Enhance the load carrying capacity of the jack
Reduce the effort needed for lifting the working load
Reduce the value of frictional torque required to be countered for lifting the load
Prevent the rotation of load being lifted
D. Prevent the rotation of load being lifted
T₁/T₂ = μ. θ. n
T₁/T₂ = [(1 - μ tanθ)/(1 + μ tanθ)]n
T₁/T₂ = (μ θ)n
T₁/T₂ = [(1 + μ tanθ)/(1 - μ tanθ)]n
Sliding pairs
Turning pairs
Rolling pairs
Higher pairs
Simple gear train
Reverted gear train
Sun and planet gear
Differential gear
Flat pivot bearing
Flat collar bearing
Conical pivot bearing
Truncated conical pivot bearing
Slow speed
Moderate speed
Highs peed
Any one of these
Is same as that of velocity
Is opposite to that of velocity
Could be either same or opposite to velocity
Is perpendicular to that of velocity
Depends upon
Is independent of
Either A or B
None of these
Number of cycles per hour
Number of cycles per minute
Number of cycles per second
None of these
Input link and coupler
Input link and fixed link
Output link and coupler
Output link and fixed link
Simple gear train
Compound gear train
Reverted gear train
Epicyclic gear train
ω (r₁ r₂) sinθ
ω (r₁ + r₂) sinθ sec2θ
ω (r₁ r₂) cosθ
ω (r₁ + r₂) cosθ cosec2θ
R (1 - cosθ)
(R - r₁) (1 - cosθ)
R (1 - sinθ)
(R - r₁) (1 - sinθ)
Above
Below
At
None of these
To move the ship towards starboard
To move the ship towards port side
To raise the bow and lower the stern
To raise the stern and lower the bow
Journal bearing
Ball and Socket joint
Leave screw and nut
None of the above
l = (1/2).(j + 2)
l = (2/3).(j + 2)
l = (3/4).(j + 3)
l = j + 4
Whitworth quick return mechanism
Elliptical trammels
Rotary engine
Universal joint
Less sensitive
More sensitive
Unaffected of sensitivity
Isochronous
Mass
Friction
Inertia
Resisting force
It is easy to disassemble
It is easy to engage and disengage
It transmits shocks gradually
It prevents shock transmission and eliminates stress reversals
Equal to
Less than
Greater than
None of these
(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)]
Below the critical speed
Near the critical speed
Above the critical speed
None of these
(1 - sinφ)/(1 + sinφ)
(1 + sinφ)/(1 - sinφ)
(1 - tanφ)/(1 + tanφ)
(1 + tanφ)/(1 - tanφ)
Lower pair
Higher pair
Spherical pair
Cylindrical pair
Motion of an I.C. engine valve
Motion of the shaft between a footstep bearing
Piston reciprocating inside an engine cylinder
All of the above
A small value of pressure angle
A large value of pressure angle
There is no such relation with pressure angle
Something else
Less
More
Same
None of these
ω₁.ω₂.r
(ω₁ - ω₂)r
(ω₁ + ω₂)r
(ω₁ - ω₂)2r
Less
More
Same
None of these