Science Question and Answer for Postal Assistant Exam

 Science Question and Answer for PA / SA Examination 2014

 1. Which of the following substances is not found in tobacco, smoking/inhaling of which may be dangerous for human beings?

(a) Nicotine
(b) Tar
(c) Carbon monoxide
(d) Ammonium sulphate
(e) None of these

2. Which vitamin keeps the eyes healthy?

(a) K
(b) B
(c) C
(d) D
(e) None of these

3. Which of the following gases forms the largest part of air?

(a) Carbon Dioxide
(b) Nitrogen
(c) Argon
(d) Oxygen
(e) Hydrogen

4. What is most commonly used substance in fluorescent tubes?

(a) Sodium oxide and argon
(b) Sodium vapour and neon
(c) Mercury vapour and argon
(d) Mercury oxide and neon

5. Which organ of the body never rests?

(a) Eyes
(b) Pancreas
(c) Liver
(d) Heart

6. What are the blood corpuscles that help to build up resistance against diseases?

(a) Leucocytes
(b) Monocytes
(c) Neutfrophils
(d) Lymphocytes

7. What principle/law explains the working of the hydraulic brakes in automobilies?

(a) Bernoulli s law
(b) Posieulle s principle
(c) Pascal s law
(d) Archimedes principle

8. What is milk of magnesia?

(a) Magnesium carbonate
(b) Sodium bicarbonate
(c) Calcium hydroxide
(d) Magnesium hydroxide

Answers:

1. (c) Carbon monoxide
2. (e) None of these
3. (b) Nitrogen
4. (c) Mercury vapour and argon
5. (d) Heart
6. (a) Leucocytes
7. (a) Bernoulli s law
8. (d) Magnesium hydroxide