Preparing for the RRB Group D Exam 2026 requires consistent practice and a clear understanding of the latest exam pattern RRB Group D Exam 2026 MCQs Practice Set 10 is designed to help candidates strengthen their preparation through carefully selected General Knowledge questions Whether you are appearing for your first Railway exam or revising before the CBT this practice set will help you assess your knowledge and improve your confidence.

This practice set contains 25 important General Knowledge (GK) MCQs based on topics that are frequently asked in Railway Group D examinations The questions cover important areas such as Indian History, Geography, Polity, General Science, Current Affairs, Economy and Static GK Practicing these questions regularly will help you become familiar with the type of questions commonly seen in competitive exams.

Each question is prepared in a simple and easy-to-understand format, making it suitable for both beginners and experienced aspirants. After completing the mock test review your answers carefully to identify your strengths and improve weaker areas Regular practice not only improves accuracy but also enhances your speed and time management during the actual examination.

If you are aiming to secure a good score in the Railway Group D CBT Exam 2026 make this RRB Group D Exam 2026 MCQs Practice Set 10 a part of your daily study routine Consistent practice, proper revision and a strong understanding of General Knowledge concepts will help you stay ahead in the competition and increase your chances of success.

RRB Group D Exam 2026 Practice SET 10 for Railway Group D CBT Exam

Q. What is a light-year a unit of?

(A) Time
(B) Distance
(C) Velocity
(D) Mass

Answer: (B) Distance

Q. At what temperature (°C) does water boil?

(A) 0°C
(B) 50°C
(C) 100°C
(D) 212°C

Answer: (C) 100°C

Q. What causes the change of seasons on Earth?

(A) The spherical shape of the Earth
(B) The tilt of the Earth’s axis and its revolution around the Sun
(C) The Moon’s gravity
(D) The size of the Sun

Answer: (B) The tilt of the Earth’s axis and its revolution around the Sun

Q. Who was the inventor of electricity?

(A) Michael Volta James
(B) Benjamin Franklin
(C) Thomas Edison
(D) James Clerk Maxwell

Answer: (B) Benjamin Franklin

Q. Which part of the brain controls the heart?

(A) Spinal cord
(B) Medulla oblongata
(C) Nerve cell (Neuron)
(D) Liver

Answer: (B) Medulla oblongata

Q. In which organ of our body is hydrochloric acid (HCl) found?

(A) Mouth
(B) Intestine
(C) Stomach
(D) Liver

Answer: (C) Stomach

Q. What is the main source of the Sun’s energy?

(A) Combustion
(B) Nuclear fusion
(C) Nuclear fission
(D) Radioactivity

Answer: (B) Nuclear fusion

Q. What is the average lifespan of red blood cells (RBCs)?

(A) 60 days
(B) 90 days
(C) 120 days
(D) 180 days

Answer: (C) 120 days

Q. What causes rusting of iron?

(A) Nitrogen
(B) Hydrogen
(C) Oxygen and moisture
(D) Carbon dioxide

Answer: (C) Oxygen and moisture

Q. Which vitamin is obtained from sunlight?

(A) Vitamin A
(B) Vitamin B
(C) Vitamin C
(D) Vitamin D

Answer: (D) Vitamin D

Q. What is the uppermost layer of the Earth called?

(A) Mantle
(B) Crust
(C) Core
(D) Asthenosphere

Answer: (B) Crust

Q. Which metals are known as “noble metals” due to their occurrence in a pure state in nature and their stability?

(A) Gold and platinum
(B) Copper
(C) Iron
(D) Silver

Answer: (A) Gold

Q. What is the full form of DNA?

(A) Deoxyribonucleic Acid
(B) Double Nuclear Acid
(C) Dinucleic Acid
(D) Dichloro Nucleic Acid

Answer: (A) Deoxyribonucleic Acid

Q. Which of the following is the heaviest gas?

(A) Helium
(B) Hydrogen
(C) Radon
(D) Oxygen

Answer: (C) Radon

Q. At 20°C, the speed of sound in water is approximately:

(A) 1500 m/s
(B) 300 m/s
(C) 1200 m/s
(D) 340 m/s

Answer: (A) 1500 m/s

Q. What is the liquid part of blood called?

(A) Plasma
(B) RBC
(C) WBC
(D) Hemoglobin

Answer: (A) Plasma

Q. Which substance is used in a thermometer?

(A) Water
(B) Alcohol
(C) Mercury
(D) Oil

Answer: (C) Mercury

Q. Which particle in an atom is negatively charged?

(A) Proton
(B) Electron
(C) Neutron
(D) Nucleus

Answer: (B) Electron

Q. By which process do green plants make food?

(A) Respiration
(B) Photosynthesis
(C) Excretion
(D) Transpiration

Answer: (B) Photosynthesis

Q. What is the SI unit of mass?

(A) Gram
(B) Kilogram
(C) Pound
(D) Ton

Answer: (B) Kilogram

Q. What is nitrogen used for?

(A) Filling balloons
(B) Making fertilizers
(C) Making fuel
(D) Cleaning jewelry

Answer: (B) Making fertilizers

Q. Which is the smallest bone?

(A) Femur
(B) Stapes
(C) Radius
(D) Tibia

Answer: (B) Stapes

Q. What causes the conversion of milk into curd?

(A) Bacteria
(B) Virus
(C) Fungus
(D) Algae

Answer: (A) Bacteria

Final Words

Regular practice is the key to success in the RRB Group D CBT Exam 2026 Solve these 25 General Knowledge MCQs analyze your mistakes and keep revising important topics regularly With consistent effort and the right preparation strategy you can improve your performance and move one step closer to achieving your Railway exam goal.