Which of the following is generally not used as eord for synthetic rubber tyre casing?

World's largest synthetic rubber and tyre making centre is ________

A

Cleveland

B

Sharon

C

Akron

D

Wheeling

In comparison with a radial tyre, one advantage of a bias ply tyre is

A

Longer life

B

Lower rolling resistance

C

Smoother ride at low speeds

D

None of these

The advantage of a tubeless tyre over tube type tyre is

A

Slow air leakage

B

Better fuel efficiency

C

Less chances of running flat

D

All of these

Which of the following is used as filler in tyre of rubber ?

A

Carbon black

B

Coal

C

Coke

D

Graphite

Which of the following is a Synthetic rubber?

A

Leoprene

B

Monoprene

C

Neoprene

D

Isoprene

Synthetic rubber

A

Deforms, if stretched to double of its original dimension

B

Is brittle at low temperature

C

Is softer at higher temperature

D

Is highly permeable to air & water and is readily attacked by chemicals & atmospheric gases

Natural rubber is obtained from latex, which is a colloidal dispersion of rubber in water. Which of the following is used as a coagulant in latex?

A

Ammonium alum

B

Potassium alum

C

Both A & B

D

Neither A nor B

Styrene-butadiene-rubber (SBR) as compared to natural rubber has

A

Poorer tensile strength

B

Poorer resistance to oxidation

C

Greater amount of heat build-up under heavy loading

D

All of the above

Styrene butadiene rubber (SBR) as compared to natural rubber has

A

Poor tensile strength

B

Poorer resistance

C

Greater amount of heat build up heavy loading

D

All of the above

The tyre rotation is generally done at

A

1,000 km

B

4,000 km

C

6,000 km

D

10,000 km

Which of the following is generally not used as eord for synthetic rubber tyre casing?

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