Interview question based on skill :
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Total Questions: 20
1. A fuel cell is used to convert chemical energy into
Correct Answer is : Electrical energy
2. Select the incorrect statement from the following option.
Correct Answer is : The noise levels of fuel cells are high
3. ______________ and suitable catalyst are required to promote high rate of electrode processes.
Correct Answer is : Higher temperature
4. A stable interface between solid _________ liquid ____________ and gaseous ___________ promotes high rate of electrode processes.
Correct Answer is : Electrode, electrolyte, fuel
5. Which of the following is not an example of a fuel cell?
Correct Answer is : Hexanone-oxygen cell
6. The process of gaining of electrons by metal ions with discharge of metal is called __________
Correct Answer is : De-electronation
7. The anode of the galvanic cell has __________
Correct Answer is : Negative polarity
8. The e.m.f of Daniel cell is __________
Correct Answer is : 1.09V
9. According to the convention, the Daniel cell is represented as ________
Correct Answer is : Zn l ZnSO4 ll CuSO4 l Cu, E = 1.09 volt
10. Which of the following is the correct reaction at anode?
Correct Answer is : Zn→Zn+2 + 2e–
11. Electronation is also called as ___________electrode.
Correct Answer is : Reduction
12. The movement of electrons in Daniel cell is from _________to _________
Correct Answer is : Zn to Cu
13. In Daniel cell, the two electrodes are separated by salt bridge.
Correct Answer is : TRUE
14. Decrease in free energy can be given by -ΔG= __________
Correct Answer is : nFE
15. Generally electrode potential refers to __________
Correct Answer is : Reduction potential
16. Electrolytes obey __________ to the some extent as metallic conductors.
Correct Answer is : Ohms law
17. The strength of the current is measured in terms of ___________
Correct Answer is : Amperes
18. The quantity of current passing through a conductor is expressed in terms of __________
Correct Answer is : Coulombs
19. Calculate the GCV and NCV of a fuel from the following data. Volume of the fuel burnt at STP is 0.08m2.Weight of the water used for cooling is 24kg.Temperature of inlet and outlet water is 25oC. and 30oC respectively. Weight of water obtained by steam condensation is 0.02kg.
Correct Answer is : 1353.25cal/g
20. Calculate the HCV and NCV of the coal for the following data. Weight of the coal=0.8g Water equivalent of calorimeter=460g Weight of the water=2600g Rise in temperature=2.42oC Cooling corrections=0.052oC Fuse wire corrections=10 calories H=6% and assume latent heat of steam=600cal/g.
Correct Answer is : 9131.4cal/g
