4TH CLASS ABSA EXAM PART A PRACTICE EXAM QUESTIONS AND
ANSWERS
Absolute pressure is: - CORRECT ANSWER✅✅gauge pressure plus atmospheric pressure
The motion of moving parts is _____ by friction:
A: Prevented
B: Improved
C: controlled
D: resisted
E: Regulated - CORRECT ANSWER✅✅D: resisted
Voltage is
a) the rate of current flow
b) the rate of electron flow
c) electromotive force
d) Kinetic energy
e) A form of power - CORRECT ANSWER✅✅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 - CORRECT ANSWER✅✅d) 1,2,3,4
The movement of electrons in a conductor can be measured in:
a) Amperes
b) Ohms
c) Volts
d) Watts
e) Micrometer - CORRECT ANSWER✅✅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 - CORRECT ANSWER✅✅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
e) is a rotating conductor - CORRECT ANSWER✅✅d) commutator
,The unit for the oppostion to current flow is the:
a) volt
b) amperes
c) ohm
d) watt
e) resistance - CORRECT ANSWER✅✅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 - CORRECT ANSWER✅✅d) Equal to the rated value of the fuse
Electric overloads may be due to
1. Applying too heavy load to an electric motor
2. Lightning strike
3. A short circuit
4. Overloading a circuit with too many devices
5. Addition of circuit breakers
a) 1,2,3,4
b) 1,3,4,5
c) 1,2,5
d) 2,3,4
e) 1,3,5 - CORRECT ANSWER✅✅a) 1,2,3,4
, Since the discovery of electrons, it has been determined that electrons are a negative charge and flow
from:
Select one:
a. positive to negative
b. north to south
c. south to north
d. a lower potential to a higher potential
e. a higher potential to a lower potential - CORRECT ANSWER✅✅d
The yoke that supports the main components of the DC machine is frequently made of:
a) Copper or brass
b) Mica and carbon
c) Copper and carbon
d) Cast steel or iron
e) Stainless steel - CORRECT ANSWER✅✅d
Electrical current flow through a conductor is caused by the drift of:
a) Photons
b) Neutrons
c) Electrons
d) Proteins
e) Protons - CORRECT ANSWER✅✅c
A device used to change the voltage and current from one level to another is known as:
a) Conductor
ANSWERS
Absolute pressure is: - CORRECT ANSWER✅✅gauge pressure plus atmospheric pressure
The motion of moving parts is _____ by friction:
A: Prevented
B: Improved
C: controlled
D: resisted
E: Regulated - CORRECT ANSWER✅✅D: resisted
Voltage is
a) the rate of current flow
b) the rate of electron flow
c) electromotive force
d) Kinetic energy
e) A form of power - CORRECT ANSWER✅✅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 - CORRECT ANSWER✅✅d) 1,2,3,4
The movement of electrons in a conductor can be measured in:
a) Amperes
b) Ohms
c) Volts
d) Watts
e) Micrometer - CORRECT ANSWER✅✅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 - CORRECT ANSWER✅✅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
e) is a rotating conductor - CORRECT ANSWER✅✅d) commutator
,The unit for the oppostion to current flow is the:
a) volt
b) amperes
c) ohm
d) watt
e) resistance - CORRECT ANSWER✅✅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 - CORRECT ANSWER✅✅d) Equal to the rated value of the fuse
Electric overloads may be due to
1. Applying too heavy load to an electric motor
2. Lightning strike
3. A short circuit
4. Overloading a circuit with too many devices
5. Addition of circuit breakers
a) 1,2,3,4
b) 1,3,4,5
c) 1,2,5
d) 2,3,4
e) 1,3,5 - CORRECT ANSWER✅✅a) 1,2,3,4
, Since the discovery of electrons, it has been determined that electrons are a negative charge and flow
from:
Select one:
a. positive to negative
b. north to south
c. south to north
d. a lower potential to a higher potential
e. a higher potential to a lower potential - CORRECT ANSWER✅✅d
The yoke that supports the main components of the DC machine is frequently made of:
a) Copper or brass
b) Mica and carbon
c) Copper and carbon
d) Cast steel or iron
e) Stainless steel - CORRECT ANSWER✅✅d
Electrical current flow through a conductor is caused by the drift of:
a) Photons
b) Neutrons
c) Electrons
d) Proteins
e) Protons - CORRECT ANSWER✅✅c
A device used to change the voltage and current from one level to another is known as:
a) Conductor
