Which are perfectly aligned
Which are not in exact alignment
Have lateral misalignment
Whose axes intersect at a small angle
A. Which are perfectly aligned
124 d
138 d
151 d
168 d
Angular bevel gears
Mitre gears
Internal bevel gears
Crown bevel gears
Bottom side of belt as slack side
Top side of belt as slack side
Idler pulley
None of the above
Tightening it properly
Increasing shank diameter
Grinding the shank
Making shank diameter equal to core diameter of thread.
T₁/T₂ = μθ
log (T₁/T₂) = μθ
T₁/T₂ =eμθ
T₁/T₂ = log μθ
Always in single shear
Always in double shear
Either in single shear or double shear
Any one of these
A taper key which fits half in the key way of hub and half in the key way of shaft
A taper key which fits in a key way of the hub and is flat on the shaft
A taper key which fits in a key way of the hub and the bottom of the key is shaped to fit the curved surface of the shaft
Provided in pairs at right angles and each key is to withstand torsion in one direction only
Bevel gearing
Helical gearing
Worm gearing
None of these
3.6 N/mm² compression
3.6 N/mm² tension
7.2 N/mm² compression
7.2 N/mm² tension
2000 N-m
2050 N-m
2100 N-m
2136 N-m
0.75 t for narrow strap on the inside and 0.625 t for wide strap on the outside
0.75 t for wide strap on the inside and 0.625 t for narrow strap on the outside
0.75 t for both the straps on the inside and outside
0.625 t for both the straps on the inside and outside
In decreasing the slip of the belt
In increasing the slip of the belt
To keep the belt in centre on a pulley while it is in motion
To increase pulley life
Gd⁴/ 8D3n
Gd3/ 8D3n
Gd⁴/ 4D3n
Gd⁴/ 8D²n
Gerber relation
Soderberg relation
Goodman relation
None of these
5 mm
10 mm
15 mm
25 mm
The V-belt may be operated in either direction with tight side of the belt at the top or bottom
The V-belt drive is used with large centre distance
The power transmitted by V-belts is less than flat belts for the same coefficient of friction, arc of contact and allowable tension in the belts
The ratio of driving tensions in V-belt drive is more than flat belt drives
4430 mm as diameter of small pulley
4430 mm as nominal pitch length
4430 mm as diameter of large pulley
4430 mm as centre distance between pulleys
Half
Same
Double
None of the above
Both ends hinged
Both ends fixed
One end fixed and the other end hinged
One end fixed and the other end free
Flat belt drive
V-belt drive
Crossed belt drive
Timing belt
Same
Double
One-half
One-fourth
Self locking bolt
Same as stud
Provided with hexagonal depression in head
Used in high speed components
1 kN-m
2 kN-m
3 kN-m
4 kN-m
The belt should touch the bottom of groove in the pulley
The belt should not touch the bottom of groove in the pulley
The belt should not touch the sides of groove in the pulley
None of the above
Equal to
Twice
Three times
Four times
Less than
Equal to
More than
None of these
Knuckle joint
Cotter joint
Oldham coupling
Universal joint
Constant period
Fixed period
Dwell period
Idle period
1
2
3
4
Surface of the top of the tooth
Surface of the tooth above the pitch surface
Width of the tooth measured along the pitch circle
Surface of the tooth below the pitch surface