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Question 501

RRB JE 2026• Technical Abilities

A low demand factor in an electrical installation indicates that:

  1. AOption (a)

    Connected electrical load is much greater than maximum power demand

  2. BOption (b)

    Maximum electrical demand exceeds total connected electrical load capacity

  3. COption (c)

    Average electrical load remains equal to maximum system demand continuously

  4. DOption (d)

    Individual consumer demands occur simultaneously during system operation

View answer & explanation

Correct answer

Answer: (a)A.

Connected electrical load is much greater than maximum power demand

Explanation not yet available.

Question 502

RRB JE 2026• Technical Abilities

A limitation of Buchholz relay protection is:

  1. AOption (a)

    Detection of incipient faults inside oil immersed transformers effectively

  2. BOption (b)

    Fast isolation of internal transformer faults during abnormal conditions

  3. COption (c)

    Automatic detection of gas accumulation inside transformer oil systems

  4. DOption (d)

    Operation possible only in transformers provided with conservator tanks

View answer & explanation

Correct answer

Answer: (a)A.

Detection of incipient faults inside oil immersed transformers effectively

Explanation not yet available.

Question 503

RRB JE 2026• Technical Abilities

Which point or region represents the Pull-out Torque in the shown torque-speed characteristic of a 3-phase induction motor?

  1. AOption (a)

    Point c

  2. BOption (b)

    Anywhere between point a and b

  3. COption (c)

    Point b

  4. DOption (d)

    Point a

View answer & explanation

Correct answer

Answer: (a)A.

Point c

Explanation not yet available.

Question 504

RRB JE 2026• Technical Abilities

In seam welding, the electrodes are made of _______.

  1. AOption (a)

    copper alloys

  2. BOption (b)

    aluminium

  3. COption (c)

    brass

  4. DOption (d)

    tungsten

View answer & explanation

Correct answer

Answer: (a)A.

copper alloys

Explanation not yet available.

Question 505

RRB JE 2026• Technical Abilities

Where is the shading coil placed in a shaded-pole motor?

  1. AOption (a)

    On the motor bearings

  2. BOption (b)

    On the rotor shaft

  3. COption (c)

    On the air-gap surface only

  4. DOption (d)

    On a portion of the stator pole

View answer & explanation

Correct answer

Answer: (a)A.

On the motor bearings

Explanation not yet available.

Question 506

RRB JE 2026• Technical Abilities

Which of the following statements about the atomic hydrogen arc welding process is correct?

  1. AOption (a)

    It employs two non-consumable tungsten electrodes to create an arc in a hydrogen atmosphere.

  2. BOption (b)

    It requires two non-consumable tungsten electrodes and an oxygen-rich atmosphere.

  3. COption (c)

    It utilizes a single carbon electrode to generate heat in hydrogen atmosphere.

  4. DOption (d)

    It works with a consumable iron electrode in a hydrogen atmosphere.

View answer & explanation

Correct answer

Answer: (a)A.

It employs two non-consumable tungsten electrodes to create an arc in a hydrogen atmosphere.

Explanation not yet available.

Question 507

RRB JE 2026• Technical Abilities

The curve obtained in the input characteristics of a BJT in common-emitter (CE) configuration is _______.

  1. AOption (a)

    Similar to a reverse breakdown curve

  2. BOption (b)

    A horizontal straight line

  3. COption (c)

    Linear for all voltages

  4. DOption (d)

    Similar to a forward diode curve

View answer & explanation

Correct answer

Answer: (a)A.

Similar to a reverse breakdown curve

Explanation not yet available.

Question 508

RRB JE 2026• Technical Abilities

The output of an alternator is taken from the:

  1. AOption (a)

    Commutator

  2. BOption (b)

    Stator winding

  3. COption (c)

    Field winding

  4. DOption (d)

    Rotor winding

View answer & explanation

Correct answer

Answer: (a)A.

Commutator

Explanation not yet available.

Question 509

RRB JE 2026• Technical Abilities

A 12μF capacitor and a 4μF capacitor are connected in series. The ratio of voltages across them will be:

  1. AOption (a)

    3:1

  2. BOption (b)

    4:1

  3. COption (c)

    1:3

  4. DOption (d)

    1:4

View answer & explanation

Correct answer

Answer: (a)A.

3:1

Explanation not yet available.

Question 510

RRB JE 2026• Technical Abilities

Three impedances, each of (3−4j) Ω, are connected in delta to a 200 V, three-phase, 50 Hz balanced supply. What are the values of line current and phase current, respectively, in the delta-connected load?

  1. AOption (a)

    40√3 A and 40 A

  2. BOption (b)

    40 A and 40√3 A

  3. COption (c)

    40 A and 40 A

  4. DOption (d)

    40√3 A and 40√3 A

View answer & explanation

Correct answer

Answer: (a)A.

40√3 A and 40 A

Explanation not yet available.
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