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

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

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

A

Greased

B

Wet

C

Sprayed with oil

D

Cleaned with sand

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

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

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

The normal value of adhesion friction is

A

0.12

B

0.25

C

0.40

D

0.75

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

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

Presence of sulphur in steel reduces the

A

Hardness

B

Grain size

C

Tensile strength

D

Toughness & transverse ductility

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

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