designed to contain sparks or The peak value of AC voltage determines the breakdown
flashes that could ignite surrounding vapors or gases, voltage of insulation. - -TRUE
then the enclosure is considered to be which of the
following: - -Ventilated
The efficiency of electrical equipment is determined by
what? - -The motor speed divided by the input
The output of a 3-phase transformer is measured in what power
units? - -Amperes
Inductance and capacitance are not considerations in a
In order to change the rotation of a DC series motor, what DC current because? - -DC supply carries power
must be done? - -F1 and F2 must be reversed. equally
What does Bonding do? - -Controls the load on the Two transmission wires create a corona when...? - -
system installation The wires are installed overlapping or too close together
A meter used to measure both AC and DC voltage and Rearranging the control components in an electrical
current is known as? - -Multimeter diagram in order to simplify tracing of a circuit is an
example of a schematic diagram. - -TRUE
What material is used on conduits inside and outside of a
box? - -Couplings In a coil, the higher the level of self-inductance: - -
The longer the delay will be in establishing current through
it
If a transformer has a voltage step-down from 117 volts to
6 volts then the ratio of the transformer is equal to what? -
-1: 19, 5 A negative charge will do which of the following: 1. I.
Interact with negative charges 2. II. Interact with positive
charges 3. III. Cause a short in a positive system - -I
If the power factor of a circuit is increased, then what & II
occurs? - -The reactive power is decreased
If a circuit breaker is installed vertically and the handle is
In a 3Ø circuit, how many electrical degrees separate flipped up, then the circuit breaker will be what? - -
each phase: - -120 Locked in place
Ground fault protection for personnel on a 120 volt single- The electrical property of conductors that allows them to
phase circuit is based on? - -Unbalanced current oppose the free flow of current traveling over them is
between the grounded and ungrounded conductor. measured in what? - -Volts
1/2
Voltmeter - -A high resistance is connected in series Electrical appliances shall be installed in parallel in order
with the internal coil of a galvanometer to make? to make the operation of each appliance in- dependent of
the others. - -True
If a transformer ratio is 20/1, what does it mean for the
secondary? - -The primary voltage is 20 times In order to calculate watt hours, which formulas must be
greater than that of the secondary. used? - -Amps/Volts (Amps Divided By Volts)
If a motor enclosure is designed to contain sparks or The peak value of AC voltage determines the breakdown
flashes that could ignite surrounding vapors or gases, voltage of insulation. - -TRUE
then the enclosure is considered to be which of the
following: - -Ventilated
The efficiency of electrical equipment is determined by
what? - -The motor speed divided by the input
The output of a 3-phase transformer is measured in what power
units? - -Amperes
Inductance and capacitance are not considerations in a
In order to change the rotation of a DC series motor, what DC current because? - -DC supply carries power
must be done? - -F1 and F2 must be reversed. equally
What does Bonding do? - -Controls the load on the Two transmission wires create a corona when...? - -
system installation The wires are installed overlapping or too close together
A meter used to measure both AC and DC voltage and Rearranging the control components in an electrical
current is known as? - -Multimeter diagram in order to simplify tracing of a circuit is an
example of a schematic diagram. - -TRUE
What material is used on conduits inside and outside of a
box? - -Couplings In a coil, the higher the level of self-inductance: - -
The longer the delay will be in establishing current through
it
If a transformer has a voltage step-down from 117 volts to
6 volts then the ratio of the transformer is equal to what? -
-1: 19, 5 A negative charge will do which of the following: 1. I.
Interact with negative charges 2. II. Interact with positive
charges 3. III. Cause a short in a positive system - -I
If the power factor of a circuit is increased, then what & II
occurs? - -The reactive power is decreased
If a circuit breaker is installed vertically and the handle is
In a 3Ø circuit, how many electrical degrees separate flipped up, then the circuit breaker will be what? - -
each phase: - -120 Locked in place
Ground fault protection for personnel on a 120 volt single- The electrical property of conductors that allows them to
phase circuit is based on? - -Unbalanced current oppose the free flow of current traveling over them is
between the grounded and ungrounded conductor. measured in what? - -Volts
1/2
