3911: Which one of the following elements is alloyed with iron to produce steel which can resist high temperatures and also have high hardness and abrasion resistance ?
(a) Aluminium
(b) Chromium
(c) Nickel
(d) Tungsten
3912: Atmospheric pressure exerted on earth is due to the:
(a) Rotation of earth
(b) Revolution of earth
(c) Gravitational pull
(d) Uneven heating of earth
3913: Consider the following statements :
1. The duration of the monsoon decreases from southern India to northern India.
2. The amount of annual rainfall in the northern plains of India decreases from east to west.
Which of the statements given above is/are correct?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
3914: With reference to the history of philosophical thought in India, consider the following statements regarding Sankhya school :
1. Sankhya does not accept the theory of rebirth or transmigration of soul.
2. Sankhya holds that it is the self - knowledge the leads to liberation and not any exterior influence or agent.
Which of the statements given above is / are correct?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
3915: In 1930, a person's age was 8 times that of his son. In 1938, the father's age became ten times that of his son's age in 1930. The ages of the son and father in 1940 were, respectively.
(a) 16 years, 58 years
(b) 15 years, 50 years
(c) 14 years, 42 years
(d) 13 years, 34 years