PSC MODEL QUESTIONS-63

Q 1- Permanent hardness of water may be removed by the addition of:

1.Alum

2.Sodium Carbonate

3.Lime

4.Potassium Permanganate

 Answer:-2

Q 2 -The ratio of pure gold in 18 carat gold is:

1.60%

2.75%

3.80%

4.85%

 Answer:-2

Q 3 -Television was invented by:

1.Faraday

2. L. Baird

3.Edison

4.Marconi

Answer:-2

Q 4 – The electric filament of the bulbs is made up of:

1.Copper

2.Iron

3.Aluminium

4.Tungsten

 Answer:-4

Q 5- The most commonly used bleaching agent is:

1.Alcohol

2.Calcium Chloride

3.Chlorine

4.Sodium chloride

 Answer:-3

Q 6 -Newton is the unit of:

1.Work

2.Energy

3.Force

4.Acceleration

 Answer:-3

Q 7 -The ‘solder’ used in connecting electronic circuits consists of;

1.Lead and tin

2.Tin and iron

3.Copper and lead

4.Lead and aluminium

Answer:-1

Q 8 -The mammal capable of flying is:

1.Jaguar

2.Ostrich

3.Pelican

4.Bat

 Answer:-4

Q 9 -When milk is churned, the cream separates from it due to the:

1.cohesive force

2.frictional force

3.centrifugal force

4.gravitational force

 Answer:-3

Q 10 -A body in circular motion requires:

1.centrifugal force

2.centripetal force

3.inertial force

4.gravitational force

Answer:-2

Q 11 -The rising of ink to the point of nib in a fountain pen is due to:

1.surface tension

2.capillary action

3.gravitational attraction

4.None of the above

Answer:-2

Q 12 -As one goes up the mountain one suffers from nose bleeding sometimes. The reason is that

1.blood pressure decreases at high altitudes

2.blood pressure increases at high altitudes

3.as one starts going up, the pressure of the blood capillaries becomes higher than the outside pressure

4.None of the above

 Answer:-3

Q 13 -The inner lining of stomach is protected by one of the following from the harmful effect of hydrochloric acid. This is:

1.pepsin

2.mucus

3.saliva

4.bile

Answer:-2

Q 14-In coming years skin related disorders will become more common due to :

1.Excessive use of detergents

2.Water pollution

3.Air pollution

4.Depletion of ozone layer

 Answer:-4

Q 15 -The study of Earthquakes is known as:

1.Ecology

2.Titanology

3.Seismology

4.None of these

Answer:-3