Goa Board Class 12 Question Paper 2025 Automobile Engineering II

2025 II 21 0930 Seat No.

Time : 2 Hours AUTOMOBILE ENGINEERING-II

Subject Code

V 4 3 2 2

Total No. of Questions : 23 (Printed Pages : 4) Maximum Marks : 50

INSTRUCTIONS : (i) There are four sections in the question paper (A, B, C, D)
consisting of 23 questions.

(ii) In Section ‘A’ there are eight questions of which question
Nos. 1 to 4 are multiple choice questions, Q. Nos. 5 and 6 are
to be answered in one word, phrase, number and Q. Nos. 7
and 8 are to be answered in one sentence each.

(iii) Attempt all questions, however, internal choice is given for
question number 20 and 23.

(iv) Figures to the right indicate marks allotted to each question.

(v) Write the number of each question clearly on the answer-
book.

Section A

1. One of the circuit of carburettor that helps in maintaining level of fuel
is ....................... 1

• Choke Circuit

• Float Circuit

• Idling Circuit

• High Speed Circuit
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2. To operate mechanical fuel pump the camshaft is provided with ............ 1

• Belt

• Gear

• Eccentric

• Push Rod

3. In air cooled engines, fins are provided for block and head to ............... 1

• Cool the engine faster

• Block the air flow

• Allow air to swing

• Increase the surface area of metal in contact with air

4. In pump circulation water cooling system the boiling point of coolant is

raised by ............................. 1

• Vacuum valve

• Radiator

• Water jackets

• Pressure cap

5. Name the sensor that monitors mass or volume of air flowing into the intake

manifold for adjusting the quantity of fuel. 1

6. What is the thickness of LPG fuel tank made from alloy steel ? 1

7. Why is pressure relief value provided in pressurized lubrication system ? 1

8. Why sight glass is provided in some air conditioning system ? 1

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Section B

9. Write a short note on the working of fuel feed/transfer pump used in diesel
fuel supply system. 2

10. Explain in detail the Common Rail System in diesel engine. 2

11. State any four functions of fuel injection pump used in diesel engine. 2

12. Explain the port injection method used in petrol injection system. 2

13. Explain the working of air conditioning system of automobile vehicle. 2

14. Draw a neat labelled diagram of individual pump fuel injection system used
in diesel engine. 2

Section C

15. Write a short note on the constructional details of Compressed Natural Gas
fuel supply system. 3

16. State any six objects of lubrication. 3

17. Explain in detail the heating system of air conditioning of an automobile. 3

18. Describe the positive crankcase ventilation used in automobile to control
emission. 3

19. Explain the construction and working of charcoal canister used in controlling
vapour emission. 3

20. Draw a neat labelled sketch of D-MPFI system and state any two advantages
of Petrol injection system. 3

Or

Draw a neat labelled diagram of throttle body injection system and state any
two disadvantages of MPFI system.

[V-4322] 3 P.T.O.

Section D

21. Draw a neat labelled sketch of simple carburettor and state its four
functions. 4

22. Draw a neat labelled diagram of pump circulation water cooling system and
explain its working. 4

23. Draw a neat labelled sketch of Dry Sump Lubrication System and explain
its constitutional details. 4

Or

Explain the constructional details of rotor type oil pump with a neat labelled
sketch.

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