SEKHAR LEARN

Electrical engineering is the study of electrons and electrical. We are sharing the 50 best required electrical engineering questions to prepare for.

Q1 – For which reason the armature of a dc motor is laminated?

To reduce the eddy current losses.

Q2 – In a transmission system ground wire is used in

To connect a circuit conductor or other devices to an earth plate.

Q3 – The top most wire in a distribution line is

Earth wire is the top most wire in a distribution line.

Q4 – What is the main function of a Relay

Fault Detection.

Q5 – Earth fault relays are

Non-directional relays.

Q6 – A wire placed on the top of a transmission line acts as

Ground Wire.

Q7 – In a generator, the frequency of emf generated depends upon its

Speed and number of poles.

Q8 – An ac generator running at 1,000 rpm produces emf of 50 Hz. The number of poles on the generator is

6.

Q9 – Power factor of an ordinary electric bulb is

Unity.

Q10 – The two essential conditions to be fulfilled for oscillations are

Amplification and Feedback.

Q11 – The power requirement of satellite is provided through

Solar Cells.

Q12 – Overcharging of lead acid batteries is likely to result in

Sedimentation.

Q13 – Cables of 220 KV lines are always

Compresses oil compressed gas insulated.

Q14 – Which conductor has the least electrical conductivity?

Lead.

Q15 – For a 33 kV cable what should be the minimum bending radius

30 times the diameter.

Q16 – What is it called, If a power amplifying feedback control system where the controlled variable is mechanical position or a time derivative of position as velocity or acceleration

Servomechanism.

Q17 – For a shunt generator, which loss is considered as constant

Copper Loss.

Q18 – By which element interpoles are generally wounded

Heavy gauge copper wire.

Q19 – The number of armature parallel paths in 12 pole DC generator provided with triple lap winding will be

36.

Q20 – When a generator is called flat compounded

The voltage remains constant irrespective of the load on the generator.

Q21 – Why a generator loses residual magnetism

Due to heating.

Q22 – In a lap wound DC generator, When P is the number of poles then the number of brushes will be equal to

P means number of poles.

Q23 – For long DC transmission lines which generator is best

Over compunded generator.

Q24 – Which DC motor is preferred to be used for cranes and hoists?

Series Motors.

Q25 – Speed control by Ward Leomard method is available

In both directions, below the rate speed and above the rated speed of the motor.

Q26 – What will happen if the back emf of a DC motor suddenly disappears?

The motor will run faster than the rated value

Q27 – Sparking at the commutator of a DC motor may result in

Shunt motor.

Q28 – For constant torque drive which speeds control method preferred

Shunted armature control.

Q29 – The basic DTL configuration is

NAND gate.

Q30 – A digital voltage has

Analog input and digital output.

Q31 – LCD represents

Liquid Crystal Display.

Q32 – What is the range of horsepower of diesel locomotive?

1500 to 2500.

Q33 – In tramways generally which motor used

DC Series Motor.

Q34 – The main difference between the speed time curve of the main line service as compared to the suburban services lies in

Longer free-running periods, Shorter acceleration and braking periods, and longer coasting periods.

Q35 – On which test of induction motor reduced voltage is applied

Blocked Rotor Test.

Q36 – The starting torque of slip ring induction motor can be increased by

Adding external resistance to the rotor.

Q37 – The slip of a slip ring induction motor can be changed by

Inserting resistance in the rotor circuit, Injecting Emfs in the rotor circuit, cascade connections.

Q38 – Which motor is mostly used in mines?

Air motors used for explosive gases exist.

Q39 – Magnetic lines of force are called

Flux.

Q40 – Which type of damping is mostly preferred in case of an instrument having a weak magnetic field?

Air friction damping.

Q41 – Which material is normally used for thermocouples

Chromel copel, platimum-rhodium, chromel-alumel.

Q42 – For absolute measurement of resistance, which method is used?

Lortentz method.

Q43 – What are the functions of insulating material

Preventing a short circuit between conducting wires.

Q44 – No load test on a transformer is performed for determining

Magnetizing current and loss.

Q45 – What is the necessary condition for the parallel operation of transformer?

They must operate at the same frequency.

Q46 – Which part of the transformer is subjected to maximum heating?

Winding.

Q47 – Auto transformer is used

When the transformation ratio is small.

Q48 – Short circuit test on transformer is performed for determining

Core losses.

Q49 – The surge resistance for overhead lines is

500 ohms.

Q50 – A 30 km transmission line carrying power ar 33kV is called

Short transmission line.

Above we have shared the 50 most important electrical engineering questions, which can help to understand the requirement for preparation in a detailed manner.

Also Read:- The best time to visit Grand Canyon,

Best required questions about hydro power plants in India