Chemical Engineering - Chemical Engineering Basics

6. 

Filler metal is used in __________ welding.

A. braze
B. electric spot
C. projection
D. seam

Answer: Option A

Explanation:

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7. 

Acetylene should never be conveyed through __________ pipe, as it forms an unstable compound that dissociates violently at the slightest shock.

A. stainless steel
B. copper
C. aluminium
D. brass

Answer: Option B

Explanation:

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8. 

Which of the following contains the least percentage of carbon ?

A. Pig iron
B. Wrought iron
C. Cast iron
D. Malleable iron

Answer: Option B

Explanation:

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9. 

Electric arc furnace is employed mainly for the production of __________ steel.

A. high carbon
B. alloy
C. mild
D. plain carbon

Answer: Option B

Explanation:

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10. 

Heat treatment of steel is done mainly to change its

A. mechanical properties.
B. physical properties,
C. chemical composition.
D. all 'a', 'b' & 'c'.

Answer: Option A

Explanation:

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