Chemical Engineering - Chemical Engineering Basics
Exercise :: Chemical Engineering Basics - Section 9
| 11. |
For a first order chemical reaction, the concentration of the reactant decreases __________ with time. |
| A. |
linearly | | B. |
exponentially | | C. |
logarithmically | | D. |
inversely |
Answer: Option A
Explanation:
|
| 12. |
Air standard Otto cycle is more efficient than the diesel cycle for the same |
| A. |
heat addition & compression ratio. | | B. |
heat addition & pressure. | | C. |
compression ratio & pressure. | | D. |
cylinder dimension & rpm. |
Answer: Option A
Explanation:
|
| 13. |
In case of brasses, with decreasing zinc percentage and increasing copper percentage, its __________ increases. |
| A. |
percentage elongation | | B. |
brinell hardness | | C. |
tensile strength | | D. |
all 'a' , 'b' & 'c' |
Answer: Option A
Explanation:
|
| 14. |
A suitable lubricant used for watches is |
| A. |
metallic soap solution | | B. |
grease | | C. |
palm oil | | D. |
hazel-nut oil |
Answer: Option D
Explanation:
|
| 15. |
Out of the following __________ iron has the best capability to bear sudden & excessive shocks. |
Answer: Option C
Explanation:
|
