4th Class ABSA Exam Part A Practice Actual Exam
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Absolute pressure is: - Answers-gauge pressure plus
atmospheric pressure
The motion of moving parts is _____ by friction:
A: Prevented
B: Improved
C: controlled
D: resisted
E: Regulated - Answers-D: resisted
Voltage is
a) the rate of current flow
b) the rate of electron flow
c) electromotive force
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d) Kinetic energy
e) A form of power - Answers-c) electromotive force
The resistance of a conductor is affected by:
1. Cross section area
2. Length
3. Temperature
4. Type of material
a) 1,2,3
b) 1,2,4
c) 1,3
d) 1,2,3,4
e) 1,2 - Answers-d) 1,2,3,4
The movement of electrons in a conductor can be
measured in:
a) Amperes
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b) Ohms
c) Volts
d) Watts
e) Micrometer - Answers-a) Amperes
An electric motor has a 3/4 horse power output rating.
Calculate the rating in kilowatts:
a) 0.56
b) 0.75
c) 0.70
d) 7.5
e) 1.005 - Answers-a) 0.56
The connection provided on DC motors to supply the
armature with power:
a) are slip rings
b) are field poses
c) is a rheostat
d) commutator
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e) is a rotating conductor - Answers-d) commutator
The unit for the oppostion to current flow is the:
a) volt
b) amperes
c) ohm
d) watt
e) resistance - Answers-c) ohm
In an electric circuit protected by a single fuse the current
flowing through the fuse must be:
a) Equal to the voltage in the circuit
b) Equal to the resistance in the circuit
c) All of the current in the circuit
d) Equal to the rated value of the fuse
e) 1.732 times the applied current - Answers-d) Equal to
the rated value of the fuse
Electric overloads may be due to