The process of improving the quality of rubber by heating it with sulphur is called

Addition of lead, sulphur and phosphorus to low carbon steel helps in improving its

A

Corrosion resistance

B

Tensile strength

C

Machinability

D

Compressive strength

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

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

Vulcanized rubber contains sulphur

A

2%

B

3-5%

C

7-9%

D

10-15%

Sulphur removal by heating of pyrite ore in presence of air is called its

A

Reduction

B

Roasting

C

Calcination

D

Smelting

Maximum sulphur percentage in low sulphur heavy stock (LSHS) furnace oil is about

A

0.1

B

1

C

2.5

D

3.5

The government has also decided to concentrate on improving the quality of healthcare.

A

focus

B

conceptualize

C

strike

D

deliberate

The Twenty Point programme (TPP) conceived with the objective of improving quality of life of people was first initiated in:

A

2006

B

1986

C

1982

D

1975

A company produces five types of shirts -- A,B,C,D and E-using cloth of three qualities -- high, medium and low , using dyes of three qualities-- high, medium and low. One shirt requires 1.5 m of cloth .The following table gives respectively : The number of shirts (of each category) produced, in thousands. The percentage distribution of cloth quality in each type of shirt, and The percentage distribution of dye quality in each type of shirt. How many meters of low-quality cloth is consumed?

A

40,00 m

B

60,000 m

C

46,500 m

D

22,500 m

The process of improving the quality of rubber by heating it with sulphur is called

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