Trade Theory Question Paper

Trade Theory

Course:

Institution: Nyeri Technical Training Institute question papers

Exam Year:2012

Nyeri Technical Training Institute
Automotive Engineering Department
End Of Stage II-May-July 2012
Trade Theory
Class :MVM 11
Time: 21/2 HRS

INSTRUCTIONS: ANSWER ALL QUESTIONS
1. (a) List down 4 advantages of hydraulic braking system as compared to mechanical (2 marks)

(b) Explain the procedure of adjusting drum brake assembly of vehicles. (8 marks)

(c) With aid of a diagram, explain the operation of a single cylinder braking hydraulic system. (10 marks)

2.(a) List down two types of wet acid batteries. (2 marks)
(b) Illustrate the following on lead acid battery.
i . specific gravity of electrolyte

ii. Rate of discharge. (10 marks)
(c) With aid of a well labelled diagram explain the following operations of an A.C charging system.
1) Generation

2) Rectification. (8 marks)

3. (a) Differentiate between independent and rigid suspension of a vehicle. (4 marks)

(b) List down 3 constructional features of the following suspension system layouts.

1) Hydro gas
2)Hydra pneumatic. (4 marks)

(c) With a aid of a diagram explain the operation of the air suspension system.
(12 marks)

4. (a) State the four types of gearboxes usable in automotive. (2 marks)

(b) With the aid of a sketch illustrate the construction of a multi plate dry friction clutch unit. (8 marks)

(c) With the aid of a well labeled diagram explain the operation of a 4wheel.
Drive transfer gearbox with four wheel engagement on a higher range. (10 marks)

5. (a) State three types of construction (3 marks)

(b) With the aid of sketch illustrate the following tyre construction (7marks)

1) Radial ply

2) Radial belted

(c) Illustrate constructional difference of the following tyre.

1) Tubed

2) Tubeless. (10 marks)

End

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