Electrical Practice Exam questions
with complete solutions
An accidental path of low resistance, allowing passage of abnormal amount of current is known
as a/an ________. - correct answer ✔✔ Short Circuit.
Electric current is the flow of electrons through a conductor. The rate of this flow is measured as
_______. - correct answer ✔✔ Coulombs/second.
The unit of electrical resistance is the _______. - correct answer ✔✔ Ohm.
Electric motors intended for use outside the engine room and boiler room are frequently rated
to run at a designed ambient temperature of 40*C. What is the equivalent temperature in
degrees Fahrenheit? - correct answer ✔✔ 104.0 *F
The sub-multiple prefix 'micro' (Greek letter 'mu') means _______. - correct answer ✔✔
Millionth (10 to the -6th power)
Electrical power loss due to hysteresis is a result of _________. - correct answer ✔✔ Heat
generated by magnetic polarity reversals.
Alternating current circuits develop resistance, inductance and capacitance. The inductance of a
coil is expressed in _______. - correct answer ✔✔ Henrys.
The number of cycles per second occurring in AC voltage is known as the _________. - correct
answer ✔✔ Frequency.
, The apparent power in a purely inductive circuit is also known as ________. - correct answer
✔✔ Reactive Power.
The combined effect of inductive reactance, capacitive reactance, and resistance in an AC series
circuit is known as ________. - correct answer ✔✔ Impedance.
Capacitance is the property of an electric circuit opposing a change in the __________. - correct
answer ✔✔ Voltage in the circuit.
The electrical diagram shown in the illustration is used to depict a/an ___________.
Illustration EL-0015 - correct answer ✔✔ Capacitive circuit.
Reversing the DC current flow through an electrical coil will __________. - correct answer ✔✔
Reverse its two-pole field.
In the illustration, "D" is the symbol for a/an _________.
Illustration EL-0005 - correct answer ✔✔ Fuse.
Which of the listed electrical devices is represented by the symbol shown in the illustration?
Illustration EL-0055 - correct answer ✔✔ Transformer.
The purpose of a magnetic relay is to __________. - correct answer ✔✔ Remotely open and
close contacts.
with complete solutions
An accidental path of low resistance, allowing passage of abnormal amount of current is known
as a/an ________. - correct answer ✔✔ Short Circuit.
Electric current is the flow of electrons through a conductor. The rate of this flow is measured as
_______. - correct answer ✔✔ Coulombs/second.
The unit of electrical resistance is the _______. - correct answer ✔✔ Ohm.
Electric motors intended for use outside the engine room and boiler room are frequently rated
to run at a designed ambient temperature of 40*C. What is the equivalent temperature in
degrees Fahrenheit? - correct answer ✔✔ 104.0 *F
The sub-multiple prefix 'micro' (Greek letter 'mu') means _______. - correct answer ✔✔
Millionth (10 to the -6th power)
Electrical power loss due to hysteresis is a result of _________. - correct answer ✔✔ Heat
generated by magnetic polarity reversals.
Alternating current circuits develop resistance, inductance and capacitance. The inductance of a
coil is expressed in _______. - correct answer ✔✔ Henrys.
The number of cycles per second occurring in AC voltage is known as the _________. - correct
answer ✔✔ Frequency.
, The apparent power in a purely inductive circuit is also known as ________. - correct answer
✔✔ Reactive Power.
The combined effect of inductive reactance, capacitive reactance, and resistance in an AC series
circuit is known as ________. - correct answer ✔✔ Impedance.
Capacitance is the property of an electric circuit opposing a change in the __________. - correct
answer ✔✔ Voltage in the circuit.
The electrical diagram shown in the illustration is used to depict a/an ___________.
Illustration EL-0015 - correct answer ✔✔ Capacitive circuit.
Reversing the DC current flow through an electrical coil will __________. - correct answer ✔✔
Reverse its two-pole field.
In the illustration, "D" is the symbol for a/an _________.
Illustration EL-0005 - correct answer ✔✔ Fuse.
Which of the listed electrical devices is represented by the symbol shown in the illustration?
Illustration EL-0055 - correct answer ✔✔ Transformer.
The purpose of a magnetic relay is to __________. - correct answer ✔✔ Remotely open and
close contacts.
