RRB NTPC EXAM Study Notes General Awareness Part 3 #RRB #NTPC

1. Siphon will fail to work it

1. both its limbs are of unequal length
2. the temperature of the liquids in the two vessels are the same
3. the level of the liquid in the two vessels are at the same height
4. the densities of the liquid in the two vessels are equal

Answer :

Option 3

2. The nuclear reaction in which a heavy nucleus splits into two nuclei of nearly equal mass is called

1. Nuclear fusion
2. Nuclear fission
3. Nuclear reaction
4. Fast breeding

Answer :

Option 2

3. Which is true

1. In a static liquid at same horizontal level, pressure is more at centre
2. In a static liquid at same horizontal level, pressure is less at centre.
3. In a static liquid at same horizontal level, pressure is same at all points
4. In a static liquid at same horizontal level, pressure is different at all points

Answer :

Option 3

4. Which law is also called law of inertia ?

1. Newton first law
2. Newton second law
3. Newton third law
4. All of above

Answer :

Option 1

5. Radiocarbon is produced in the atmosphere as a result of

1. collision between fast neutrons and nitrogen nuclei present in the atmosphere
2. action of ultraviolet light from the sun on atmospheric oxygen
3. action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere
4. lightning discharge in atmosphere

Answer :

Option 1

6. What is newton third law of motion ?

1. Every body maintains its initial state rest or motion unless no external force is applied.
2. The rate of change in momentum of a body is directly proportional to the applied force on the body and takes place in the direction of force.
3. To every action there is equal and opposite reaction.
4. None of above.

Answer :

Option 3

Explanation:

Newton First Law of Motion : Every body maintains its initial state rest or motion unless no external force is applied.

Newton Second Law of Motion : The rate of change in momentum of a body is directly proportional to the applied force on the body and takes place in the direction of force.

7. unit of Pressure is

1. newton/ second
2. pascal
3. watt
4. newton per meter

Answer :

Option 2

Explanation:

newton second is unit of impulse,

watt is unit of Power,

newton per meter is unit of Surface Tension.

8. K. Macmillan invented

1. Bicycle
2. Barometer
3. Calculating Machine
4. Centigrade Scale

Answer :

Option 1

Explanation:

K. Macmillan of Scotland invented Bicycle in 1839.

Barometer was invented by E. Torricelli of Italy in 1644.

Calculating Machine was invented by Pascal of France in 1642.

Centigrade Scale was invented by A. Celsius of France in 1742.

9. Solar cell converts

1. Sound energy into electrical energy
2. Electrical energy into mechanical energy
3. Solar energy into electrical energy
4. Electrical energy into light energy

Answer :

Option 3

10. Force of attraction between the molecules of different substances is called

1. Surface tension
2. Cohensive force
3. Adhesive force
4. None of above

Answer :

Option 3

Explanation:

Cohensive force – Force of attraction between the molecules of same substance is called Cohensive force.