General Science · NDA previous year questions

A body weighs 5 kg on equator. At the poles it is likely to weigh

1. A.5 kg
2. B.less than 5 kg but not zero
3. C.0 kg
4. D.more than 5 kg

SONAR is mostly used by

1. A.Doctors
2. B.Engineers
3. C.Astronauts
4. D.Navigators

A bucket full of water is kept in a room and it cools from $75^{\circ }\text{C}$ to $70^{\circ }\text{C}$ in time $T_1$ minutes, from $70^{\circ }\text{C}$ to $65^{\circ }\text{C}$ in time $T_2$ minutes, and from $65^{\circ }\text{C}$ to $60^{\circ }\text{C}$ in time $T_3$ minutes, then

1. A.$T_1=T_2=T_3$
2. B.$T_1<T_2<T_3$
3. C.$T_1>T_2>T_3$
4. D.$T_1<T_3<T_2$

For a simple pendulum, the graph between ${\mathrm{T}}^2$ and L (where T is the time period & L is the length) is

1. A.straight line passing through origin
2. B.parabolic
3. C.circle
4. D.none of the above

Which of the following statements is/are correct? 1. Ligaments are highly flexible. 2. Ligaments connect muscles and bones. 3. Ligaments contain very little matrix. Select the correct answer using the code given below : Code :

1. A.1, 2 and 3
2. B.1 and 3 only
3. C.2 and 3 only
4. D.1 only

When a solid object is immersed in water, there is a loss in its weight. This loss is

1. A.equal to the weight of the water displaced
2. B.less than the weight of the water displaced
3. C.greater than the weight of the water displaced
4. D.not related to the weight of the water displaced

For a steel boat floating on a lake, the weight of the water displaced by the boat is

1. A.less than the weight of the boat
2. B.more than the weight of the boat
3. C.equal to the weight of the part of the boat which is below the water level of the lake
4. D.equal to the weight of the boat

Consider the following statements : Hypermetropia is a defect of vision in which 1. a person cannot see the distant objects clearly 2. a person cannot see the near objects clearly 3. the near point of the eye gets shifted away from the normal position 4. the far point of the eye gets shifted towards the eye Which of the statements given above are correct?

1. A.1 and 3
2. B.2 and 4
3. C.1 and 4
4. D.2 and 3

A biogeographic region with significant reservoir of biodiversity that is under threat from humans is called as

1. A.bioendangered region
2. B.biodiversity hotspot
3. C.biodiversity reservoir
4. D.environmentally endangered region

Which one among the following is the largest monkey ?

1. A.Spider monkey
2. B.Baboon
3. C.Gorilla
4. D.Howler monkey

The major component used in preparation of different types of glasses is

1. A.Silica
2. B.Sodium borate
3. C.Calcium silicate
4. D.Sodium silicate

Refractive index of an optical medium changes with 1. the nature of the medium. 2. the change in the angle of incidence of the ray. 3. colour of the incident ray. Select the correct answer using the code given below:

1. A.1 and 3 only
2. B.2 and 3 only
3. C.1 and 2 only
4. D.1, 2 and 3

A one-rupee coin is placed at the bottom of a vessel. Water is then poured into the vessel such that the depth of water becomes 20 cm. If water has refractive index 4/3, the coin would be seen at a depth of

1. A.20 cm
2. B.about 26 cm
3. C.15 cm
4. D.25 cm

Which one among the following is not a mixture?

1. A.Graphite
2. B.Glass
3. C.Brass
4. D.Steel

A liquid rises to a certain length in a capillary tube. The tube is inclined to an angle of 45°. The length of the liquid column will :

1. A.increase.
2. B.decrease.
3. C.remain unchanged.
4. D.first decrease and then increase.

Which one among the following is the main ingredient in cement?

1. A.Gypsum
2. B.Lime stone
3. C.Clay
4. D.Ash

Solutions in test tubes containing ${\mathrm{H}}_2\mathrm{O}$ and aqueous NaOH can be differentiated with the help of :

1. A.red litmus.
2. B.blue litmus
3. C.$\mathrm{N}{\mathrm{a}}_2\mathrm{C}{\mathrm{O}}_3$
4. D.HCl (aqueous)

When concentrated ${\mathrm{H}}_2\mathrm{S}{\mathrm{O}}_4$ spilts on the surface, it should be immediately cleaned :

1. A.with a piece of cloth.
2. B.by adding cold water.
3. C.by adding solid $\mathrm{N}{\mathrm{a}}_2\mathrm{C}{\mathrm{O}}_3$.
4. D.by adding solid $\mathrm{BaC}{\mathrm{l}}_2$.

A student by chance mixed acetone with alcohol. This mixture of acetone and alcohol can be separated by :

1. A.filtration.
2. B.separating funnel.
3. C.fractional crystallization.
4. D.fractional distillation.

Which of the statements about glass are correct? 1. Glass is a super-cooled liquid having infinite viscosity 2. Violet coloured glass is obtained by adding $\mathrm{Mn}{\mathrm{O}}_2$ 3. Glass is a man made silicate 4. Glass is a crystalline substance Select the correct answer using the code given below:

1. A.1, 2 and 4
2. B.2, 3 and 4
3. C.1, 2 and 3
4. D.1 and 3 only

Sandalwood tree is considered a:

1. A.total root parasite.
2. B.total stem parasite.
3. C.stem parasite.
4. D.partial root parasite.

Consider the following statements about comets: 1. Most comets have elongated elliptical orbits that take them close to the Sun for a part of their orbit, and then out into the further reaches of the Solar System for the remainder 2. If a comet is traveling fast enough, it may leave the Solar System Which of the statements given above is/are correct?

1. A.1 only
2. B.2 only
3. C.Both 1 and 2
4. D.Neither 1 nor 2

Which of the following statements is/are correct? 1. In comparison to the Jupiter, planet Earth displays eclipses more frequently 2. On Mars only partial solar eclipses are possible Select the correct answer using the code given below:

1. A.1 only
2. B.2 only
3. C.Both 1 and 2
4. D.Neither 1 nor 2

To a perpendicular to the plane of ecliptic, the Earth’s axis of rotation makes an angle of 23½ degrees. Had this angle been 0 degree, which one among the following would result?

1. A.There would have been no seasons
2. B.The length of day and night would have been the same throughout the year
3. C.The length of day and night would have been the same all over the earth
4. D.All of the above

The next four (04) items are based on the following Table : Match List I with List II, List III and List IV and select the correct answer using the code given below : $$\begin{array}{llll}\text{List I (Body system)}& \text{List II (Organ)}& \text{List III (Structure)}& \text{List IV (Function of the system)}\\ \text{A. Blood Circulation}& \text{1. Bone marrow}& \text{I. Alveoli}& \text{i. Clot formation}\\ \text{B. Excretory}& \text{2. Thymus}& \text{II. T-lymphocyte}& \text{ii. Perfusion of tissues}\\ \text{C. Alimentary}& \text{3. Intestine}& \text{III. Myocardium}& \text{iii. Support and protect of body frame}\\ \text{D. Skeletal}& \text{4. Lung}& \text{IV. Matrix}& \text{iv. Oxygenation}\\ \text{E. Blood}& \text{5. Bone}& \text{V. Nephron}& \text{v. Filtration of body waste}\\ \text{F. Respiratory}& \text{6. Heart}& \text{VI. Villi}& \text{vi. Absorption of nutrients}\\ \text{G. Neurological}& \text{7. Kidney}& \text{VII. Axon}& \text{vii. Fighting infection and foreign invasion}\\ \text{H. Immunological}& \text{8. Neuron}& \text{VIII. Platelets}& \text{viii. Transmission of electrical impulse}\end{array}$$ List I List II List III List IV

1. A.C 3 VI vi
2. B.D 1 V iii
3. C.C 2 VII vi
4. D.D 5 IV vii