The normal value of adhesion friction is

The value of coefficient of adhesion will be high when rails are

A

Greased

B

Wet

C

Sprayed with oil

D

Cleaned with sand

If cohesion between molecules of a fluid is greater than adhesion between fluid and glass, then the free level of fluid in a dipped glass tube will be

A

Higher than the surface of liquid

B

The same as the surface of liquid

C

Lower than the surface of liquid

D

Unpredictable

Coefficient of adhesion reduces due to the presence of which of the following?

A

Sand on rails

B

Dew on rails

C

Oil on the rails

D

Both (B) and (C)

Coefficient of adhesion is

A

High in case of D.C. traction than in the case of AC. traction

B

Low in case of D.C. traction than in the case of AC. traction

C

Equal in both Aand D.traction

D

Any of the above

Due to which of the following coefficient of adhesion improves?

A

Rust on the rails

B

Dust on the rails

C

Sand on the rails

D

All of the above

When a bogie negotiates a curve, reduction in adhesion occurs resulting in sliding. Thus sliding is acute when

A

Wheel base of axles is more

B

Degree of curvature is more

C

Both (A) and (B)

D

None of the above

A liquid would wet the solid, if adhesion forces as compared to cohesion forces are

A

Less

B

More

C

Equal

D

Less at low temperature and more at high temperature

Which facility is given to the policyholder to neutralise the bargaining power in adhesion contracts?

A

Surrender

B

Loan

C

Assignment

D

Free look period

Why insurance contract is an Adhesion Contract?

A

Insurance Co. has all the bargaining power

B

Client has also great bargaining power

C

Both A & B

D

None of the three

The dynamic friction is the friction experienced by a body, when the body

A

is in motion

B

is at rest

C

just begins to slide over the surface of the other body

D

none of the mentioned

The normal value of adhesion friction is

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