Technical helper mains mcq 2022

Technical helper mains mcq 2022

Top 50 question ITI Electrician

Uprvunl tg2 question

Technical helper question pdf 2022

1. 100 V is applied t o a circuit where current flow is (10+j5)A. The active power will be

____.

Ans A. 1000 W

B. 100 W

C. 500 W

D. 1500 W

A

2. Diversit y f act or is generally _______.

Ans A. Equal to zero

B. Less than unity

C. Greater than unity

D. Equal to unity

C

3.  If t he capacitive react ance of t he circuit is 53.2 Ω and t he frequency is 60 Hz. The

capacit ance of t he circuit is _____.

Ans A. 50 µF

B. 50 F

C. 7 µF

D. 70 µF

A

4. Which of t he f ollowing is incorrect wit h respect t o concealed conduit wiring?

Ans A. No risk of shocks

B. Expensive as compared to surface conduit wiring

C. Ii is reliable and safe wiring system

D. Installation is easy

D

5. The load on each power sub circuit in electrical wiring should normaly t o restrict ed

t o _____.

Ans A. 3000 watts

B. 500 watts

C. 200 watts

D. 100000 watts

A

6. The electrical eart hing is done wit h t he help of ____.

Ans A. Low resistance wire connected between phase wire and ground

B. High resistance wire connected between non carrying current part of the equipment

and ground

C. Low resistance wire connected between non carrying current part of the equipment

and ground

D. High resistance wire connected between phase wire and ground

C

7. Find t he average value of t he current, I(t)=10+10π sin314t

Ans A. 20 Amp

B. 10 Amp

C. Zero Amp

D. 30 Amp

D

8. Which of t he f ollowing is not a t echnique of electrical wiring?

Ans A. Casing and Capping Wiring

B. Lead Sheathed Wiring

C. Hampton wiring

D. Batten Wiring

D

9. Penst ocks, valve, gat e, generat or are involved wit h _____.

Ans A. Nuclear Power

B. Hydro power

C. T hermal power

D. Fuel Cell

B

10. For maximum power transfer from source t o 5-j2 ohm of load, t he source

impedance will be ____.

Ans A. J2 ohm

B. -j2 0hm

C. 5+j2 ohm

D. 5 ohm

C

11. Which of t he f ollowing is not a part of t hermal power plant ?

Ans A. Superheater

B. Tailrace

C. Cooling tower

D. Condenser

B

12. Energy produced due t o gravit ational f orce of attraction bet ween eart h and moon

or sun and eart h is:

Ans A. Micro-hydel Energy

B. Fusion Energy

C. T idal Energy

D. Geothermal Energy

C

13. Considering adding impurities to semiconductors, what is the abbreviation for ‘ppm’?

Ans A. Parts Per Mass

B. Parts Per Milligram

C. Parts Per Million

D. Parts Per Microgram

C

14. Which of the following does not have the direct correlation with the resistivity of

electrical materials?

Ans A. Age hardening

B. Temperature

C. Alloying

D. Frequency

D

15. A 5 H coil is coupled with a 20 H coil. What could be the maximum value of mutual

inductance between them considering no flux linkage?

Ans A. 12.5 H

B. 5 H

C. 10 H

D. 25 H

C

16. ‘dielectric constant’ is mathematically equal to which of the following?

Ans A. Relative permittivity

B. Loss factor

C. Polarization

D. Relative permeability

A

17. Considering electromagnetic circuits, which of the following is unit less?

Ans A. Permeance

B. Reluctance

C. Relative permeability

D. Absolute permeability

C

18. In magnetic circuits, H = ______ per unit length of core.

Ans A. Flux density

B. Emf

C. mmf

D. Flux

C

19. Which of the following is the cheapest among others?

Ans A. Aluminium

B. Copper

C. Silver

D. Gold

A

20. A two-way switch technically is called as ______?

Ans A. DPST

B. TPST

C. SPDT

D. SPST

C

21. In case of internal wiring, which of the following is placed between incoming service

cable and energy meter?

Ans A. Cut-out

B. Fuse

C. Main switch

D. Distribution board

A

22. Which of the following is used to increase the acting head on the water wheel in a

hydro electric power plant?

Ans A. Surge tank

B. Reservoir

C. Draft tube

D. Penstock

C

23. What is VAWT considering wind turbine?

Ans A. Variable Area Wind Turbine

B. Volt Ampere Wind Turbine

C. Vertical Axis Wind Turbine

D. Variable Axis Wind Turbine

C

24. If the supply frequency increases, the inductive reactance will ______ and capacitive

reactance will ______.

Ans A. increase, decrease

B. decrease, decrease

C. decrease, increase

D. increase, increase

A

25. For any given electrical machine, which of the following equation is TRUE?

Ans A. Input = losses – output

B. Input = Output – losses

C. Output = Input – losses

D. Output = Input

C.

Pdf available here, download nowVK Mcq pdf

26 Which of the following is not an atomic fuel?

Ans A. Plutonium

B. Uranium

C. Thorium

D. Cadmium

D

27.  For which of the following power plant, the initial cost is so high and the mass

(quantity) of fuel required per MW of output produced is less?

Ans A. Gas power plant

B. Steam power plant

C. Diesel power plant

D. Nuclear power plant

D

28. Shaded pole motor belongs to which of the following family of motors?

Ans A. DC motors

B. Three phase induction motors

C. Three phase Synchronous motors

D. Single phase induction motors

D

29. Stator of which of the following motors is similar?

Ans A. Induction motor and DC motor

B. Induction motor and synchronous motor

C. Synchronous motor and DC motor

D. Induction motor and stepper motor

B

30. For a short-pitched synchronous machine, (distribution factor) × (pitch factor) is

______?

Ans A. always 0

B. always equal to 1

C. always less than 1

D. always greater than 1

C

31. State TRUE/FALSE for following statements:

1. A synchronous motor is a doubly excited machine.

2. Rotor poles of synchronous motor are excited by direct current.

Ans A. False, False

B. True, True

C. False, True

D. True, False

B

32. MT1, MT2 and GATE are the terminals of which of the following power electronics

device?

Ans A. DIAC

B. SCR

C. GTO

D. TRIAC

D

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33. Microphone is used at ______, and loud speaker is used at ______?

Ans A. transmitting end, receiving end

B. receiving end, transmitting end

C. receiving end, receiving end

D. transmitting end, transmitting end

A

34. State TRUE / FALSE for the following statements:

1. An indoor sub-station is less expensive than outdoor sub-station.

2. Fault location is easier in an outdoor sub-station than in indoor sub-station.

Ans A. False, True

B. False, False

C. True, False

D. True, True

A

35. Which of the following is not a characteristic of a transformer?

Ans A. Windings are electrically coupled

B. Rugged in construction

C. It has NO moving parts

D. Very high efficiency

A

36. Which of the following is an electromagnetic transducer?

Ans A. Solar cell

B. Generator

C. Fuel cell

D. Thermocouple

B

37. Considering installation of transmission and distribution equipment, what is ‘ROW’?

Ans A. Red Or White

B. Right Or Wrong

C. Right Of Warning

D. Right Of Way

D

38. In MCCB, the alphabet ‘M’ stands for, which of the following?

Ans A. Mini

B. Miniature

C. Mono

D. Moulded

D

39. How many types of circuit breakers are available based on the arc quenching medium

used?

Ans A. 2

B. 5

C. 3

D. 4

D

40. For which of the following type of motor, least maintenance is required?

Ans A. DC motor

B. Three phase squirrel cage motor

C. Three Phase Synchronous motor

D. Three phase slip ring induction motor

B

41. Which of the following effect is NOT related to transmission of electrical

power/overhead transmission?

Ans A. Stroboscopic effect

B. Ferranti effect

C. Skin effect

D. Proximity effect

A