ELECTRICAL THEORY EXAM QUESTIONS AND ANSWERS 100% VERIFIED
1. Providing a path to the earth often helps (a) True
reduce electrostatic charge.
(a) True
(b) False
2. Lightning frequently terminates to a point of (a) True
elevation and it strikes nonmetallic as well
as metallic objects with the same frequency.
(a) True
(b) False
3. The termination of the lightning strike is (b) False
unlikely to ignite combustible materials.
(a) True
(b) False
4. Lightning protection is intended to protect (b) False
the building structure itself, as well as the
electrical equipment on or inside the build-
ing structure.
(a) True
(b) False
5. Nonmagnetic metals are ferrous, meaning (b) False
they do not contain any iron, and cannot be
magnetized.
(a) True
(b) False
6. Magnetic lines of force can cross each other (b) False
and they are called flux lines.
(a) True
(b) False
,ELECTRICAL THEORY EXAM QUESTIONS AND ANSWERS 100% VERIFIED
7. It is not the force of the magnetic field (a) True
through a conductor that produces electric-
ity; it is the relative motion of the field to
the electrons within the conductor that pro-
duces the movement of electrons.
(a) True
(b) False
8. People become injured and death might oc- (a) True
cur when voltage pushes electrons through
the human body causing the heart to go into
ventricular fibrillation.
(a) True
(b) False
9. The severity of an electric shock is depen- (a) True
dent on the current flowing through the
body, which is impacted by circuit voltage
and contact resistance.
(a) True
(b) False
10. An electrical arc blast can approach (d) 30,000*F
, which vaporizes metal
parts and produces an explosive and deadly
pressure wave.
(a) 10,000*F
(b) 15,000*F
(c) 25,000*F
(d) 30,000*F
11. If a conductor carrying current is next to an- (a) True
other conductor carrying current in the op-
posite direction, the electromagnetic field
attempts to push the conductors apart.
, ELECTRICAL THEORY EXAM QUESTIONS AND ANSWERS 100% VERIFIED
(a) True
(b) False
12. A clamp-on ac ammeter has a coil that is (d) Magnetic
clamped around the conductor and detects
the rising and falling field be-
ing produced due to the as flow through the
conductor.
(a) static
(b) current
(c) power
(d) magnetic
13. Ohmmeters measure the or op- (d) resistance
position to current flow of a circuit or com-
ponent.
(a) Voltage
(b) current
(c) power
(d) resistance
14. The megger is used to measure very high- (d) resistance
values, such as those found
in cable insulation, or motor and trans-
former windings.
(a) Voltage
(b) current
(c) power
(d) resistance
15. The electric motor on the principle of (d) magnetic
the attracting and repelling forces of
fields.
(a) Voltage
(b) current
1. Providing a path to the earth often helps (a) True
reduce electrostatic charge.
(a) True
(b) False
2. Lightning frequently terminates to a point of (a) True
elevation and it strikes nonmetallic as well
as metallic objects with the same frequency.
(a) True
(b) False
3. The termination of the lightning strike is (b) False
unlikely to ignite combustible materials.
(a) True
(b) False
4. Lightning protection is intended to protect (b) False
the building structure itself, as well as the
electrical equipment on or inside the build-
ing structure.
(a) True
(b) False
5. Nonmagnetic metals are ferrous, meaning (b) False
they do not contain any iron, and cannot be
magnetized.
(a) True
(b) False
6. Magnetic lines of force can cross each other (b) False
and they are called flux lines.
(a) True
(b) False
,ELECTRICAL THEORY EXAM QUESTIONS AND ANSWERS 100% VERIFIED
7. It is not the force of the magnetic field (a) True
through a conductor that produces electric-
ity; it is the relative motion of the field to
the electrons within the conductor that pro-
duces the movement of electrons.
(a) True
(b) False
8. People become injured and death might oc- (a) True
cur when voltage pushes electrons through
the human body causing the heart to go into
ventricular fibrillation.
(a) True
(b) False
9. The severity of an electric shock is depen- (a) True
dent on the current flowing through the
body, which is impacted by circuit voltage
and contact resistance.
(a) True
(b) False
10. An electrical arc blast can approach (d) 30,000*F
, which vaporizes metal
parts and produces an explosive and deadly
pressure wave.
(a) 10,000*F
(b) 15,000*F
(c) 25,000*F
(d) 30,000*F
11. If a conductor carrying current is next to an- (a) True
other conductor carrying current in the op-
posite direction, the electromagnetic field
attempts to push the conductors apart.
, ELECTRICAL THEORY EXAM QUESTIONS AND ANSWERS 100% VERIFIED
(a) True
(b) False
12. A clamp-on ac ammeter has a coil that is (d) Magnetic
clamped around the conductor and detects
the rising and falling field be-
ing produced due to the as flow through the
conductor.
(a) static
(b) current
(c) power
(d) magnetic
13. Ohmmeters measure the or op- (d) resistance
position to current flow of a circuit or com-
ponent.
(a) Voltage
(b) current
(c) power
(d) resistance
14. The megger is used to measure very high- (d) resistance
values, such as those found
in cable insulation, or motor and trans-
former windings.
(a) Voltage
(b) current
(c) power
(d) resistance
15. The electric motor on the principle of (d) magnetic
the attracting and repelling forces of
fields.
(a) Voltage
(b) current
