B12502 Automobile Electrical Equipments DAE Question Paper Model : psgpolytech.ac.in

College : PSG Polytechnic College
Degree :DAE (Diploma in Automobile Engineering)
Semester : V
Subject : B12502 Automobile Electrical Equipments
Document Type : Model Question Paper
Website : psgpolytech.ac.in

Download Model/ Sample Question Papers : https://www.pdfquestion.in/uploads/psgpolytech.ac.in/6239-B12502.pdf

PSG Electrical Equipment Question Paper

Instructions :
1. Group A and Group B questions should be answered in the Main Answer book.
2. Answer any TEN questions in Group A. Each question carries three marks.

Related : PSG Polytechnic College B12501 Automobile Chassis & Transmission DAE Question Paper Model : www.pdfquestion.in/6237.html

3. Answer ALL questions either (a) subdivision or (b) subdivision in Group B. Each question carries 14 marks.

November 2014

PSG POLYTECHNIC COLLEGE, COIMBATORE – 641 004
DIPLOMA ODD SEMESTER EXAMINATIONS – NOV 2014
B12502 Automobile Electrical Equipments
MODEL QUESTION PAPER
Time : 3 Hours Max.Marks: 100
Group – A Marks : 10 x3=30
1. What are the purposes of battery in an automobile-
2. List out the methods used to charge the battery.
3. Write the cause and remedies of sulphation in battery.
4. What is the principle of generator-

5. Enumerate the advantages of Alternator over D.C.Generator.
6. What is meant by compensated voltage regulator-
7. Explain the need of drive mechanism in a staring motor.

8. Why starter motor need solenoid switch-
9. List the types of driving mechanism used in a starter motor.
10. Explain the function of ignition coil with sketch.

11. Describe contact breaker point mechanism.
12. List the types of spark plug and state its function.
13. Discuss the purpose of lighting system in an automobile.

14. Write short notes on horn tuning.
15. What is meant by (i) Dip switch (ii) single pole (iii) Circuit Breakers

Group– B Marks : 5 x 14 = 70
16. (a) Explain Lead acid battery construction and the component details with sketch.
(OR)
(b) What are the methods used to test a battery? Explain them with simple sketch.

17. (a) Enumerate the construction and working principle of an alternator with sketch.
(OR)
(b) Draw a neat circuit diagram and explain the working principle of Compensated voltage regulator.

18. (a) Describe the construction and working principle of Starting motor with a neat sketch.
(OR)
(b) Explain the construction and working of Bendix drive mechanism with a neat sketch.

19. (a) Describe the working principal of battery coil ignition system with a neat circuit.
(OR)
(b) With a neat circuit diagram and explain the electronic ignition system.

20. (a) Briefly explain the electric horn circuit with horn relay.
(OR)
(b) Explain the following with neat circuit.
(i) Fuel gauge (7)
(ii) Oil pressure gauge. (7)

Fluid Mechanics & Machinery Question

Time : 3 Hours
Max.Marks : 100
Group – A Marks : 10 x 3 = 30
1. Define specific gravity and weight density of a fluid.
2. State Pascal’s law with its application.
3. What is a manometer- How are they classified-

4. State the difference between laminar and turbulent flow of fluid.
5. State Bernoulli’s theorem with its application.
6. Define the terms : i) Hydraulic gradient line and ii) Total energy line.

7. What is priming- Why is it necessary-
8. State the difference between centrifugal and reciprocating pumps.
9. Define cavitation. What are its effects-

10. How does a torque converter differ from fluid coupling-
11. What is a hydraulic system- What are the elements of hydraulic system-
12. Define the term hydraulic accumulator.

13. State the difference between hydraulic and pneumatic systems.
14. Draw the symbols of 3/2 DCV and 4/2 DCV.
15. List the merits and demerits of hydraulic system.

Group– B Marks : 5 x 14 = 70
16. a). i). One litre of crude oil weighs 9.6N. Calculate its specific weight, density and specific gravity. (5)
ii). Explain briefly the working principle of Bourdon tube pressure gauge with a neat sketch. (9
(OR)

b). A U-tube differential manometer connects two pressure pipes A and B. Pipe A contains carbon tetra chloride having relative density of 1.594 under a pressure of 11.772 N/cm2 and pipe B contains oil of relative density 0.8 under a pressure of 11.772 N/cm2.

The pipe A lies 2.5m above pipe B. Find the difference of pressure measured by mercury as fluid filling U-tube.

17. a). i) What are the assumptions made in deriving Bernoulli’s theorem? (5)

ii) A venturi meter having a throat of 100mm diameter is fitted to a pipe of 250mm diameter. An oil of relative density 0.8 is flowing through the pipe. The mercury manometer reads 250mm. find the velocity and discharge of oil in the pipe if the coefficient of meter is 0.97. (9)