KANNUR UNIVERSITY B.Tech B.Tech I&II 2K6EN 107 BASIC MECHANICAL ENGINEERING 2010 Question paper

Are you searching Kannur University Question Papers? Here You can find Basic Mechanical Question Paper

Name:

Combined First and Second Sem. B.Tech. Engineering

Regular/Supplementary Degree Examination, April 2010

2K6 EN rc7: BASIC MECHANICAL ENGG.

Time: 3 Hours Max. Marks:

Instructi.ons : i) Answer to all questions.

ii) Missing data if any may be suitably assumed.

1. a) Define and explain the terms thermodynamic. State, process and cycle.

b) State and explain Zeroth law of thermodynamics.

c) Sketch and explain briefly about working principle of 4-stroke petrol engine.

d) Sketch and explain briefly about working ofpelton turbine.

e) Differentiate between water tube and fire tube boilers.

0 Define the terms - relative humidity, humidity ratio, dry bulb temperature, wet

bulb temperature and dew point temperature.

g) Write a note on extrusion.

h) Srhat are different types of grinding machines ?.

2, a)The properties of certain fluid are related as follows :

 where

u- specific internal energy (kvlkg)

t - oC, p - pressure (KPa) and v : specific volume (*3lkg)

D for this fluid find Co and Cn.

ii) A system composed of two kg of the above fluid expands in a frictionless

friction and cylinder machine from an initial state of 1 MPa, 100oC to a final

temperature of 30"C. If there is no heat transfer, find the net work for

the process. 15

OR

(5x8=40)

P.T.O.

rltffiilffimilmilil

b) Derive the expression for work transferred in process

r) Reversible constant pressure

ii) Reversible isothermal process

iii) Reversible adiabatic process.

3. a) In an air standard diesel cycle, the compression ratio is 16, and at the beginning

of isentropic compression the temperature is 15oC and pressure is 0.1 MPa.

Heat is added until the temperature is 1480oC. Calculate

i) temperature and pressure at all the salient points

ii) The cut-off ratio

iii) Heat supplied per kg of air

iv) Heat rejected per kg of air

v) The Cycle efficiency.

OR

b) Sketch and explain the working principle of

D Reciprocating pump

ii) Centrifugal pump.

4. a) List various boiler mountings and accessories. Also mention their location

and functions.

OR

Sketch and explain the working principle of vapour compression refrigeration

system. Also give the comparison between vapour compression and vapour

absorption type of refrigeration systems.

With neat sketches explain the working principle of

i) Punching

ii) Wire drawing.

5. a)

OR

b) What are different milling operations ? Explain them with neat sketches.

Share This