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1. Which fuels are used for running automobiles?

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(1)

1. Which fuels are used for running automobiles?

a. Wood b. Coal c. Diesel d. Charcoal Ans. 1. (c)

2. Coal burns in air producing- a. CO2 and H2O

b. CO and H2 c. CO2CO2 d. O2 Ans.2. (c)

3. Combustion is a reaction in which a Substance reacts with- a. Hydrogen

b. Nitrogen c. Oxygen d. Chlorine Ans. 3. (c) 4. Fuel may be- a. Solid

b. Liquid c. Gas

d. All of these Ans. 4. (d)

5. Essential requirements for producing fire are:

a. Fuel b. Air c. Heat

d. All of these Ans.5. (d)

6 Which one of the following is fuel of our body?

a. Petrol b. Diesel c. Food d. Water Ans. 6. (c)

7. Combustion is a-

a. Physical process

b. Chemical process

c. Both (a) & (b)

d. None of these

Ans.7. (c)

(2)

8. On burning, fuel produces ________ amount of heat a. Large

b. Small c. Very small d. No heat Ans.8. (a)

9. When the Equivalence Ratio is lower than 1 a. in the products we find unburned fuel

b. in the products we find no residual O2 c. in the reactants there is excess fuel d. in the reactants there is excess air Ans.9. (a)

10. During the process of combustion ________

is

given out a. Heat

b. Light c. Sound

d. Both heat & light Ans. 10. (d)

11. Ideal fuel has ____ Heating Value a. Low

b. High c. Moderate d. Zero Ans. 11. (b)

12. Heating Value of a fuel is measured in a. Kilo joule

b. Kilograms c. Kilo joule per Kg d. Calories

Ans.12. (c)

13. Incomplete combustion gives a. all CO2

b. CO and H2 c. Carbon d. None of these Ans.13. (b)

14. Heating Value is the amount of heat produced on _____ combustion of 1kg of fuel is a. Incomplete

b. Complete c. Half

d. None of these

Ans. 14. (b)

(3)

15. The occurrence of a thermal explosion a. is more probable for a large vessel

b. is more probable for a small vessel

c. only depends on the activation energy of the reaction d. is independent of the initial temperature of the mixture Ans.25. (a)

16. Which of the following is/are carbon fuel a. Wood

b. Coal c. Petroleum d. All of these Ans. 16. (d)

17. Combustion of most fuels releases a. CO2

b. SO2 c. NO2 d. Oxygen Ans.17. (a)

18. Global warming is caused due to____ concentration of CO2 in air a. decreased

b. increased c. both (a) & (b) d. none of these Ans.18. (b)

19. The occurrence of dissociation in the product mixture of a combustion process a. increases the final temperature

b. increases the final pressure with no effect on the final temperature c. decreases the final temperature

d. has no influence on final pressure and temperature.

Ans.19. (c)

20. Constant volume combustion is best represented a. by a Continuous Stirred Tank Reactor model

b. by a Plug Flow Reactor model c. by a Batch reactor model d. by none of the above Ans.20. (c)

21. An ideal gas mixture

a. does not change its composition

b. has property values given by a weighted average of its components’ values for each given property

c. has constant enthalpy and enthropy d. has no excess reactants

Ans.21. (b)

(4)

22. Combustion of a gas mixture has highest adiabatic temperature a. when the equivalence ratio is lower than one

b. when the equivalence ratio is higher than one c. when done at constant pressure

d. when done at constant volume Ans.22. (d)

23. Constant pressure combustion is best represented a. by a Continuous Stirred Tank Reactor model

b. by a Plug Flow Reactor model c. by a Batch reactor model d. by none of the above Ans.23. (a)

24. The adiabatic flame temperature

a. independent of the path for given chemical reaction and reactant mixture composition b. is highest for constant volume combustion

c. is highest for constant pressure combustion

d. is highest is highest for an optimal transformation in between constant pressure and constant volume

Ans.24. (b)

14. Incomplete combustion gives a. CO2

b. CO

c. Carbon

d. None of these

Ans.14. (b)

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