For long columns, the value of buckling load is __________ crushing load.

What is the usual value of angle of nip for crushing of ordinary rock in smooth steel crushing rolls?

A

16°

B

32°

C

40°

D

46°

Choke crushing (in case of a Jaw crusher) compared to free crushing

A

Results in increased capacity

B

Consumes less power

C

Consumes more power

D

Both A and C

For crushing of solids, the Rittinger's law states that the work required for crushing is proportional to

A

The new surface created

B

The size reduction ratio

C

The change in volume due to crushing

D

None of these

The buckling load will be maximum for a column, if

A

One end of the column is clamped and the other end is free

B

Both ends of the column are clamped

C

Both ends of the column are hinged

D

One end of the column is hinged and the other end is free

The buckling load for a given material depends on

A

Slenderness ratio and area of cross-section

B

Poisson's ratio and modulus of elasticity

C

Slenderness ratio and modulus of elasticity

D

Slenderness ratio, area of cross-section and modulus of elasticity

The buckling load for a given column depends upon

A

Area of cross-section of the column

B

Length and least radius of gyration of the column

C

Modulus of elasticity for the material of the column

D

All of the above

Diameter of bubble caps used in high pressure columns is __________ as compared to that used in identical vacuum columns.

A

Less

B

More

C

Same

D

Either A or B; no generalisation can be made

In designing a connecting rod, it is considered like __________ for buckling about X-axis.

A

Both ends hinged

B

Both ends fixed

C

One end fixed and the other end hinged

D

One end fixed and the other end free

In designing a connecting rod, it is considered like __________ for buckling about Y-axis.

A

Both ends hinged

B

Both ends fixed

C

One end fixed and the other end hinged

D

One end fixed and the other end free

In order to have a connecting rod equally strong in buckling about X-axis and Y-axis, the moment of inertia about X-axis should be __________ the moment of inertia about Y-axis.

A

Equal to

B

Twice

C

Three times

D

Four times

For long columns, the value of buckling load is __________ crushing load.

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