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Subjective Questions:-

Q. No. Questions Skill Marks
1. The outermost zone of a candle flame is the K 1

a. Least hot part. &A
b. Coldest part.
c. Hottest part.
d. Moderately hot part.

2. The flame of a kerosene lamp has U 1
a. Single zone.
b. Two zones.
c. Three zones.
d. Four zones.

3. Choose the correct option from the following: U 1
(a) If both Assertion and Reason are correct and Reason is the
correct explanation of Assertion.
(b) If both Assertion and Reason are correct, but Reason is not
the correct explanation of Assertion.
(c) If Assertion is correct but Reason is incorrect.
(d) If Assertion is incorrect but Reason is correct.
(e) If Assertion & Reason both are incorrect.
Assertion (A): Yellow flame is also known as the luminous
flame.
Reason (R): Since yellow flame produces more of light
4. a. Define flame. R + 1 + 2
b. What is the calorific value of a fuel? What is its unit? U = 3

5. Write down the characteristics of an ideal fuel.(Write at least 5 U 5
points)

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