Most of the candidates who attempted this question gave wrong answers. The correct answers for the various parts of the questions are:
(a) gear drive;
chain drive;
belt drive.
splines;
clutch and
universal joints.
(b) (i) Gears in gear box, rear axle, crankshaft
(ii) chain in crankshaft and camshaft
(iii) belt in water pump and alternator or crankshaft and camshaft.
(iv) splines in propeller shaft, half shaft and gear box main shaft.
(v) clutch in transmission system
(vi) universal joints as on propeller shaft.
(c) Any one of the following sketches is the required sketch for part [C(i) and C(ii)]
The correct defects and remedies for part [C(iii) and C(iv)] are
Defects |
Remedies |
* Warn broken gear teeth |
* Replace the gears |
* Stretched chain, broken teeth |
* Adjust chain, renew chain |
* Stretched belt, sheared teeth defective
sprocket |
* Adjust or renew belt, renew the
sprocket |
* Worn or sheared splines |
* Renew worn/sheared splined shaft |
* Worn or oily plate, broken
springs |
* Replace the plate. Replace the
broken springs. |
