NDA/NA SOLVED PAPER 2015-II (GENERAL KNOWLEDGE)

Total Questions: 100

1. A brass ball is tied to a thin wire and swung so as to move uniformly in a horizontal circle. Which of the following statements in this regard is/are true?

1. The ball moves with constant velocity
2. The ball moves with constant speed
3. The ball moves with constant acceleration
4. The magnitude of the acceleration of the ball is constant

Select the correct answer using the code given below:

Correct Answer: (d) 2 and 4 only
Solution:

Velocity is the vector quantity so it get changed as the direction changes. The ball will move with constant speed and magnitude of acceleration of the ball will also be constant.

2. Two long wires each carrying a d.c. current in the same direction are placed close to each other. Which one of the following statements is correct?

Correct Answer: (a) The wires will attract each other
Solution:

When wire carrying d.c. current in the same direction are placed close to each other, the wire will attract each other.

3. The first Indian Satellite, Aryabhatt, was launched in the year:

Correct Answer: (b) 1975

4. Which one of the following sea routes is the shortest from point to point?

Correct Answer: (d) Mumbai to Colombo

5. Which one of the following is not a Green House Gas?

Correct Answer: (b) Methane
Solution:

Green house gas consists of methane, water vapours, ozone and CFCs gases.

6. Muscle fatigue is due to the accumulation of:

Correct Answer: (b) Lactic acid
Solution:

Lactic acid is formed and accumulated in the muscle under conditions of high energy demand at the time of vigorous exercise and rapid fluctuations of the energy requirement and insufficient supply ofO₂

7. The absolute zero, i.e., temperature below which is not achievable, is about:

Correct Answer: (c) -273 °C
Solution:

At the physically impossible-to-reach temperature of zero kelvin, or minus 459.67 degrees Fahrenheit (minus 273.15 degrees Celsius), at which atoms would stop moving.

8. Lightning conductors are used to protect building from lightning strikes. Which of the following statements is / are true about lightning conductors?

1. Lightning conductors create an electric field at its top so that lightning strikes it preferentially
2. Lightning conductors reduce the effect of the strike by uniformly distributing the charge (current) over the surface of the building
3. Lightning conductors take all charge (current) to deep down in the earth
4. Lightning conductors must be installed at a place taller than the building

Select the correct answer using the code given below:

Correct Answer: (c) 1, 3 and 4
Solution:

Lightning conductor, is a good conductor of electric current, so it create an electric field at its top to attract lightning conduction (i.e., charge). It carries all charges to deep in the earth without harming the building. These conductors are installed at corners or sides walls taller than the walls so that lighting strikes these first.

9. Match List I with List II and select the correct answer using the code given below the Lists:

List I (Manufacturing site)List I (Industry)
A. Ludhiana1. Auto parts
B. Kanpur2. Woollen garments
C. Varanasi3. Leather
D. Vijayawada4. Handloom

Codes:

ABCD
(a)1432
(b)2341
(c)2431
(d)1342
Correct Answer: (b)

10. Which one of the following is not a sea port?

Correct Answer: (c) Diamond Harbour