For conveying steam
In water and sewage systems
In pressure lubrication systems on prime movers
All of the above
B. In water and sewage systems
12
14
18
24
Decrease the tendency of belt to slip
Increase the power transmission capacity
Increase the wrap angle and belt tension
All the above objectives
Shafts are arranged parallel and rotate in the opposite directions
Shafts are arranged parallel and rotate in the same directions
Shafts are arranged at right angles and rotate in one definite direction
Driven shaft is to be started or stopped whenever desired without interfering with the driving shaft
10°-20°
30°-40°
40°-60°
60°-80°
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 is middle of nut and then slot reduced by tightening a 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 spitted and bent in reverse direction at other end
0.5 times
Equal to
2 times
Double
Bending moment only
Twisting moment only
Combined bending moment and twisting moments
Combined action of bending moment, twisting moment and axial thrust
Best method
Extremely hazardous
Has no effect as regards fatigue strength
Cheapest method
1
1/π
π
π × number of teeth
Free from corrosion
Stronger in tension
Free from stress
Leak-proof
Measure forces
Apply forces
Store energy
All of these
Guest's theory
Rankine's theory
St Venant's theory
Von Mises theory
1420 d
1680 d
2080 d
2840 d
Rectangular
Elliptical
I-section
Any one of these
Less than 50 %
More than 50 %
Equal to 50 %
None of these
On both the sides
On one side only
On none of the sides
May be provided anywhere
Brinell
Rockwell
Vickers
None of the above
The pitch circle diameter is equal to the product of module and number of teeth
The addendum is less than dedendum
The pitch circle is always greater than the base circle
All of the above
Determining brittleness
Protecting metal against corrosion
Protecting metal against wear and tear
Experimental stress analysis
Muff coupling
Compression coupling
Flange coupling
All of these
Dynamic loading
Static loading
Combined static and dynamic loading
Completely reversed loading
X-axis as neutral axis
Y-axis as neutral axis
X-axis or Y-axis as neutral axis
Z-axis
Straining
Fatigue
Creep
Sudden loading
Directly as load
Inversely as square of load
Inversely as cube of load
Inversely as fourth power of load
Ductile materials
Brittle materials
Elastic materials
All of the above
5 N-m
7 N-m
10 N-m
15 N-m
Pitch diameter
Inside diameter
Outside diameter
Height
M6
M8
M6 - 8d
M8 - 6d
45°
60°
75°
90°
Power transmitted increases
Power transmitted decreases
Power transmitted increases to a maximum value and then decreases
Power transmitted remains the same