<bgsound loop='infinite' src='music.mp3'></bgsound> Department of Mechanical Engineering (KPES): November 2014

Thursday, November 13, 2014

Machine Tools

KITE COLLEGE OF PROFESSIONAL ENGINEERING SCIENCES
DEPARTMENT OF MECHANICAL ENGINEERING
MID-2 QUESTION PAPER (3-1)
SUB: MACHINE TOOLS                                   TIME 1 hr                                                             MARKS: 10
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1) Sketch and describe a rotary table of continuous milling machine stating is main advantages.
2) A) what is meant by grinding? Explain.
b) What are rotary table surface grinders? Explain their working.
3) Give a neat sketch of an internal pull type broach and indicate the various terms relative to its teeth. Describe these terms in brief.
4) What is the principle of six-point location? Explain.



KITE COLLEGE OF PROFESSIONAL ENGINEERING SCIENCES
DEPARTMENT OF MECHANICAL ENGINEERING
MID-2 QUESTION PAPER (3-1)
SUB: MACHINE TOOLS                                   TIME 1 hr                                                             MARKS: 10
---------------------------------------------------------------------------------------------------------------------------------
1) Sketch and describe a rotary table of continuous milling machine stating is main advantages.
2) A) what is meant by grinding? Explain.
b) What are rotary table surface grinders? Explain their working.
3) Give a neat sketch of an internal pull type broach and indicate the various terms relative to its teeth. Describe these terms in brief.
4) What is the principle of six-point location? Explain.


MSE

KITE COLLEGE OF PROFESSIONAL ENGINEERING SCIENCES
DEPARTMENT OF MECHANICAL ENGINEERING
MID-2 QUESTION PAPER (3-1)
SUB: MACHINE TOOLS                                   TIME 1 hr                                                             MARKS: 10
---------------------------------------------------------------------------------------------------------------------------------
1)      Explain need for a comparator and its principle
.
2)      What are the advantages sigma comparators?

3)      What is a drunken thread explain.

4)      Describe surface coating process.




KITE COLLEGE OF PROFESSIONAL ENGINEERING SCIENCES
DEPARTMENT OF MECHANICAL ENGINEERING
MID-2 QUESTION PAPER (3-1)
SUB: MACHINE TOOLS                                   TIME 1 hr                                                             MARKS: 10
---------------------------------------------------------------------------------------------------------------------------------
5)      Explain need for a comparator and its principle
.
6)      What are the advantages sigma comparators?

7)      What is a drunken thread explain.

8)      Describe surface coating process.


DOM

KITE COLLEGE OF PROFESSIONAL ENGINEERING AND SCIENCES
DEPARTMENT OF MECHANICAL
III B.Tech II MID Examination
Sub:  DOM                                                                                                                                                           Date:
Branch: MECH                                                       Time: 1hr                                                                                                                                        Max marks: 10
Answer any Two questions                                                                                                                              2x5=10 M                                                                                    
1. The turning moment curve for an engine is represented by the equation, T = (20 000 + 9500 sin 2θ – 5700 cos 2θ) N-m, where θ is the angle moved by the crank from inner dead centre. If the resisting torque is constant, find: 1. Power developed by the engine ; 2. Moment of inertia of flywheel in kg-m2, if the total fluctuation of speed is not exceed 1% of mean speed which is 180 r.p.m; and 3. Angular acceleration of the flywheel when the crank has turned through 45° from inner dead centre.

2. The turning moment diagram of a four stroke engine may be assumed for the sake of simplicity to be represented by four triangles in each stroke. The areas of these triangles are as follows: Suction stroke = 5 × 10–5 m2; Compression stroke = 21 × 10–5 m2; Expansion stroke =
85 × 10–5 m2; Exhaust stroke = 8 × 10–5 m2. All the areas excepting expression stroke are negative. Each m2 of area represents 14 MN-m of work. Assuming the resisting torque to be constant, determine the moment of inertia of the flywheel to keep the speed between 98 r.p.m. and 102 r.p.m. Also find the size of a rim-type flywheel based on the minimum material criterion, given that density of flywheel material is 8150 kg/m3 ; the allowable tensile stress of the flywheel material is 7.5 MPa. The rim cross-section is rectangular; one side being four times the length of the other.

3. Derive the equation for hartnell governor


4. A shaft carries four masses A, B, C and D of magnitude 200 kg, 300 kg,400 kg and 200 kg respectively and revolving at radii 80 mm, 70 mm, 60 mm and 80 mm in planes measured from A at 300 mm, 400 mm and 700 mm. The angles between the cranks measured anticlockwise are A to B 45°, B to C 70° and C to D 120°. The balancing masses are to be placed in planes X and Y. The distance between the planes A and X is 100 mm, between X and Y is 400mm and between Y and D is 200 mm. If the balancing masses revolve at a radius of 100 mm, find their magnitudes and angular positions.

ATD 2

KITE COLLEGE OF PROFESSIONAL ENGINEERING AND SCIENCES
DEPARTMENT OF MECHANICAL ENGG,
III B.Tech II MID Examination
Sub: ATD-II                                                                                                    Date:
Branch: MECH                                     Time: 1hr                             Max marks: 10

Answer any Two questions                                                                                     2x5=10 M

1.      (a)  Mention importance of steam condenser and give the difference between jet condenser and
       surface condenser.
(b) Explain with neat sketch down flow surface condenser?
2.      (a) Mention any few points of comparison between impulse and reaction turbine.
(b) Define degree of reaction? And prove it is 50% for reaction turbine.
3.      (a) What is compounding? and why compounding is required?
(b) Explain with neat sketch
(i) Velocity compounding. (ii)  Pressure compounding and
(iii) Pressure - velocity compounding.
4.      (a) Explain methods to improve gas turbine cycle efficiency.
(b) A gas turbine consists of two stage compressor with perfect intercooler and a single stage
       turbine. If the plant works between the temperature limits of 300K and 1000K and 1 bar and
      16 bar. Find the net power of the plant per kg of air. Take CP=1 KJ/kg K.

KITE COLLEGE OF PROFESSIONAL ENGINEERING AND SCIENCES
DEPARTMENT OF MECHANICAL ENGG,
III B.Tech II MID Examination
Sub: ATD-II                                                                                                      Date:
Branch: MECH                                       Time: 1hr                             Max marks: 10

Answer any Two questions                                                                                     2x5=10 M

1.      (a)  Mention importance of steam condenser and give the difference between jet condenser and
       surface condenser.
(b) Explain with neat sketch down flow surface condenser?
2.      (a) Mention any few points of comparison between impulse and reaction turbine.
(b) Define degree of reaction? And prove it is 50% for reaction turbine.
3.      (a) What is compounding? and why compounding is required?
(b) Explain with neat sketch
(i) Velocity compounding. (ii)  Pressure compounding and
(iii) Pressure - velocity compounding.
4.      (a) Explain methods to improve gas turbine cycle efficiency.
(b) A gas turbine consists of two stage compressor with perfect intercooler and a single stage
       turbine. If the plant works between the temperature limits of 300K and 1000K and 1 bar and

      16 bar. Find the net power of the plant per kg of air. Take CP=1 KJ/kg K.