Chemical Engineering - Chemical Engineering Basics
Exercise :: Chemical Engineering Basics - Section 26
| 31. |
Thermit welding is categorised as the __________ welding. |
Answer: Option B
Explanation:
|
| 32. |
A gas having a negative Joule-Thompson co-efficient, when throttled, will |
| A. |
become hotter. | | B. |
become cooler. | | C. |
remain unchanged. | | D. |
liquefy. |
Answer: Option A
Explanation:
|
| 33. |
Annealing of metal does not |
| A. |
precede its wire drawing. | | B. |
induce softness and removes stresses & dissolved gases. | | C. |
refine the crystalline structure & produce a definite microstructure. | | D. |
alter toughness, ductility and magnetic & electrical or other physical properties. |
Answer: Option A
Explanation:
|
| 34. |
Which of the following is a common constituent of both paint and oil varnish ? |
| A. |
Extender | | B. |
Pigment | | C. |
Thinner | | D. |
Drying oil |
Answer: Option D
Explanation:
|
| 35. |
Lithium is a useful alloying addition to aluminium, because it |
| A. |
is cheap. | | B. |
imparts solid solution strengthening. | | C. |
lowers density and contributes to age hardening. | | D. |
improves the corrosion resistance of aluminium. |
Answer: Option D
Explanation:
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