ENERGY AND POWER QUIZ

0.5 times

2 times

Equal to

Double

Through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter spitted and bent in reverse direction at other end

A slot is cut partly in 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

One smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming

Thick cylinder

Dun cylinder

Solid shaft

Hollow shaft

Ductile materials

Brittle materials

Plastic materials

Nonferrous materials

Outside diameter

Height

Inside diameter

Pitch diameter

(6V/ π)1/3

(6V/ π)1/2

(6V/ π)2

(6V/ π)3

0.8 d

1.8 d

1.2 d

1.57 d

When the maximum principal stress in a biaxial stress system reaches the elastic limit of the material in a simple tension test

When the maximum shear stress in a biaxial stress system reaches the shear stress at elastic limit in a simple tension test

When the maximum principal strain in a biaxial stress system reaches the strain at the elastic limit as determined from a simple tension test

When the strain energy per unit volume in a biaxial stress system reaches the strain energy at the elastic limit per unit volume as determined from a simple tension test

σ [1 + (2a/b)]

σ [1 + (b/2a)]

σ [1 + (3a/b)]

σ [1 + (b/3a)]

Smaller

None of these

Medium

Greater