Main constituents of natural rubber is

Thermal conductivity based continuous flue gas analyser makes use of varying thermal conductivity of the constituents of flue gases. Which of the following constituents of flue gases has the maximum thermal conductivity?

A

CO₂

B

N₂

C

O₂

D

CO

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

Main constituent of natural rubber is

A

Polystyrene

B

Polyisoprene

C

Polybutadiene

D

Poly chloroprene

In natural uranium, the constituents of three naturally occurring isotopes are

A

U₂₃₄ = 0.006%, U₂₃₅ = 0.712% and U₂₃₈ = 99.282%

B

U₂₃₄ = 0.712%, U₂₃₅ = 0.006% and U₂₃₈ = 99.282%

C

U₂₃₄ = 99.282%, U₂₃₅ = 0.006% and U₂₃₈ = 0.712%

D

U₂₃₄ = 0.006%, U₂₃₅ = 99.282% and U₂₃₈ = 0.712%

Main constituents of benzol are

A

benzene, toluene & xylene

B

tar & creosote

C

anthracene & phenol

D

ammonia & phenol

Main constituents of biogas are

A

Methane and carbon monoxide

B

Butane and carbon monoxide

C

Methane and carbon dioxide

D

Ethylene and carbon dioxide

The main mineral constituents of the continental mass water ________ and alumina.

A

Iron Oxide

B

Silica

C

Water

D

Oxygen

Main constituents of portland cement are calcium aluminate and

A

Gypsum

B

Silicates

C

Sodium silicate

D

Carbonates

Main constituents of natural rubber is

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