1. Which one of the following statements is true?

2. To double the period of oscillation of a simple pendulum

3. Sapwood consists of

4. The numbers of funicular polygons which can be drawn to pass through two specified points in the
space diagram are

5. A load of 500 kg was lifted through a distance of 13 cm. by an effort of 25 kg which moved through a distance of 650 cm. The mechanical advantage of the lifting machine is

6. Which of the following stresses is used for identifying the quality of structural steel?

7. In SI units, the units of force and energy are respectively

8. Strength of cement concrete primarily depends upon

9. A projectile has maximum range of 40 m on a horizontal plane. If Angle of projection is a and the
time of flight is 1 second, then sin a must be about (Assume g = 10 m/sec²)

10. A car goes round a curve of radius 100 m at 25 m/sec. The angle to the horizontal at which the
road must be banked to prevent sideways friction on the car wheels is tan"1 x, where x is (Assume g = 10 m/sec²)

11. Excess of alumina in brick earth makes the brick

12. The velocity of a moving body, is

13. A spring scale in a stationary lift shows a reading of 60 kg for a man standing on it. If the lift starts descending at an acceleration of g/5, the scale reading would be