Maharashi Dayanand University (MDU) 2010 B.Tech Electronics and Communications Engineering 2nd ssemester

B.tech second semester exam - may 2010

BASICS OF MECHANICAL ENGINEERING

NOTE: attempt five ques. in all , selecting 1 ques. from every part . ques. no.1 is compulsary . all ques. carry equal marks.

1. (a) discuss working principal of drilling machine.
(b) describe internal energy and enthalpy.
(c) describe refrigeration and air conditioning .
(d) Why francis turbine is called mixed flow turbine.
(e) discuss belt drive.
(f) What is poison's ratio?
(g) discuss four advantages of NC machine.
(h) What is zeroth legal regulations of thermodynamics
(i) Why we use psycheometric charts?
(j) What is the difference ranging from spur and helical gears? 2*10=20

part A

2. (a) discuss various kinds of chips in mettal cutting? 10
(b) describe 1, two and third legal regulations of thermodynamics. 10

3. (a) What is throttling calorimeter? 10
(b) discuss five operations of lathe machine. 10

part B

4. (a) discuss simle refrigeration vapour compression cycle. 15
(b) describe human comfort. 5

5. (a) Derive an expression for specific speed of turbine. 10
(b) discuss reciprocating water pumps. 10


part C

6. (a) discuss with neat diagram , multiple clutch. 15
(b) describe various kinds of gear. 5

7. discuss elastic constants and their relationship. 20


part C

8. discuss NC machine in detail. 20
9. describe manufacturing system and compare NC and CNC machines. 20

Earning:   Approval pending.