Electrical apprenticeship first year Final Exam-Graded A

Electrical apprenticeship first year
Final Exam-Graded A

(d) compound(s) - ANSWER-When the atoms of elements combine, they produce
_____. The smallest particle of a(n) _____ is called a molecule.

(a) matter
(b) element(s)
(c) energy
(d) compound(s)

(a) True - ANSWER-Electrostatic charge is due to an excess of, or a deficiency of,
electrons between objects that have been separated.

(a) True
(b) False

(b) False - ANSWER-Lightning protection is intended to protect the building itself, as
well as the electrical equipment on or inside the structure.

(a) True
(b) False

(a) True - ANSWER-Compounds can change the electrical characteristics of an
individual atom. For example, the insulating aluminum-oxide compound is very difficult
to break and it often results in the overheating of aluminum conductors at their
terminals.

(a) True
(b) False

(a) True - ANSWER-If a permanent magnet is struck with a hammer, it will lose some of
its magnetism; each subsequent blow helps the molecules return to their original
random positions.

(a) True
(b) False

(a) True - ANSWER-A battery is a power source where voltaic cells are combined in a
series arrangement, positive terminal to negative terminal, so that the voltage of one cell
is added to the voltage of the other cells.

, (a) True
(b) False

(a) True - ANSWER-"Electroplating" is building up layers of metal on one surface by
removing the same metal from another surface by using a chemical action with electric
current in a solution.

(a) True
(b) False

(a) True - ANSWER-To ensure the minimum practical safeguarding of persons and
property from the use of electricity, all premises wiring must be installed in accordance
with the National Electrical Code (NEC).

(a) True
(b) False

(b) False - ANSWER-When electrons are forced to move through a conductor, the
magnetic fields of individual electrons subtract from one another.

(a) True
(b) False

(d) resistance - ANSWER-The Megger is used to measure very high-_____ values,
such as those found in cable insulation, or motor and transformer windings.

(a) voltage
(b) current
(c) power
(d) resistance

(b) False - ANSWER-"Normally Open" means the contacts are closed when the coil is
energized.

(a) True
(b) False

(a) True - ANSWER-Every component of an electrical circuit contains resistance, except
the power supply.

(a) True
(b) False

(b) Power - ANSWER-"__________" is defined as the rate of work measured by the unit
called watt.