P = 2L - 4
P = 2L + 4
P = 2L + 2
P = 2L - 2
C. P = 2L + 2
Eight links
Six links
Four links
Twelve links
a is +ve and b = 0
a = 0 and b is +ve
a is +ve and b is -ve
a is +ve and b is also +ve
T = W.r tan(φ - α)
T = W.r tan(φ + α)
T = W.r tanα
T = W.r tanφ
Along the sliding surface
Perpendicular to the sliding surface
At 45° to the sliding surface
Parallel to the sliding surface
9/8
9/82
9/16
9/128
Shoe brake
Band brake
Band and block brake
Internal expanding brake
Varies in magnitude but constant in direction
Varies in direction but constant in magnitude
Varies in magnitude and direction both
Constant in magnitude and direction both
It is easy to disassemble
It is easy to engage and disengage
It transmits shocks gradually
It prevents shock transmission and eliminates stress reversals
Grasshopper mechanism
Watt mechanism
Peaucellier's mechanism
Tchebicheff mechanism
Cause withdrawing or throttling of steam
Reduce length of effective stroke of piston
Reduce maximum opening of port to steam
All of these
Compound gears
Worm and wheel method
Hooke's joint
Crown gear
Increases as the radius of rotation decreases
Increases as the radius of rotation increases
Decreases as the radius of rotation increases
Remain constant for all radii of rotation
Mass and stiffness
Mass and damping coefficient
Mass and natural frequency
Damping coefficient and natural frequency
(r₁ + r₂) (y/x)
(r₁ + r₂) (x/y)
(r₁ - r₂) (y/x)
(r₁ - r₂) (x/y)
Perpendicular to its axis
Parallel to its axis
In a circle about its axis
None of these
Unbalanced couples are caused only at higher speeds
Unbalanced forces are not dangerous at higher speeds
Effects of unbalances are proportional to the square of the speed
Effects of unbalances are directly proportional to the speed
Spur gear
Bevel gear
Spiral gear
None of the above
Can be used
Cannot be used
Unpredictable
None of these
Positive throughout
Negative throughout
Positive during major portion of the stroke
Negative during major portion of the stroke
Cross head
Slider crank
Connecting rod
Gudgeon pin
One-half
Two-third
n times
1/n times
Over damped
Under damped
Critically damped
Without vibrations
Small
Too small
Large
Too large
Belt and pulley
Turning pair
Screw pair
Sliding pair
Balanced completely
Balanced partially
Balanced by secondary forces
Not balanced
Lower pairs
Higher pairs
Rolling pairs
Turning pairs
Less sensitive
More sensitive
Unaffected of sensitivity
Isochronous
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
Pitch circle
Base circle
Pitch curve
Prime circle
Hartung governor
Wilson Hartnell governor
Pickering governor
Inertia governor