B.Tech-ELECTRONICS AND COMMUNICATIONS 2nd Sem BASICS OF MECHANICAL ENGINEERING(Maharashi Dayanand University (MDU), Rohtak-2010)
Wednesday, 13 October 2010 11:33Administrator
1. (a) Explain working principal of drilling machine.
(b) Define internal energy and enthalpy.
(c) Define refrigeration and air conditioning .
(d) Why francis turbine is called mixed flow turbine.
(e) Explain belt drive.
(f) What is poison's ratio?
(g) Explain 4 advantages of NC machine.
(h) What is zeroth law of thermodynamics
(i) Why we use psycheometric charts?
(j) What is the difference between spur and helical gears? 2*10=20
SECTION A
2. (a) Explain different types of chips in mettal cutting? 10
(b) Define 1, 2 and 3rd law of thermodynamics. 10
3. (a) What is throttling calorimeter? 10
(b) Explain 5 operations of lathe machine. 10
SECTION B
4. (a) Explain simle refrigeration vapour compression cycle. 15
(b) Define human comfort. 5
5. (a) Derive an expression for specific speed of turbine. 10
(b) Explain reciprocating water pumps. 10
SECTION C
6. (a) Explain with neat diagram , multiple clutch. 15
(b) Define different types of gear. 5
7. Explain elastic constants and their relationship. 20
SECTION C
8. Explain NC machine in detail. 20
9. Define manufacturing system and compare NC and CNC machines. 20
Earning: ₹ 4.00/- |