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Chemical Engineering - Chemical Engineering Basics

Exercise : Chemical Engineering Basics - Section 16
36.
Scaling occurs in boiler tubes due to the fact that, the solubility of Ca(OH)2 __________ with increasing temperature.
increases
decreases
shows inversion of solubility
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
37.
While the recrystallisation temperature for pure metals is 0.3 Tm, the same for alloys is equal to __________ x Tm (where, Tm Melting temperature).
0.25
0.45
0.70
0.95
Answer: Option
Explanation:
No answer description is available. Let's discuss.
38.
The factor of safety for brittle materials (having elongation < 5%) is based on the __________ stress.
yield
proof
ultimate
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
39.
Carburettor in a spark ignition engine is used to
mix air-fuel in the desired ratio.
maintain a constant speed at varying loads.
adjust the stroke length.
increase the compression ratio.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
40.
__________ are not emitted by radioactive substances.
α-rays
β-rays
protons
positrons
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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