Cochin University of Science and Techology (CUST) 2008-1st Year B.Tech mechanical engineering - Question Paper

BTECH DEGREE I&II SEMESTER exam
BASIC MECHANICAL ENGINEERING

Time:1 ½ Hrs Max marks:50


PART A

1. 1) one g of a fluid is compressed reversibly according to a legal regulations PV=0.2 ,where p is in
bar& V is in cubic meter / kg. The final quantity is ¼ of the initial quantity. compute
the work done on the fluid.

2) Briefly discuss vapour absorption refrigeration systems with neat sketch.

3) discuss the working of an impulse turbine with neat sketch.

4) discuss the working principle of a diesel fuel with neat sketch.
PART B

2. 1) Derive an expression for heat transferred in a polytropic process in terms of ratio
of specific heat & polytropic index.

2) discuss winter air conditioning system with a neat sketches.

OR

3. discuss the working principle of a four stroke petrol engine with neat sketches.

4. discuss various methods of lubrication of IC engines.
OR

5. elaborate various methods of arc welding? discuss welding defects.

---------------------------------

Earning:   Approval pending.