4

# Angle of descent of cam is defined as the angle

During which the follower returns to its initial position

Of rotation of the cam for a definite displacement of the follower

Through which the cam rotates during the period in which the follower remains in the highest position

Moved by the cam from the instant the follower begins to rise, till it reaches its highest position

A. During which the follower returns to its initial position

4

ω × AB

ω × (AB)²

ω² × AB

(ω × AB)²

4

Tractive force

Swaying couple

Hammer blow

None of these

4

No node

One node

Two nodes

Three nodes

4

# Which of the following statement is wrong?

A round bar in a round hole form a turning pair

A square bar in a square hole form a sliding pair

A vertical shaft in a foot step bearing forms a successful constraint

All of the above

4

# Bifilar suspension method is used to find the

Angular acceleration of the body

Moment of inertia of the body

Periodic time of the body

Frequency of vibration of the body

4

# In elliptical trammels

All four pairs are turning

Three pairs turning and one pair sliding

Two pairs turning and two pairs sliding

One pair turning and three pairs sliding

4

30° V-engine

60° V-engine

120° V-engine

150° V-engine

4

Triangle

Rectangle

Parallelogram

Pentagon

4

# Which of the following is an open pair?

Ball and socket joint

Journal bearing

Cam and follower

4

# A reed type tachometer use the principle of

Longitudinal vibration

Torsional vibration

Transverse vibration

Damped free vibration

4

# The pressure angle of a cam depends upon

Offset between centre lines of cam and follower

Lift of follower

Angle of ascent

All of the above

4

# The Coriolis component of acceleration acts

Along the sliding surface

Perpendicular to the sliding surface

At 45° to the sliding surface

Parallel to the sliding surface

4

Cylindrical pair

Turning pair

Rolling pair

Sliding pair

4

0.5

1

1.5

2

4

# In under damped vibrating system, the amplitude of vibration

Decreases linearly with time

Increases linearly with time

Decreases exponentially with time

Increases exponentially with time

4

4

# The Bifilar suspension method is used to determine

Natural frequency of vibration

Position of balancing weights

Moment of inertia

Centripetal acceleration

4

ωv

2ωv

ω²v

2ωv²

4

# A watt's governor can work satisfactorily at speeds from

60 to 80 r.p.m.

80 to 100 r.p.m.

100 to 200 r.p.m.

200 to 300 r.p.m.

4

# When a slider moves on a fixed link having curved surface, their instantaneous centre lies

On their point of contact

At the centre of curvature

At the centre of circle

At the pin joint

4

Upward

Downward

Forward

Backward

4

m/(m + M)

M/(m + M)

(m + M)/m

(m + M)/M

4

(1/2).Iω²

Iω²

(1/2). I ω ωP

I ω ωP

4

# Which of the following is a higher pair?

Turning pair

Screw pair

Belt and pulley

None of the above

4

# Angle of dwell of cam is defined as the angle

During which the follower returns to its initial position

Of rotation of the cam for definite displacement of the follower

Through which the cam rotates during the period in which the follower remains in the highest position

Moved by the cam from the instant the follower begins to rise, till it reaches its highest position

4

# The frictional torque transmitted in a truncated conical pivot bearing, considering uniform wear, is

(1/2). μ W cosec α (r₁ + r₂)

(2/3).μ W cosec α (r₁ + r₂)

(1/2). μ W cosec α [(r₁³ - r₂³)/(r₁² - r₂²)]

(2/3). μ W cosec α [(r₁³ - r₂³)/(r₁² - r₂²)]

4

# The absolute acceleration of any point P in a link about center of rotation O is

Along PO

Perpendicular to PO

At 45° to PO

None of the above

4

# In involute gears, the pressure angle is

Dependent on the size of teeth

Dependent on the size of gears

Always constant

Always variable

4

# A rigid body, under the action of external forces, can be replaced by two masses placed at a fixed distance apart. The two masses form an equivalent dynamical system, if

The sum of the two masses is equal to the total mass of body

The centre of gravity of the two masses coincides with that of the body

The sum of mass moment of inertia of the masses about their centre of gravity is equal to the mass moment of inertia of the body

All of the above