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Trade Practice Question Paper
Trade Practice
Course:
Institution: Nyeri Technical Training Institute question papers
Exam Year:2010
Nyeri Technical Training Institute
Automotive Engineering Department
Subject: Trade Practice
Time 6 HRS
Instructions
Answer all questions
Attempt all 4 questions
All necessary tools are provided
1. Dismantle the pre-engaged starter motor provided. Carry out all necessary tests and examinations on the parts and reports their conditions to the examiner. Assemble the unit
(1.5 hours)
Tools needed and equipment required.
pre-engaged starter motor;
battery
cleaning materials
hacksaw blade
circuit tester / a vomiter
growler
workshop tools
dial tester indicator gauge
vee blocks;
feeler gauge
2. Remove the turbo charger from the vehicle provided. Dismantle the unit and fit it, inspect the parts and replace the oil seals and bearings. Assemble the unit and fit it back to the engine. (1.5 hours)
Tools materials and equipment required.
vehicle /engine fitted with turbo charger.
workshop tools.
cleaning materials.
feeler gauge
pullers
dial gauge
a parts tray
new oils seals and bearings
3. Dismantle the engine block provided and determine the following:
(1.5 hours)
a) piston ring side clearance
b) piston ring working gap
c) ovality of the cylinders.
d) taper of the cylinder
e) crankshaft main bearing clearance.
f) crankshaft end float.
Tools, materials and equipment required:
- complete engine block.
- feeler gauge.
- bore gauge / internal micrometer
- dial gauge
- torque wrench
- plastic- gauge
- workshop tools
- workshop manuals.
4. Repair the following vehicle parts by oxy- acetylene welding process:
a) a cracked aluminum alloy rocker cover;
b) a cracked body steel sheet metal by fusion.
Tools, materials and equipment required:
- a cracked aluminum alloy component.
- a mild steel sheet metal
- aluminum alloy gas wielding rods;
- oxy- acetylene equipment;
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