1151. Steel is more elastic than rubber because ________.

A. Its density is high
B. It is a metal
C. Ratio of stress to strain is more *
D. Ratio of stress to strain is less

1152. What does make the blood look red?

A. Red corpuscles
B. Haemoglobin *
C. Plasma
D. Certain secretions

1153. In railway tracks, a small gap is left between the rails _______.

A. To allow for the expansion during heat *
B. To save the cost of metal
C. To permit the shrinkage of metal
D. None of the above

1154. Friction can be reduced by changing over from ___________.

A. Sliding to rolling *
B. Rolling to sliding
C. Potential energy to kinetic energy
D. Dynamic to static

1155. Ice blocks are covered with sawdust_________.

A. To prevent the dust from collecting on the ice
B. Because ice being cold cannot be lifted with bare hands
C. To provide necessary insulation from heat *
D. None of the above

1156. The acid used in a car battery is __________.

A. Hydrochloric acid
B. Nitric acid
C. Sulphuric acid *
D. Carbonic acid

1157. While dusting a carpet we give a sudden jerk or beat it with a stick, because _____________.

A. Inertia of rest keeps the dust in its position and the dirt is removed by the movement of carpet away.
B. Inertia of motion removes the dust *
C. The Jerk compensates for the force of adhesion between the dust and the carpet and the dust is removed
D. None of the above

1158. After drinking contaminated water yo would be most apt to develop symptoms of __________.

A. Malaria
B. Typhoid fever *
C. Yellow fever
D. Schistosomiasis

1159. In eye donation , which one of the following parts of donor’s eye is utilized ?

A. Iris
B. Lens
C. Cornea *
D. Retina

1160. Storage batteries commonly contain ____________.

A. Copper
B. Mercury
C. Lead *
D. Iron

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