Download PDF – RRB Group D 2025 Question Paper – 27 November Shift 1 | Set 1 (Q1–Q25) General Science

RRB Group D 2025 Question Paper – 27 November Shift 1 | Set 1 (Q1–Q25) General Science

Q1. Which of the following statements is correct?

A) Work done can only be negative.

B) Work done can be positive or negative depending on the direction of force.

C) Work done does not depend on force or displacement.

D) Work done can only be positive.

Answer: (B)

Work = F·s cosθ. Depending on direction of force, work can be positive or negative.

Q2. Through which method of cell division are the diploid chromosomes divided into haploid gametes?

A) Mitosis

B) Binary Fission

C) Amitosis

D) Meiosis

Answer: (D)

Meiosis reduces chromosome number from diploid (2n) to haploid (n).

Q3. The power of a lens is defined as:

A) The reciprocal of its focal length in meters

B) The ratio of image distance to object distance

C) The product of its focal length and refractive index

D) The square of its focal length

Answer: (A)

Power (P) = 1/f (in meters). Unit is dioptre.

Q4. When a thick glass slab is placed over printed matter, the letters appear raised. This is due to ___________.

A) Scattering of light

B) Refraction of light

C) Total internal reflection

D) Polarization of light

Answer: (B)

Refraction causes apparent shift making letters appear raised.

Q5. The motion of a satellite orbiting the Earth in a circular path at constant speed is a classic example of uniform circular motion. What property of this motion prevents its acceleration from being zero?

A) The total mechanical energy is conserved necessitating acceleration.

B) The direction of motion changes continuously at every point, meaning the velocity is changing.

C) The object's mass continually changes due to orbital dynamics.

D) The speed is too high for the gravitational force to sustain a constant velocity.

Answer: (B)

Acceleration exists because velocity direction changes continuously (centripetal acceleration).

Q6. Asthma primarily affects which part of the respiratory system?

A) Diaphragm

B) Bronchi and bronchioles

C) Trachea

D) Alveoli

Answer: (B)

Asthma causes inflammation and narrowing of bronchi and bronchioles.

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