Engineering Chemistry II Practice Test 2

1. Which of the following is the expression for determination of calorific value of coal using Davies formulae? (where CV is calorific value, %H is percentage of hydrogen, %C is percentage of carbon, %O is percentage of oxygen and %S is percentage of sulphur.)

CV = (6.543×%H + 403)[%C/3 + %H + (%O - %S)/8]

CV = (6.543×%H - 403)[%C/3 + %H – (%O - %S)/8]

CV = (6.543×%H + 403)[%C/3 + %H – (%O - %S)/8]

CV = (6.543×%H - 403)[%C/3 + %H + (%O - %S)/8]

2. In ultimate analysis, how does the percentage of carbon and hydrogen are determined?

By using pure sulphur

By using pure oxygen

By using pure nitrogen

By using pure silicon

3. On what basis does the grading of coals is done in India for coals containing high moisture?

On the basis of its volatile matter

On the basis of its calorific value

On the basis of its ignition temperature

On the basis of its ash content and moisture

4. Which type of coals are non-caking in nature?

House coals

Gas coals

Pulverised coals

Steam coals

5. Which area of India consists of high anthracite content?

Neyveli

Darjeeling

Madhya Pradesh

Nilgiri

6. For what purpose does the dried peat is used?

Liquid purification

Thermal insulation

Destructive distillation

For production of calcium carbide

7. How does the texture of coal changes with its maturity?

Becomes hard, more brittle and more tough

Becomes hard, less brittle and moderately tough

No change

Becomes hard, more brittle and less tough

8. Which of the following content does upland type of peat consist?

Leaves

Sedges and grasses

Twigs

Decomposed heaths and mosses

9. Which type of coal is generated by the action of fungi and bacteria?

Bituminous

Peat

Lignite

Anthracite

10. Which of the following does require wood charcoal for its production?

Activated carbon

Alloys of tin

Plaster of Paris

Steel alloys