Electrical final (ABSA 1) UPDATED
ACTUAL Questions and CORRECT
Answers
Resistance
1. limits current flow
2. depends on temperature
3. depends on material
4. depends on dimensions - CORRECT ANSWER - 1, 2, 3, 4
Conductive materials.
1) Gain resistance while temperature rises while others lose resistance
2) Have no resistance change with temperature change
3) Always have resistance changing directly with temperature
4) Can vary resistance directly or inversely with temperature
a. 1, 3, 4
b. 2, 3
c. 2, 4
d. 1, 4
e. 1, 2, 3, 4 - CORRECT ANSWER - gain resistance while temperature rises while others
loose resistance
d
Free valence electrons flow from _______ when connected to an electrical supply.
a. positive to negative
b. negative to positive
c. positive to proton
,d. negative to proton
e. positive to neutron - CORRECT ANSWER -b
Where an approximate constant speed is to be maintained between no-load and full-load the DC
motor to use would be:
Select one:
A. Compound.
B. Shunt.
C. Separately-excited.
D. Series.
E. Self-excited. - CORRECT ANSWER -b
An electrical source would be in the form of a:
1. Battery
2. Magnet
3. Flux
4. Generator - CORRECT ANSWER - 1, 4
The practical unit used to represent electrical load is:
a. impedance
b. Amp
c. ohm
d. farad
e. henry - CORRECT ANSWER -c
Electric current flow depends on the number of charges:
a. between two points
, b. per second
c. in motion
d. as a potential
e. per mechanical out put - CORRECT ANSWER -c
DC motors are restricted to a starting current of about _______ percent of full load current.
a. 50
b. 100
c. 150
d. 200
e. 250 - CORRECT ANSWER -c
The torque produced by the armature conductors is a generator:
1. increase with load
2. decrease with load
3. opposes the driving torque
4. is load torque - CORRECT ANSWER - 1, 3, 4
The three basic ways in which a self-excited generator field can be connected are classified:
1. shunt generator
2. compound generator
3. series generator
4. parallel generator - CORRECT ANSWER - 1, 2, 3
In a magnetic circuit, the magnetic flux is the equivalent of electric _______ in an electric
circuit:
a. vintage
b. reluctance
ACTUAL Questions and CORRECT
Answers
Resistance
1. limits current flow
2. depends on temperature
3. depends on material
4. depends on dimensions - CORRECT ANSWER - 1, 2, 3, 4
Conductive materials.
1) Gain resistance while temperature rises while others lose resistance
2) Have no resistance change with temperature change
3) Always have resistance changing directly with temperature
4) Can vary resistance directly or inversely with temperature
a. 1, 3, 4
b. 2, 3
c. 2, 4
d. 1, 4
e. 1, 2, 3, 4 - CORRECT ANSWER - gain resistance while temperature rises while others
loose resistance
d
Free valence electrons flow from _______ when connected to an electrical supply.
a. positive to negative
b. negative to positive
c. positive to proton
,d. negative to proton
e. positive to neutron - CORRECT ANSWER -b
Where an approximate constant speed is to be maintained between no-load and full-load the DC
motor to use would be:
Select one:
A. Compound.
B. Shunt.
C. Separately-excited.
D. Series.
E. Self-excited. - CORRECT ANSWER -b
An electrical source would be in the form of a:
1. Battery
2. Magnet
3. Flux
4. Generator - CORRECT ANSWER - 1, 4
The practical unit used to represent electrical load is:
a. impedance
b. Amp
c. ohm
d. farad
e. henry - CORRECT ANSWER -c
Electric current flow depends on the number of charges:
a. between two points
, b. per second
c. in motion
d. as a potential
e. per mechanical out put - CORRECT ANSWER -c
DC motors are restricted to a starting current of about _______ percent of full load current.
a. 50
b. 100
c. 150
d. 200
e. 250 - CORRECT ANSWER -c
The torque produced by the armature conductors is a generator:
1. increase with load
2. decrease with load
3. opposes the driving torque
4. is load torque - CORRECT ANSWER - 1, 3, 4
The three basic ways in which a self-excited generator field can be connected are classified:
1. shunt generator
2. compound generator
3. series generator
4. parallel generator - CORRECT ANSWER - 1, 2, 3
In a magnetic circuit, the magnetic flux is the equivalent of electric _______ in an electric
circuit:
a. vintage
b. reluctance
