APPLIED MECHANICS AND GRAPHIC STATICS QUIZ

The velocity ratio of an inclined plane of inclination ‘θ’ with horizontal for lifting a load is

sin θ

cos θ

cosec θ

tan θ

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Three forces which act on a rigid body to keep it in equilibrium. The forces must be coplanar and

Concurrent parallel

None of these

Parallel

Concurrent

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The force polygon representing a set of forces in equilibrium is a

Triangle

Parallelogram

Closed polygon

Open polygon

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The necessary condition of equilibrium of a body is:

Algebraic sum of vertical components of all the forces must be zero

Algebraic sum of the moments of the forces about a point must be zero

All (A), (B) and (C)

Algebraic sum of horizontal components of all the forces must be zero

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Power developed by a torque, is

2πNT kg m/min

2πNT/4500 h.p

All listed here

2πNT /60 watts

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The piston of a steam engine moves with a simple harmonic motion. The crank rotates 120 r.p.m. and the stroke length is 2 meters. The linear velocity of the piston when it is at a distance of 0.5 metre from the centre, is

10.88 m/sec

8.88 m/sec

5.88 m/sec

12.88 m/sec

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The maximum value of the horizontal range for a projectile projected with a velocity of 98 m/sec is

98 m

980 m

1960 m

490 m

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The product of mass and velocity of a moving a body, is called

Power

Momentum

Moment

Impulse

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A quantity measured in the C.G.S system of units has dimensions M”2L3 T3/2. What numerical factor would be required to convert the quantity to SI units ?

1/100

1

1/10000

100

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When two forces, each equal to P, act at 90° to each other, then the resultant will be

2P

P√2

P/√2

P

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