Mahatma Gandhi University (MGU) 2009 B.Tech Electrical and Electronics Engineering Basic Mechanical Engineering - Question Paper

G 5815

B.TECH. DEGREE EXAMINATION, APRIL/MAY 2009
(First and 2nd semester)

Basic Mechanical Engineering
(Common for all Branches)

Time: three hours ; maximum: 100 marks
-------------------------------------------------------
ans all ques..
Part A [10 x four = 40 marks]

01. What is the difference ranging from intensive and extensive properties ? provide examples.

02. Briefly discuss the 1st legal regulations of thermodynamics.

03. What is the function of a carburetter ?

04. provide the advantages and disadvantages of air refrigeration.

05. elaborate the various kinds of gears? What is a reverted gear train ?

06. What is slip in belt drives ? What is its effect on velocity ratio?

07. Differentiate ranging from impulse and reaction turbines.

08. How do you choose a hydraulic turbine based on head available?

09. List the various operations that can be performed on a lathe.

10. elaborate the common defects that are seen in sand casting?

---------------------------------------
Part B. [5 x 12 = 60 marks].

11.
(a) Derive the expressions for work done in a (a) isothermal process, (b) polytropic process.

OR

(b) discuss the Carnot cycle and provide its significance. find an expression for the efficiency of the Carnot cycle.

12.
(a) discuss the working of a 4-stroke diesel engine with the help of sketches.

OR

(b) With the help of a diagram discuss vapour absorption refrigeration systems.

13.
(a) An open belt drive transmits 36kW with a belt velocity of 5m/s. Determine the tensions on every side of the belt, if the co-efficient of friction is 0.3 and the angle of lap is 180 degree.

OR

(b) provide the comparison listing the fields of application of flat belt, V-belt, gear and rope drives.

14.
(a) discuss the working of a steam turbine. What is compounding in steam turbines ?

OR

(b) discuss the different non-conventional sources of energy. provide their merits and limitations.

15.
(a) What is rolling process ? With the help of sketches ,explain 2 high, 3 high, and 4 high rolling mills.

OR

(b) elaborate the classifications of milling machines ? With a sketch discuss the various parts of a horizontal milling machine.

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

Earning:   Approval pending.