Which of the following relatively employs the highest heat transfer surface area in a high pressure boiler ?

Question: A machine having assumed life of 20 years is purchased for Rs 32000/-. Its scrap value at the end of its life is Rs 8000/-. If the depreciation is calculated by diminishing balance method, then percentage reduction in its value at the end of first year is __________ percent.
[A].

6.7

[B].

7.6

[C].

10.3

[D].

15.2

Answer: Option A

Explanation:

No answer description available for this question.

Question: Metalloids
[A].

are good conductor of heat & electricity.

[B].

act as electron donors with metals & as electron acceptor with non-metals.

[C].

are not necessarily solids at room temperature.

[D].

are compounds that exhibit both metallic & non-metallic properties to some extent and are exemplified by elements like germanium, silicon & boron.

Answer: Option D

Explanation:

No answer description available for this question.