Exam Details
| Subject | basic of electrical engineering | |
| Paper | ||
| Exam / Course | diploma engineering | |
| Department | ||
| Organization | Gujarat Technological University | |
| Position | ||
| Exam Date | January, 2019 | |
| City, State | gujarat, ahmedabad |
Question Paper
1/9
Seat No.: Enrolment
GUJARAT TECHNOLOGICAL UNIVERSITY
DIPLOMA ENGINEERING- C to D Bridge Course Examination WINTER 2018
Subject Code: C320901 Date: 04-01-2019
Subject Name: Basic Of Electrical Engineering
Time: 02:30 PM TO 04:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Each question is of 1 mark.
4. Use of only simple calculator is permitted. (Scientific/Higher Version not allowed).
5. English version is authentic.
No.
Question Text and Option.
1.
The SI unit of
A.
Henry
B.
Warr-hour
C.
Watt
D.
AT
SI
A.
B.
C.
D.
2.
A resistance of 230 volt, 50 watt bulb will
A.
529
B.
52
C.
1058
D.
105
A.
B.
C.
D.
3.
An A.C. current given by i=100 sinωt has maximum value of____amperes.
A.
100
B.
14.14
C.
1
D.
7.07
sinωt
A.
B.
C.
D.
4.
Fleming's left hand rule is used to find the direction
A.
Current
B.
Force
C.
E.M.F
D.
None of the above
A.
B.
C.
D.
5.
The p.f of an purely Resistive circuit is
A.
Often zero
B.
Between zero and 1
C.
Always unity
D.
Between zero and
A.
B.
C.
D.
6.
The p.f of an R-C circuit is
A.
Often zero
B.
Between zero and 1
C.
Always unity
D.
Between zero and
R-C
A.
B.
C.
D.
2/9
7.
The instrument which measure voltage is known as
A.
Ammeter
B.
Voltmeter
C.
Wattmeter
D.
Galvanometer
A.
B.
C.
D.
8.
The Peak factor is
A.
Maximum value rms value
B.
Rms value average value
C.
Average value rms value
D.
None of the above
A.
B.
C.
D.
9.
Cosine of the angle between voltage vector and current vector is known as
A.
Power
B.
Resistance
C.
Power factor
D.
Voltage
A.
B.
C.
D.
10.
The value of Peak factor is
A.
1.11
B.
11
C.
1.1
D.
1.414
A.
B.
C.
D.
11.
Fleming's right hand rule is used to find the direction
A.
Current
B.
Force
C.
E.M.F.
D.
None of the above
A.
B.
C.
D.
12.
The power taken by a 3 phase load is given by
A.
3 VL IL sinø
B.
√3 VL IL sinø
C.
3 VL IL cosø
D.
√3 VL IL cosø
A.
3 VL IL sinø
B.
√3 VL IL sinø
C.
3 VL IL cosø
D.
√3 VL IL cosø
13.
The resistance of a wire depends
A.
Cross sectional area
B.
Material
C.
Length
D.
All of the above
A.
B.
C.
D.
14.
The resistance of a straight conductor is independent
A.
Temperature
B.
Material
C.
Cross-sectional area
D.
Shape of cross-section
A.
B.
C.
D.
15.
The area of hysteresis loop
A.
Eddy current loss
B.
Iron loss
C.
Hysteresis loss
D.
Copper loss
3/9
A.
B.
C.
D.
16.
Insulators have temperature co-efficient of resistance.
A.
Positive
B.
Zero
C.
Negative
D.
None of the above
A.
B.
C.
D.
17.
An A.C. circuit usually has as the load.
A.
Resistance
B.
Inductance
C.
Capacitance
D.
All of the above
A.
B.
C.
D.
18.
Weber is the unit
A.
Energy
B.
Power
C.
Electric charge
D.
Flux
A.
B.
C.
D.
19.
Relative permeability of air
A.
1
B.
C.
× 10-7
D.
0
A.
B.
C.
×
D.
20.
The value of form factor is
A.
0
B.
10
C.
1
D.
1.11
A.
0
B.
C.
D.
21.
In, India the value of supply frequency of electricity is
A.
50 Hz
B.
25 Hz
C.
60 Hz
D.
10 Hz
A.
Hz
B.
Hz
C.
Hz
D.
Hz
22.
Full form of MCB
A.
Miniature coil breaker
B.
Mounted circuit board
C.
Minimum current board
D.
Miniature circuit breaker
MCB
A.
B.
C.
D.
23.
A fuse wire is a wire
A.
High resistance and low melting point
B.
High resistance and high melting point
4/9
C.
Low resistance and low melting point
D.
Low resistance and high melting point
A.
B.
C.
D.
24.
Lamps used for house lighting are connected
A.
Series
B.
Parallel
C.
Series-Parallel
D.
None of the above
A.
B.
C.
D.
25.
Which relationship is incorrect
A.
VR
B.
V=IR
C.
D.
A.
VR
B.
V=IR
C.
D.
26.
Hysteresis loop is drawn
A.
B H
B.
P E
C.
V I
D.
None of the above
A.
B H
B.
P E
C.
V I
D.
27.
Power consumed by purely capacitive circuit
A.
V I
B.
VI cosø
C.
I 2 R
D.
Zero
A.
V I
B.
VI cosø
C.
I 2 R
D.
28.
The material used for the core of a good relay should have hysteresis loop.
A.
Large
B.
Very large
C.
Narrow
D.
None of the above
A.
B.
C.
D.
29.
For three phase delta connection____
A.
VL =VPh
B.
VL √3VPh
C.
IL IPh
D.
IL 3IPh
A.
VL =VPh
B.
VL √3VPh
C.
IL IPh
D.
IL 3IPh
30.
Frequency is the inverse of
A.
Voltage
B.
Power
C.
Current
D.
Time period
A.
B.
C.
D.
31.
For three phase star connection____
A.
VL =VPh
B.
VL 3VPh
C.
IL IPh
D.
IL 3IPh
5/9
A.
VL =VPh
B.
VL 3VPh
C.
IL IPh
D.
IL 3IPh
32.
The E.M.F. induced in a coil of N turns is given
A.
dø/dt
B.
N dø/dt
C.
dø/dt
D.
N dt/dø
N
A.
dø/dt
B.
N dø/dt
C.
dø/dt
D.
N dt/dø
33.
In A.C circuit inductive reactance is given
A.
XL
B.
X L 2πfL
C.
X C=2πfc
D.
R L 2πfLC
A.
XL
B.
X L 2πfL
C.
X C=2πfc
D.
R L 2πfLC
34.
For the average value of current which equation is true
A.
Iav 0.637 Im
B.
Iav =0.367Im
C.
Iav 0.673Im
D.
Iav 0.736 Im
A.
Iav 0.637 Im
B.
Iav =0.367Im
C.
Iav 0.673Im
D.
Iav 0.736 Im
35.
Which of the following equation is true R.M.S value
A.
Irms =Im
B.
Irms =Im /√2
C.
Im=Irms /√2
D.
Irms =√2Im
A.
Irms m
B.
Irms m /√2
C.
Im=I rms /√2
D.
Irms =√2I m
36.
To reduce eddy current loss armature of a machine
A.
Laminated
B.
Silicon steel is used
C.
Both
D.
None of the above
A.
B.
C.
D.
37.
Power consumed by purely resistive circuit
A.
VI
B.
VI cosø
C.
Zero
D.
VI sinø
A.
VI
B.
VI cosø
C.
D.
VI sinø
38.
Which of the following is considered as PPE?
A.
Helmets
B.
Generator
C.
Motor
D.
All of the above
PPE
A.
B.
C.
D.
39.
A Generator is used to
A.
Change mechanical energy to electrical energy
B.
Increase energy into it
C.
Change electrical energy to mechanical energy
D.
None of the above
6/9
A.
B.
C.
D.
40.
Full form of PPE
A.
Power point equipment
B.
Personal protective equipment
C.
Private power equipment
D.
Private power energy
PPE
A.
B.
C.
D.
41.
The fuse works
A.
Faraday's law
B.
Heating principle
C.
Ohm's law
D.
Magnetic principle
A.
B.
C.
D.
42.
Function of a yoke in 3-phase induction motor is
A.
To generate electric power
B.
To protect motor from dust
C.
To generate mechanical power
D.
None of the above
A.
B.
C.
D.
43.
3-Phase wound rotor motors are also called motors.
A.
Synchronous
B.
Slip ring
C.
Series
D.
Commutator
A.
B.
C.
D.
44.
The stator winding of a 3-phase induction motor is of
A.
Star
B.
Delta
C.
or
D.
None of the above
A.
B.
C.
D.
45.
A single-phase induction motor employs rotor.
A.
Squirrel cage
B.
Wound
C.
Either or
D.
None of the above
A.
B.
C.
D.
46.
Rating of Induction motor is given in terms
A.
kVA
B.
Hp
C.
kVAR
D.
None of the above
A.
kVA
B.
Hp
C.
kVAR
D.
47.
In 1-phase induction motor, speed-sensitive centrifugal switch is connected in winding.
A.
Parallel with main
B.
Series with main
C.
Series with starting
D.
Parallel with starting
7/9
A.
B.
C.
D.
48.
A capacitor-start, capacitor-run motor
A.
Low power factor
B.
High power factor
C.
Low efficiency
D.
None of the above
A.
B.
C.
D.
49.
A transformer will work
A.
A.C. only
B.
D.C. only
C.
A.C. as well as D.C.
D.
None of the above
A.
B.
C.
D.
50.
Rating of transformer is given in terms
A.
kVA
B.
kW
C.
kVAR
D.
Hp
A.
kVA
B.
kW
C.
kVAR
D.
Hp
51.
A transformer is
A.
Static device
B.
Rotating device
C.
Both
D.
None of the above
A.
B.
C.
D.
52.
A transformer transfers electrical energy from primary to secondary usually without change in
A.
Frequency
B.
Current
C.
Voltage
D.
None of the above
A.
B.
C.
D.
53.
The voltage per turn of the primary of a transformer is the voltage per turn of the secondary.
A.
More than
B.
Less than
C.
The same as
D.
None of the above
A.
B.
C.
D.
54.
A transformer which has no losses is
A.
An ideal transformer
B.
A practical transformer
C.
Both
D.
None of the above
A.
B.
C.
D.
55.
The open circuit test on a transformer gives
A.
Copper losses
B.
Frictional losses
C.
Iron losses
D.
Total losses
A.
B.
8/9
C.
D.
56.
of transformer are not constant
A.
Copper loss
B.
Iron loss
C.
Both
D.
None of the above
A.
B.
C.
D.
57.
1-phase Core type transformer has limbs.
A.
1
B.
3
C.
2
D.
4
A.
B.
C.
D.
58.
1-Phase Auto transformer winding.
A.
1
B.
4
C.
2
D.
3
A.
B.
C.
D.
59.
Which single phase motor is used in tape recorders?
A.
Hysteresis motor
B.
Shaded pole motor
C.
Universal motor
D.
Reluctance motor
A.
B.
C.
D.
60.
One of the characteristics of a single phase motor is that
A.
Requires only one winding
B.
Is not self starting
C.
Is self starting
D.
None of the above
A.
B.
C.
D.
61.
The main function of the starter used in induction motor is
A.
To start the motor
B.
To limit the starting current
C.
To control the speed
D.
Improve the power factor
A.
B.
C.
D.
62.
The main function of the capacitor in ceiling fan is to
A.
Start the fan
B.
Increase the efficiency
C.
Improve the power factor
D.
Protect the fan
A.
B.
C.
D.
63.
Which of the following are protective device?
A.
MCB
B.
Fuse
C.
ELCB
D.
All of the above
A.
MCB
B.
C.
ELCB
D.
64.
Full form of HRC fuse.
A.
High Rupturing Capacity
B.
High Resistance Capacitance.
9/9
C.
High Resistance Current.
D.
High Reluctance Current.
HRC
A.
B.
C.
D.
65.
The main function of the salt used in earthing
A.
Absorb the moisture
B.
To Provide the Protection.
C.
Increase conductance.
D.
Reduce the Conductance.
A.
B.
C.
D.
66.
The Full from of ELCB.
A.
Energy Loading Circuit Breaker.
B.
Earth Loading Circuit Breaker.
C.
Energy Leakage Circuit Breaker.
D.
Earth Leakage Circuit Breaker.
ELCB
A.
B.
C.
D.
67.
Which of the following material is not part of MCB
A.
Starter
B.
Spring
C.
Bi -metallic strip
D.
Heating resistance.
A.
B.
C.
D.
68.
Resistance
A.
Current
B.
E.M.F.
C.
Flux
D.
Power
A.
B.
C.
D.
69.
Reluctance
A.
Frequency
B.
Flux
C.
Current
D.
Voltage
A.
B.
C.
D.
70.
The short circuit test on a transformer gives
A.
Copper losses
B.
Hysteresis losses
C.
Iron losses
D.
Total losses
A.
B.
C.
D.
Seat No.: Enrolment
GUJARAT TECHNOLOGICAL UNIVERSITY
DIPLOMA ENGINEERING- C to D Bridge Course Examination WINTER 2018
Subject Code: C320901 Date: 04-01-2019
Subject Name: Basic Of Electrical Engineering
Time: 02:30 PM TO 04:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Each question is of 1 mark.
4. Use of only simple calculator is permitted. (Scientific/Higher Version not allowed).
5. English version is authentic.
No.
Question Text and Option.
1.
The SI unit of
A.
Henry
B.
Warr-hour
C.
Watt
D.
AT
SI
A.
B.
C.
D.
2.
A resistance of 230 volt, 50 watt bulb will
A.
529
B.
52
C.
1058
D.
105
A.
B.
C.
D.
3.
An A.C. current given by i=100 sinωt has maximum value of____amperes.
A.
100
B.
14.14
C.
1
D.
7.07
sinωt
A.
B.
C.
D.
4.
Fleming's left hand rule is used to find the direction
A.
Current
B.
Force
C.
E.M.F
D.
None of the above
A.
B.
C.
D.
5.
The p.f of an purely Resistive circuit is
A.
Often zero
B.
Between zero and 1
C.
Always unity
D.
Between zero and
A.
B.
C.
D.
6.
The p.f of an R-C circuit is
A.
Often zero
B.
Between zero and 1
C.
Always unity
D.
Between zero and
R-C
A.
B.
C.
D.
2/9
7.
The instrument which measure voltage is known as
A.
Ammeter
B.
Voltmeter
C.
Wattmeter
D.
Galvanometer
A.
B.
C.
D.
8.
The Peak factor is
A.
Maximum value rms value
B.
Rms value average value
C.
Average value rms value
D.
None of the above
A.
B.
C.
D.
9.
Cosine of the angle between voltage vector and current vector is known as
A.
Power
B.
Resistance
C.
Power factor
D.
Voltage
A.
B.
C.
D.
10.
The value of Peak factor is
A.
1.11
B.
11
C.
1.1
D.
1.414
A.
B.
C.
D.
11.
Fleming's right hand rule is used to find the direction
A.
Current
B.
Force
C.
E.M.F.
D.
None of the above
A.
B.
C.
D.
12.
The power taken by a 3 phase load is given by
A.
3 VL IL sinø
B.
√3 VL IL sinø
C.
3 VL IL cosø
D.
√3 VL IL cosø
A.
3 VL IL sinø
B.
√3 VL IL sinø
C.
3 VL IL cosø
D.
√3 VL IL cosø
13.
The resistance of a wire depends
A.
Cross sectional area
B.
Material
C.
Length
D.
All of the above
A.
B.
C.
D.
14.
The resistance of a straight conductor is independent
A.
Temperature
B.
Material
C.
Cross-sectional area
D.
Shape of cross-section
A.
B.
C.
D.
15.
The area of hysteresis loop
A.
Eddy current loss
B.
Iron loss
C.
Hysteresis loss
D.
Copper loss
3/9
A.
B.
C.
D.
16.
Insulators have temperature co-efficient of resistance.
A.
Positive
B.
Zero
C.
Negative
D.
None of the above
A.
B.
C.
D.
17.
An A.C. circuit usually has as the load.
A.
Resistance
B.
Inductance
C.
Capacitance
D.
All of the above
A.
B.
C.
D.
18.
Weber is the unit
A.
Energy
B.
Power
C.
Electric charge
D.
Flux
A.
B.
C.
D.
19.
Relative permeability of air
A.
1
B.
C.
× 10-7
D.
0
A.
B.
C.
×
D.
20.
The value of form factor is
A.
0
B.
10
C.
1
D.
1.11
A.
0
B.
C.
D.
21.
In, India the value of supply frequency of electricity is
A.
50 Hz
B.
25 Hz
C.
60 Hz
D.
10 Hz
A.
Hz
B.
Hz
C.
Hz
D.
Hz
22.
Full form of MCB
A.
Miniature coil breaker
B.
Mounted circuit board
C.
Minimum current board
D.
Miniature circuit breaker
MCB
A.
B.
C.
D.
23.
A fuse wire is a wire
A.
High resistance and low melting point
B.
High resistance and high melting point
4/9
C.
Low resistance and low melting point
D.
Low resistance and high melting point
A.
B.
C.
D.
24.
Lamps used for house lighting are connected
A.
Series
B.
Parallel
C.
Series-Parallel
D.
None of the above
A.
B.
C.
D.
25.
Which relationship is incorrect
A.
VR
B.
V=IR
C.
D.
A.
VR
B.
V=IR
C.
D.
26.
Hysteresis loop is drawn
A.
B H
B.
P E
C.
V I
D.
None of the above
A.
B H
B.
P E
C.
V I
D.
27.
Power consumed by purely capacitive circuit
A.
V I
B.
VI cosø
C.
I 2 R
D.
Zero
A.
V I
B.
VI cosø
C.
I 2 R
D.
28.
The material used for the core of a good relay should have hysteresis loop.
A.
Large
B.
Very large
C.
Narrow
D.
None of the above
A.
B.
C.
D.
29.
For three phase delta connection____
A.
VL =VPh
B.
VL √3VPh
C.
IL IPh
D.
IL 3IPh
A.
VL =VPh
B.
VL √3VPh
C.
IL IPh
D.
IL 3IPh
30.
Frequency is the inverse of
A.
Voltage
B.
Power
C.
Current
D.
Time period
A.
B.
C.
D.
31.
For three phase star connection____
A.
VL =VPh
B.
VL 3VPh
C.
IL IPh
D.
IL 3IPh
5/9
A.
VL =VPh
B.
VL 3VPh
C.
IL IPh
D.
IL 3IPh
32.
The E.M.F. induced in a coil of N turns is given
A.
dø/dt
B.
N dø/dt
C.
dø/dt
D.
N dt/dø
N
A.
dø/dt
B.
N dø/dt
C.
dø/dt
D.
N dt/dø
33.
In A.C circuit inductive reactance is given
A.
XL
B.
X L 2πfL
C.
X C=2πfc
D.
R L 2πfLC
A.
XL
B.
X L 2πfL
C.
X C=2πfc
D.
R L 2πfLC
34.
For the average value of current which equation is true
A.
Iav 0.637 Im
B.
Iav =0.367Im
C.
Iav 0.673Im
D.
Iav 0.736 Im
A.
Iav 0.637 Im
B.
Iav =0.367Im
C.
Iav 0.673Im
D.
Iav 0.736 Im
35.
Which of the following equation is true R.M.S value
A.
Irms =Im
B.
Irms =Im /√2
C.
Im=Irms /√2
D.
Irms =√2Im
A.
Irms m
B.
Irms m /√2
C.
Im=I rms /√2
D.
Irms =√2I m
36.
To reduce eddy current loss armature of a machine
A.
Laminated
B.
Silicon steel is used
C.
Both
D.
None of the above
A.
B.
C.
D.
37.
Power consumed by purely resistive circuit
A.
VI
B.
VI cosø
C.
Zero
D.
VI sinø
A.
VI
B.
VI cosø
C.
D.
VI sinø
38.
Which of the following is considered as PPE?
A.
Helmets
B.
Generator
C.
Motor
D.
All of the above
PPE
A.
B.
C.
D.
39.
A Generator is used to
A.
Change mechanical energy to electrical energy
B.
Increase energy into it
C.
Change electrical energy to mechanical energy
D.
None of the above
6/9
A.
B.
C.
D.
40.
Full form of PPE
A.
Power point equipment
B.
Personal protective equipment
C.
Private power equipment
D.
Private power energy
PPE
A.
B.
C.
D.
41.
The fuse works
A.
Faraday's law
B.
Heating principle
C.
Ohm's law
D.
Magnetic principle
A.
B.
C.
D.
42.
Function of a yoke in 3-phase induction motor is
A.
To generate electric power
B.
To protect motor from dust
C.
To generate mechanical power
D.
None of the above
A.
B.
C.
D.
43.
3-Phase wound rotor motors are also called motors.
A.
Synchronous
B.
Slip ring
C.
Series
D.
Commutator
A.
B.
C.
D.
44.
The stator winding of a 3-phase induction motor is of
A.
Star
B.
Delta
C.
or
D.
None of the above
A.
B.
C.
D.
45.
A single-phase induction motor employs rotor.
A.
Squirrel cage
B.
Wound
C.
Either or
D.
None of the above
A.
B.
C.
D.
46.
Rating of Induction motor is given in terms
A.
kVA
B.
Hp
C.
kVAR
D.
None of the above
A.
kVA
B.
Hp
C.
kVAR
D.
47.
In 1-phase induction motor, speed-sensitive centrifugal switch is connected in winding.
A.
Parallel with main
B.
Series with main
C.
Series with starting
D.
Parallel with starting
7/9
A.
B.
C.
D.
48.
A capacitor-start, capacitor-run motor
A.
Low power factor
B.
High power factor
C.
Low efficiency
D.
None of the above
A.
B.
C.
D.
49.
A transformer will work
A.
A.C. only
B.
D.C. only
C.
A.C. as well as D.C.
D.
None of the above
A.
B.
C.
D.
50.
Rating of transformer is given in terms
A.
kVA
B.
kW
C.
kVAR
D.
Hp
A.
kVA
B.
kW
C.
kVAR
D.
Hp
51.
A transformer is
A.
Static device
B.
Rotating device
C.
Both
D.
None of the above
A.
B.
C.
D.
52.
A transformer transfers electrical energy from primary to secondary usually without change in
A.
Frequency
B.
Current
C.
Voltage
D.
None of the above
A.
B.
C.
D.
53.
The voltage per turn of the primary of a transformer is the voltage per turn of the secondary.
A.
More than
B.
Less than
C.
The same as
D.
None of the above
A.
B.
C.
D.
54.
A transformer which has no losses is
A.
An ideal transformer
B.
A practical transformer
C.
Both
D.
None of the above
A.
B.
C.
D.
55.
The open circuit test on a transformer gives
A.
Copper losses
B.
Frictional losses
C.
Iron losses
D.
Total losses
A.
B.
8/9
C.
D.
56.
of transformer are not constant
A.
Copper loss
B.
Iron loss
C.
Both
D.
None of the above
A.
B.
C.
D.
57.
1-phase Core type transformer has limbs.
A.
1
B.
3
C.
2
D.
4
A.
B.
C.
D.
58.
1-Phase Auto transformer winding.
A.
1
B.
4
C.
2
D.
3
A.
B.
C.
D.
59.
Which single phase motor is used in tape recorders?
A.
Hysteresis motor
B.
Shaded pole motor
C.
Universal motor
D.
Reluctance motor
A.
B.
C.
D.
60.
One of the characteristics of a single phase motor is that
A.
Requires only one winding
B.
Is not self starting
C.
Is self starting
D.
None of the above
A.
B.
C.
D.
61.
The main function of the starter used in induction motor is
A.
To start the motor
B.
To limit the starting current
C.
To control the speed
D.
Improve the power factor
A.
B.
C.
D.
62.
The main function of the capacitor in ceiling fan is to
A.
Start the fan
B.
Increase the efficiency
C.
Improve the power factor
D.
Protect the fan
A.
B.
C.
D.
63.
Which of the following are protective device?
A.
MCB
B.
Fuse
C.
ELCB
D.
All of the above
A.
MCB
B.
C.
ELCB
D.
64.
Full form of HRC fuse.
A.
High Rupturing Capacity
B.
High Resistance Capacitance.
9/9
C.
High Resistance Current.
D.
High Reluctance Current.
HRC
A.
B.
C.
D.
65.
The main function of the salt used in earthing
A.
Absorb the moisture
B.
To Provide the Protection.
C.
Increase conductance.
D.
Reduce the Conductance.
A.
B.
C.
D.
66.
The Full from of ELCB.
A.
Energy Loading Circuit Breaker.
B.
Earth Loading Circuit Breaker.
C.
Energy Leakage Circuit Breaker.
D.
Earth Leakage Circuit Breaker.
ELCB
A.
B.
C.
D.
67.
Which of the following material is not part of MCB
A.
Starter
B.
Spring
C.
Bi -metallic strip
D.
Heating resistance.
A.
B.
C.
D.
68.
Resistance
A.
Current
B.
E.M.F.
C.
Flux
D.
Power
A.
B.
C.
D.
69.
Reluctance
A.
Frequency
B.
Flux
C.
Current
D.
Voltage
A.
B.
C.
D.
70.
The short circuit test on a transformer gives
A.
Copper losses
B.
Hysteresis losses
C.
Iron losses
D.
Total losses
A.
B.
C.
D.
Other Question Papers
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