4

4

2πk/r. √(g/l)

r/2πk. √(l/g)

2πr/k. √(g/l)

r/2πk. √(g/l)

4

10°

20°

30°

40°

4

2π. √(g/δ)

1/2π. √(g/δ)

2π. √(δ/g)

1/2π. √(δ/g)

4

Self-closed

Force-closed

Friction closed

None of these

4

# The contact ratio is given by

(Length of the path of approach)/(Circular pitch)

(Length of path of recess)/(Circular pitch)

(Length of the arc of contact)/(Circular pitch)

(Length of the arc of approach)/cosφ

4

Less

More

Same

None of these

4

# The Grubler's criterion for determining the degrees of freedom (n) of a mechanism having plane motion is (where l = Number of links, and j = Number of binary joints)

n = (l -1) - j

n = 2(l - 1) - 2j

n = 3(l - 1) - 2j

n = 4(l - 1) - 3j

4

# If the damping factor for a vibrating system is unity, then the system will be

Over damped

Under damped

Critically damped

Without vibrations

4

# When a point moves along a straight line, its acceleration will have

Tangential component only

Coriolis component only

4

# Which of the following mechanism is an approximate straight line motion mechanism?

Watt's mechanism

Grasshopper mechanism

Robert's mechanism

All of these

4

Base circle

Pitch circle

Prime circle

Outer circle

4

# The size of a gear is usually specified by

Pressure angle

Circular pitch

Diametral pitch

Pitch circle diameter

4

# Critical damping is a function of

Mass and stiffness

Mass and damping coefficient

Mass and natural frequency

Damping coefficient and natural frequency

4

# Torsional vibrations are said to occur when the particles of a body moves

Perpendicular to its axis

Parallel to its axis

In a circle about its axis

None of these

4

# Oldhams coupling is an inversion of the kinematic chain used in

Whitworth quick return mechanism

Elliptical trammels

Rotary engine

Universal joint

4

m₁r₂ = m₂r₁

m₁r₁ = m₂r₂

m₁m₂ = r₁r₂

None of these

4

Above

Below

At

None of these

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

# The lower pair is a

Open pair

Closed pair

Sliding pair

Point contact pair

4

Sliding pairs

Turning pairs

Rolling pairs

Higher pairs

4

# The indicator using Watt mechanism is known as

Thompson indicator

Richard indicator

Simplex indicator

Thomson indicator

4

(1/2π). √(kG/g)

(1/2π). √(2kG/g)

2π. √(kG/g)

2π. √(2kG/g)

4

n/2

n

n - 1

n(n - 1)/2

4

# The Scott-Russell mechanism consists of

Sliding and turning pairs

Sliding and rotary pairs

Turning and rotary pairs

Sliding pairs only

4

# The sense of coriolis component 2 ωv is same as that of the relative velocity vector v rotated at

45° in the direction of rotation of the link containing the path

45° in the direction opposite to the rotation of the link containing the path

90° in the direction of rotation of the link containing the path

180° in the direction opposite to the rotation of the link containing the path

4

# When the addenda on pinion and wheel is such that the path of approach and path of recess are half of their maximum possible values, then the length of the path of contact is given by (where r = Pitch circle radius of pinion, R = Pitch circle radius of wheel, and φ = Pressure angle)

[(r² + R²) cosφ]/2

[(r² + R²) sinφ]/2

[(r + R) cosφ]/2

[(r + R) sinφ]/2

4

# When a mass of a critically damped single degree of freedom system is deflected from its equilibrium position and released, then it will

Oscillate with increasing time period

Oscillate with decreasing amplitude

Oscillate with constant amplitude

4

# A Hartnell governor is a

Pendulum type governor

Inertia governor

4

# The Klein's method of construction for reciprocating engine mechanism

Is a simplified version of instantaneous centre method

Utilises a quadrilateral similar to the diagram of mechanism for reciprocating engine

Enables determination of coriolis component

Is based on the acceleration diagram