NDA General Ability Test Science and General Knowledge for practice

Free

NDA General Ability test Science paper 3

Time left =

Light of uniform intensity impinges perpendicularly on a totally reflecting surface. If the area of the surface is halved, the radiation force on it will become

1 double

2 half

3 four times

4 One fourth

.A metallic wire having a resistance of 20 Ω is cut into two equal parts in length. These parts are then connected in parallel. The resistance of this parallel combination is equal to

1 20 Ω

2 10 Ω

3 5 Ω

4 15 Ω

Two planets orbit the Sun in circular orbits, with their radius of orbit as
R1=R and R2 = 4R. Ratio of their periods (T1/T2) around the Sun will be

1 1/16

2 1/8

3 1/4

4 1/2

Cartilage is NOT found in

1 larynx

2 nose

3 ear

4 urinary bladder

Which one of the following plant tissues has dead cells?

1 Epidermis

2 Parenchyma

3 Collenchyma

4 Sclerenchyma

In prokaryotic organisms, nuclear region is not surrounded by a membrane. This undefined nuclear region is known as

1 Nucleic acid

2 Nucleoid

3 Nucleolus

4 Nucleosome

Which one of the following statements is NOT correct?

1 Biomass is a renewable source of energy

2 Gobar gas is produced When cow-dung, crop residues, vegetable waste, and sewage are allowed to decompose in the absence of Oxygen

3 Biogas generation reduces soil and water pollution

4 Heating capacity of biogas is very low

Which one of the following is NOT the unit of energy?

1 Joule

2 Watt-hr

3 Newton-metre

4 kg-metre/sec2

Two equal resistors R are connected in parallel, and a battery of 12 V is connected across this combination A dc current of 100 mA flows through the circuit as shown below

The value of R is

1 120 Ω

2 240 Ω

3 60 Ω

4 100 Ω

.In an incandescent electric bulb, the filament of the bulb is made up of which metal?

1 Aluminium

2 Copper

3 Tungsten

4 Silver

Which of the following statements is NOT correct regarding the travel of Sound waves?

1 Sound waves can travel through water

2 Sound waves can travel through the air

3 Sound waves can travel through steel

4 Sound waves can travel through a vacuum

A liquid is kept in a glass beaker. Which one of the following statements is correct regarding the pressure exerted by the liquid column at the base of the beaker?

1 The pressure depends on the area of the base of the beaker

2 The pressure depends on the height of the liquid column

3 The pressure does not depend on the density of the liquid

4 The pressure neither depends on the area of the base of the beaker nor the height of the liquid column

Vinegar is also known as

1 Ethanoic acid

2 Nitric acid

3 Sulphuric acid

4 Tartaric acid

The number of maximum electrons in N Shell is

1 2

2 8

3 18

4 32

Chalk and marble are different forms of

1 Calcium hydrogen carbonate

2 Calcium carbonate

3 Calcium acetate

4 Sodium carbonate