106: Which of the following is used in diesel engine?
(1) Cylinder
(2) Spark Plug
(3) Piston
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(a) 1, 2 and 3
(b) 1 and 2
(c) 2 and 3
(d) 1 and 3
107: The average salary of skilled employees in a firm is Rs. 520 and that of the unskilled employees is Rs. 420. If the average salary of both the groups of employees is Rs. 500, then the percentage of skilled employees in the firm is
(a) 50
(b) 20
(c) 80
(d) 70
108: The evidence for the rotation of stars comes mainly from the
(a) Doppler effect
(b) Photoelectric effect
(c) Stark effect
(d) Zeeman effect
109: Consider the following statements regarding the Directive Principles of State Policy:
1. The Principles spell out the socio-economic democracy in the country.
2. The provisions contained in these Principles are not enforceable by any court.
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
110: Which of the following statements about 'Dinosaurs' is/are correct?
(a) The early man was a contemporary of Dinosaurs
(b) Man appeared first after the Dinosaurs became extinct
(c) The Dinosaurs became extinct about six million years before the appearance of the first man on the earth
(d) The Dinosaurs became extinct about 200 million years before the first man appeared on the earth