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Chemical Engineering - Chemical Engineering Basics

Exercise : Chemical Engineering Basics - Section 16
31.
Heat treatment of steel is done to mainly change its __________ properties.
physical
chemical
mechanical
surface
Answer: Option
Explanation:
No answer description is available. Let's discuss.
32.
Normal dosage of chlorine in public water supply scheme ranges from __________ ppm.
0.5 to 1
10 to 15
300 to 500
1000 to 1500
Answer: Option
Explanation:
No answer description is available. Let's discuss.
33.
Cast iron has the unique property of high
ductility
damping characteristics
hardness
malleability
Answer: Option
Explanation:
No answer description is available. Let's discuss.
34.
Thermal shock produced by cooling is more dengerous/deleterious than that produced by heating a surface, because of the reason that
cooling produces tension on the surface.
cooling produces compression on the surface.
heating does not produces any thermal stress.
heating produces compression on the surface.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
35.
The hardness of a grinding wheel is specified by the
alphabetical letter.
Rockwell hardness number.
Brinell hardness number.
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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