# Technical helper mains most question answer 2022

Technical helper mains most question answer 2022 1. At a high value of slip, the torque of a three phase induction motor is _____.

A. Inversely proportional to slip

B. Zero

C. Unity

D. Directly proportional to slip

उच्च स्लिप के साथ 3 फेज प्रेरण मोटर का टॉर्क….

A. स्लिप के व्युत्क्रमानुपाती होता है

B. शून्य

C. इकाई

D. स्लिप के सीधे समानुपातिक

Ans A

2. Form factor for a sinusoidal wave is given by _____.

सिनुसोइडल वेव का आकृति गुणक कैसे दिया जाता है

A. 1.110

B. 1.414

C. 1.732

D. 1.5

A 3. Time constant of an RL circuit with R=2 Ω and L=10 H are given by ____.

10 हेनरी तथा 2 ओम प्रतिरोध के साथ RL सर्किट का समय स्थिरांक…

A. 2 sec

B. 5 sec

C. 10 sec

D. 3 sec

B

4.  A single phase induction motor with single winding has ______.

Ans A. Zero starting torque

B. Unity stating torque

C. Very high starting torque

D. Very low starting torque

A

5.  Full load regulation of four transformers with same power rating are 40%, 20%, 10% and

80% respectively. Which one should be recommended for obtaining better performance?

Ans A. 20%

B. 80%

C. 10%

D. 40%

A

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6. The maximum rate at which the amplifier output can change in an operational amplifier is

referred to as _____.

Ans A. Frequency rate

B. Signal rate

C. Slew rate

D. baud rate

C

7.Which of the following is used to prevent hunting in a synchronous machine?

Ans A. Field windings

B. Armature windings

C. Equalizer rings

D. Damper windings

D

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8.  In d.c. generators, armature reaction is produced by ____.

Ans A. Damper winding current

B. Field current

C. Interpole winding current

D. Armature current

D

9. The eddy current loss in an electrical machine is ____.

Ans A. Proportional to the square root of the frequency

B. Proportional to the square of the frequency

C. Independent of the frequency

D. Proportional to the frequency

B

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10.Average emf per turn in a transformer with standard notations is ______.

4¢f volt

11. Which is a active component? | एक सकिय घटक कौन सा है?

A Inductor | प्रारंभ करने वाला

B Resistor | रोकनेवािा

C Capacitor | संधाररत्र

D Transistor | ट्ांक्जस्टर

D

Rajasthan gk technical helper mains 2022 पुरूष स्त्रियों के वस्त्र एवं आभूषण

12. Which letter indicates the compound material

A A

B B

C C

D R

13. The second orbit of an atom contains 6 electrons. If it’s atomic mass is 17, then the number

of protons in it’s nucleus will be:

Ans A. 6

B. 8

C. 9

D. 17

B

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14. A piece of gold has a resistance of 0.8 ohm. Find the resistance of a wire of the same size

and resistivity 25 times that of gold.

Ans A. 0.8 ohm

B. 20 ohm

C. 31.25 ohm

D. 0.032 ohm

B

15. Two parallel conductors carrying current in the same direction:

Ans A. experiences no force

B. attract each other

C. repel each other

D. sometimes attract and sometime repel

B

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16. The direction of magnetic lines of force is:

Ans A. from N to S pole

B. not fixed

C. have no direction

D. from S to N pole

A

17. Which among the following has highest permeability?

Ans A. air

B. diamagnetic materials

C. ferromagnetic materials

D. paramagnetic materials

C

18. Curie temperature is the temperature at which the magnetic material:

Ans A. starts magnetizing

B. behaves like insulators

C. looses their magnetism

D. fully magnetized

C

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19. Germanium atom contains _____ valance electrons.

Ans A. 4

B. 6

C. 2

D. 8

A

20. The phenomenon of lagging of flux density behind the magnetizing force is called as:

Ans A. Mmf

B. relative permeability

C. magnetic leakage

D. magnetic hysteresis

D

21. Time constant of a capacitive circuit is defined as the time taken by the voltage to rise to

______ times final value of the voltage.

Ans A. 0.5

B. 2.0

C. 0.632

D. 0.368

C

22. The power consumed by a pure inductance connected to an AC circuit is:

Ans A. very high

B. very low

C. Zero

D. Infinite

C

23. A cable having 3 strands each of gauge 20 SWG may be represented as:

Ans A. 3-20

B. 20/3

C. 3/20

D. 3/20 mm

C

24. The arrow head in a transistor symbol points in the direction of:

Ans A. electron flow in the emitter region

B. majority carrier flow in emitter region

C. minority carrier flow in emitter region

D. holes flow in the emitter region

D

25. Pendant holders are used in domestic installation, when the lamp is to be:

Ans A. fixed at an angle

B. fixed on board

C. fixed on wall

D. suspended vertically

D