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Strengths of a rivet in single shearing, in bearing and in tearing are 3425 kg, 4575 kg and 5025 kg respectively. If the load in the member is 35 tonnes, the number of rivets required, is

	10
	13
	11
	12

A simply supported beam carrying a uniformly distributed load over its whole span, is propped at the centre of the span so that the beam is held to the level of the end supports. The reaction of the prop will be

	5/8th the distributed load
	3/8th the distributed load
	distributed load.
	half the distributed load

5/8th the distributed load

The hardness of steel increases if it contains

	pearlite
	martensite
	cementite
	ferrite

cementite

After a capacitor has charged for 1 tc, what percentage of current remains in the resistor?

	36.8
	5.0
	13.5
	63.2

36.8

Reactance in an inductive circuit will:

	be independent from frequency
	decrease with frequency
	increase with frequency
	depend on the value of XC

increase with frequency

If an apple is released from an orbiting spaceship, it will

	move with lower speed
	fall towards the earth
	move at the higher speed
	move along the spaceship at the same speed

move along the spaceship at the same speed

A Hall effect sensor

	exists only in theory
	produces very large voltages
	can operate only a few times before failure
	is a noncontacting magnetic sensor

is a noncontacting magnetic sensor

The basic difference between a fuse and a circuit breaker is

	a fuse is reusable
	a fuse is slower
	a circuit breaker is reusable
	a circuit breaker is more reliable

a circuit breaker is reusable

A liquid is kept in a glass beaker. Which molecules of the liquid have the highest potential energy?

	Molecules at the bottom of the beaker
	Molecules lying in the surface film
	Molecules near the centre of the liquid
	Molecules lying at half the depth of the liquid and touching the walls of the beaker

Molecules lying in the surface film

Which of the following statement is incorrect?

	The ratio of the limiting friction to the normal reaction is called coefficient of friction.
	The velocity ratio of a machine is the ratio of load lifted to the effort applied.
	A machine whose efficiency is 100% is known as an ideal machine.
	A force acting in the opposite direction to the motion of the body is called force of friction.

The velocity ratio of a machine is the ratio of load lifted to the effort applied.

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