|
Q a)(ii)
|
Explain single cylinder 4-stroke I.C. engine using turning moment diagram. |
4 |
|
Q 1a)(a)
|
Represent ‘Brayton Cycle’ on P-V and T-S diagram. |
4 |
|
Q 1a)(b)
|
Define following terms w.r.t. air compressor............. |
4 |
|
Q 1a)(c)
|
Enlist different uses of compressed air. |
4 |
|
Q 1a)(d)
|
Draw ‘Valve timing diagram for 4-stroke cycle diesel engine. |
4 |
|
Q 1a)(i)
|
Enlist the types of constrained motion. Draw a label sketch of any one |
2 |
|
Q 1a)(ii)
|
Define (i) Pressure angle (ii) Pitch point related to cam. |
2 |
|
Q 1a)(iii)
|
How are mechanical drives classified? |
2 |
|
Q 1a)(iv)
|
Define: (i) Coefficient of fluctuation of speed. (ii) Coefficient of fluctuation of energy. |
2 |
|
Q 1a)(v)
|
Write any two disadvantages of chain drive. |
2 |
|
Q 1a)(vi)
|
Draw line diagram of porter governor |
2 |
|
Q 1a)(vii)
|
State the application of (i) Disc brake (ii) Internal expanding brake |
2 |
|
Q 1a)(viii)
|
Why is balancing of rotating parts necessary for high speed engines? |
2 |
|
Q 1b)(a)
|
Explain in brief, how ‘Morse test’ is carried out ? |
6 |
|
Q 1b)(b)
|
Explain with neat sketch the constructional features of ‘Three Way Catalytic Converter’. |
6 |
|
Q 1b)(i)
|
State inversions of double slider crank chain. Explain Oldham's coupling with neat sketch |
4 |
|
Q 1b)(ii)
|
The shaft running at 125 r.p.m. transmits 440 kW. Find the diameter of shaft (d) if allowable shear stress in shaft material is 55 N/mm2 and the angle of twist must not be more than 1 on a length of 16(d). The modulus of rigidity G = 0.80 105 N/mm |
6 |
|
Q 1b)(ii)
|
Explain: (i) Uniform pressure theory. (ii) Uniform wear theory in clutches and bearing. |
4 |
|
Q 1b)(iii)
|
Compare cross belt drive and open belt drive on the basis of: (i) Velocity ratio. (ii) Direction of driven pulley. (iii) Length of belt drives (iv) Application. |
4 |
|
Q 1b)(l)
|
What is stress concentration ? State the remedial measures to control the effect of stress concentration with neat sketches |
6 |
|
Q 1 i ) |
Draw stress-strain diagram for ductile material stating salient points |
4 |
|
Q 1 ii ) |
Write the design procedure for turn buckle. (Any four steps) |
4 |
|
Q 1 iii ) |
State any four factors to be considered while selecting the coupling. |
4 |
|
Q 1 iv ) |
Why square threads are preferred over V-thread for power transmission ? |
4 |
|
Q 2 a ) |
t is desired to compress 15 m3 of air per minute from 1.0132 bar to 10 bar. Calculate minimum power required to drive........ |
8 |
|
Q 2 a ) |
Draw a labeled sketch of quick return mechanism of shaper and explain its working.... |
4 |
|
Q 2a)(i)
|
State any four factors that govern ‘factor of safety’. |
8 |
|
Q 2a)(ii)
|
Why taper is provided on cotter ? State recommended values of taper. |
8 |
|
Q 2 b ) |
Draw neat sketch showing the details of cotter joint. State strength equations for each component with suitable failure cross-sectional area. |
8 |
|
Q 2 b ) |
Represent following processes on Psychrometric chart............ |
8 |
|
Q 2 b ) |
What are the types of kinematic pair ? Give its examples. .............MSBTE TOM SUMMER 2016 Q 2 b |
4 |
|
Q 2 c ) |
A belt pulley is fastened to a 90 mm diameter shaft running at 300 r.p.m. by means of a key 20 mm wide and 140 mm long. Allowable stress for the shaft and key material are 40 N/mm2 in shear and 100 N/mm2 in crushing. Find the power transmitted and the dep |
8 |
|
Q 2 c ) |
Following observations were made during a trial on 4-stroke, single cylinder engine...... |
8 |
|
Q 2 c ) |
Define linear velocity, angular velocity, absolute velocity and state the relation between linear velocity and angular velocity. |
4 |
|
Q 2 d ) |
Explain the Klein's construction to determine velocity and acceleration of single slider crank mechanism. |
4 |
|
Q 2 e ) |
Draw neat sketch of radial cam with follower and show on it (i) Base circle. (ii) Pitch point. (iii) Prime Circle. (iv) Cam profile |
4 |
|
Q 2 f ) |
Problem : A shaft runs at 80 rpm & drives another shaft at 150 rpm through belt drive......... |
4 |
|
Q 3 a ) |
State any four advantages of standardization. |
4 |
|
Q 3 a ) |
In a slider-crank mechanism, the crank is 480 mm long and rotates at 20 rad/sec in the counter-clockwise direction............ |
4 |
|
Q 3 b ) |
Draw a neat sketch of bell crank lever. Enlist steps in designing the bell crank lever |
4 |
|
Q 3 b ) |
Classify gas turbine on the basis of..... |
4 |
|
Q 3 b ) |
In a slider crank mechanism, crank AB = 20 mm & connecting rod BC = 80 mm. Crank AB rotates with uniform speed of 1000 rpm in anticlockwise direction....... |
4 |
|
Q 3 c ) |
Prove that, for a square key, the permissible crushing stress is twice the permissible shear stress. |
4 |
|
Q 3 c ) |
Enlist the four effects of subcooling on the performance of V.C.C. refrigeration cycle. |
4 |
|
Q 3 c ) |
Explain epicyclic gear train with neat sketch. |
4 |
|
Q 3 d ) |
Why a coupling should be placed as close to a bearing as possible |
4 |
|
Q 3 d ) |
What is ‘Scavenging’ ? List any two types of ‘scavenging’. |
4 |
|
Q 3 d ) |
Draw a labelled sketch of multiplate clutch and state its applications. |
4 |
|
Q 3 e ) |
Write the procedure of balancing single rotating mass when it balance mass is rotating in the same plane as that of disturbing mass. |
4 |
|
Q 3 e ) |
Describe ‘bolt of uniform strength’ with neat sketch |
4 |
|
Q 3 e ) |
Explain in brief the importance of ‘Super Charging’. |
4 |
|
Q 3 f ) |
What are the different types of follower motion ? Also draw displacement diagram for uniform velocity. |
4 |
|
Q 4a)(a)
|
Explain in brief the constructional features of MPFI engine |
4 |
|
Q 4a)(b)
|
An engine has piston diameter 15 cm, length of stroke 40 cm and mean effective pressure 5 bar......... |
4 |
|
Q 4a)(c)
|
State any four effect of detonation............ |
4 |
|
Q 4a)(d)
|
Explain the term w.r.t. I.C. engine............ |
4 |
|
Q 4a)(i)
|
Define Endurance limit and draw typical S-N curve for steel. |
4 |
|
Q 4a)(ii)
|
State the effect of key-way on the strength of shaft with suitable diagram |
4 |
|
Q 4a)(iii)
|
State any four applications of spring. |
4 |
|
Q 4a)(iii)
|
State any four advantages and disadvantages of welded joints over riveted joints. |
4 |
|
Q 4 b ) |
Justify with neat sketch elliptical trammel as an inversion of double slider crank chain. |
4 |
|
Q 4b)(a)
|
Name any four additives used in lubricants ? State their advantages...... |
6 |
|
Q 4b)(b)
|
A petrol engine working on constant volume cycle has compression ratio....... |
6 |
|
Q 4b)(i)
|
Describe the importance of aesthetic considerations in design related to shape, colour and surface finish. |
6 |
|
Q 4b)(ii)
|
State any six design considerations while designing the spur gear |
6 |
|
Q 4 c ) |
Differentiate between flywheel and governor. |
4 |
|
Q 4 d ) |
Explain construction and working of eddy current dynamometer. |
4 |
|
Q 4 e ) |
A multiplate disc clutch transmits 55 kW.............. |
4 |
|
Q 4 f ) |
A rotor having the following properties......... |
4 |
|
Q 5 a ) |
In a slider crank mechanism shown in figure 1................ |
8 |
|
Q 5 a ) |
A screw jack is used to lift a load of 50 kN through a maximum lift of 200 mm. The material used for a screw is steel of allowable stresses in tension and compression as 100 N/mm2 and 50 N/mm2 respectively. The pitch of screw is 8 mm. The nut is made of p |
8 |
|
Q 5 a ) |
Explain with neat block diagram the working of ‘Vapour Absorbtion Cycle’....... |
8 |
|
Q 5 a ) |
Law of gearing |
4 |
|
Q 5 b ) |
Draw the profile of cam operating a roller reciprocating follower .......... |
8 |
|
Q 5 b ) |
A railway wagon having 1500 kg mass and moving at 1 m/s velocity dashes against a bumper consisting of two helical springs of spring index 6. The springs, which get compressed by 150 mm while resisting a dash made of spring steel having allowable shear st |
8 |
|
Q 5 b ) |
What do you mean by ‘Perfect Intercolling’ ? Explain with the help of P.V. diagram. |
8 |
|
Q 5 c ) |
Two parallel shafts, connected by a crossed belt,..... |
8 |
|
Q 5 c ) |
Explain the working of ‘Turbo-Prop’ engine with neat sketch............... |
8 |
|
Q 5c)(i)
|
Show that the efficiency of self locking screw is less than 50% |
8 |
|
Q 5c)(ii)
|
State any four advantages of ball bearings over plain journal bearings. |
8 |
|
Q 6 ) |
Draw a neat sketch of leaf spring of semi-elliptical type and name its parts. |
4 |
|
Q 6 a ) |
State the following term... |
4 |
|
Q 6a)(i)
|
Explain sleep and creep phenomenon in belts. |
4 |
|
Q 6a)(ii)
|
Explain single cylinder 4-stroke I.C. engine using turning moment diagram. |
4 |
|
Q 6 b ) |
A simple band brake shown in figure 2 is applied to a shaft carrying a flywheel of mass 250 kg.......... |
8 |
|
Q 6 b ) |
Square thread |
4 |
|
Q 6 b ) |
Why majority of air compressors available in the market are multi........... |
4 |
|
Q 6 c ) |
A conical pivot with angle of cone as 100.......... |
8 |
|
Q 6 c ) |
Determine the size of bolt in the cylinder head of a steam engine. The engine cylinder has a bore of 400 mm and the maximum steam pressure to which the cylinder is subjected is 1.5 N/mm2 . Cylinder head is held on the cylinder by 16 number of bolts. The p |
4 |
|
Q 6 c ) |
Represent Carnot cycle on P-V and T-S diagram |
4 |
|
Q 6 d ) |
State any four disadvantages of rolling bearings as compared to journal bearings |
4 |
|
Q 6 d ) |
Compare between window air conditioner............. |
4 |
|
Q 6 e ) |
Explain any one method to improve thermal efficiency of gas............ |
4 |
