Have same value as that of standard specimen
Increase
Decrease
None of these
C. Decrease
Master leaf
Lower leaf
Upper leaf
None of these
One smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming
A slot is cut partly in middle of nut and then slot reduced by tightening screw
A hard fibre or nylon cotter is recessed in the nut and becomes threaded as the nut is screwed on the bolt causing a tight grip
Through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter pin splitted and bent in reverse direction at the other end
Combined effect of transverse shear stress and bending stress in the wire
Combined effect of bending stress and curvature of the wire
Combined effect of transverse shear stress and curvature of wire
Combined effect of torsional shear stress and transverse shear stress in the wire
Over head shaft
Counter shaft
Line shaft
All of these
Similar to small size tap bolts except that a greater variety of shapes of heads are available
Slotted for a screw driver and generally used with a nut
Used to prevent relative motion between parts
Similar to stud
Heavy load
Loose belt
Driving pulley too small
Any one of the above
0.5 to 1
1 to 2
3 to 5
5 to 10
340 to 360
420 to 450
More than 400
300 to 320
Tensile stress
Bending stress
Bearing stress
Shear stress
Straining
Fatigue
Creep
Sudden loading
Parallel
Perpendicular
Both A and B
None of these
20 to 30%
10 to 20%
30 to 40%
40 to 50%
Thick lubricated bearings
Plastic bearings
Antifriction bearings
Thin lubricated bearings
Directly proportional to the polar moment of inertia and to the distance of the point from the axis
Directly proportional to the applied torque and inversely proportional to the polar moment of inertia
Directly proportional to the applied torque and the polar moment of inertia
Inversely proportional to the applied torque and the polar moment of inertia
Axial load only
Both radial and axial loads and the ratio of these being greater than unity
Radial load only
Both radial and axial loads and the ratio of these being less than unity
Sleeve bearings
Hydrodynamic bearings
Thin lubricated bearings
None of the above
p.d.σc
p.t.σc
n.d.t.σc
(p - d) t.σc
Centroidal axis
Neutral axis
Inside fibre
Outside fibre
Elliptical cross-section
Major axis in plane of rotation
Major axis twice the minor axis
All the three characteristics
Bending stress only
A combination of torsional shear stress and bending
Direct shear stress only
A combination of bending stress and direct shear stress
The Oil film pressure is generated only by the rotation of the journal
The oil film is maintained by supplying oil under pressure
Do not require external supply of lubricant
Grease is used for lubrication
Effective tension is equal to centrifugal tension
Effective tension is half of centrifugal tension
Driving tension on slack side is equal to centrifugal tension
Driving tension on tight side is twice the centrifugal tension
10 m/s
12.5 m/s
15 m/s
20 m/s
Initial tension
External load applied
Sum of the initial tension and external load applied
Initial tension or external load, whichever is greater
A member made of steel will generally be more rigid than a member of equal load carrying ability made of cast iron
A member made of cast iron will generally be more rigid than a member of equal load carrying ability made of steel
Both will be equally rigid
Which one is rigid will depend on several other factors
Outer diameter
Hole diameter
Thickness
Mean diameter
Both ends hinged
Both ends fixed
One end fixed and the other end hinged
One end fixed and the other end free
12
14
18
24
Mild steel
Aluminium
Brass
Cast iron
Bevel gearing
Helical gearing
Worm gearing
None of these