P = W tan(α - φ)
P = W tan(α + φ)
P = W tan(φ - α)
P = W cos(α + φ)
C. P = W tan(φ - α)
Open belt drive is recommended
Crossed belt drive is recommended
Both open belt drive and crossed belt drive is recommended
The drive is recommended depending upon the torque transmitted
Length of pair of contact to the circular pitch
Length of arc of contact to the circular pitch
Length of arc of approach to the circular pitch
Length of arc of recess to the circular pitch
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
Moved by the cam from beginning of ascent to the termination of descent
Equal to sum of other two
Greater than sum of other two
Less than sum of other two
There is no such relationship
Open pair
Closed pair
Sliding pair
Point contact pair
Incompletely constrained motion
Partially constrained motion
Completely constrained motion
Successfully constrained motion
ω (r₁ r₂) sinθ
ω (r₁ + r₂) sinθ sec2θ
ω (r₁ r₂) cosθ
ω (r₁ + r₂) cosθ cosec2θ
Reduce vibration
Reduce slip
Ensure uniform loading
Ensure proper alignment
sinα = b/c
cosα = c/b
tanα = c/2b
cotα = c/2b
l = (1/2).(j + 2)
l = (2/3).(j + 2)
l = (3/4).(j + 3)
l = j + 4
Minimise the effect of primary forces
Minimise the effect of secondary forces
Have perfect balancing
To start the locomotive quickly
Decreases linearly with time
Increases linearly with time
Decreases exponentially with time
Increases exponentially with time
m.ω².r cosθ
c.m.ω².r sinθ
(1 - c).m.ω².r (cosθ - sinθ)
m.ω².r (cosθ - sinθ)
Closed pair
Open pair
Mechanical pair
Rolling pair
In increasing velocity ratio
In decreasing the slip of the belt
For automatic adjustment of belt position so that belt runs centrally
Increase belt and pulley life
Constant
In arithmetic progression
In geometric progression
In logarithmic progression
One-third
Two-third
Double
Three times
Incompletely constrained motion
Partially constrained motion
Completely constrained motion
Successfully constrained motion
Double helical gears having opposite teeth
Double helical gears having identical teeth
Single helical gear in which one of the teeth of helix angle a is more
Mutter gears
1/24
1/8
4/15
12
n₁ + n₂
n₁ + n₂ + 1
n₁ + n₂ - 1
n₁ + n₂ - 2
Have line contact
Have surface contact
Permit relative motion
Are held together
The power absorbed in operating the piston valve is less than D-slide valve
The wear of the piston valve is less than the wear of the D-slide valve
The D-slide valve is also called outside admission valve.
All of the above
Belt, rope and chain drives
Gears, cams
Ball and roller bearings
All of the above
Slow speed
Moderate speed
Highs peed
Any one of these
Cylindrical pair
Turning pair
Rolling pair
Sliding pair
Velocity of various parts
Acceleration of various parts
Displacement of various parts
Angular acceleration of various parts
Grasshopper mechanism
Watt mechanism
Peaucellier's mechanism
Tchebicheff mechanism
15
28
30
8
Mass and stiffness
Mass and damping coefficient
Mass and natural frequency
Damping coefficient and natural frequency