Q 1 b ) |
State any four types of friction clutch, along with its application each. |
4 |
Q 1b)(a)
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Define completely constrained motion and successfully constrained motion with neat sketch. State one example of each. |
4 |
Q 1b)(b)
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State function of clutch. Explain working principle of clutch. |
4 |
Q 2 a ) |
What is a machine ? Differentiate between a machine and a structure. |
4 |
Q 2 a ) |
Differentiate between machine and structure. |
4 |
Q 2 b ) |
Describe with neat sketch the working of scotch yoke mechanism. |
4 |
Q 2 b ) |
Explain with the neat sketch working of crank and slotted lever quick return mechanism. |
4 |
Q 2 c ) |
Explain the inter-relation between linear and angular velocity, linear and angular acceleration with suitable example. |
4 |
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 a link in an I.C. engine mechanism. |
4 |
Q 2 d ) |
Explain the Klein’s construction to determine velocity and acceleration of single slider crank mechanism |
4 |
Q 2 e ) |
Draw the labelled displacement, velocity and acceleration diagrams for a follower when it moves with simple harmonic motion. |
4 |
Q 2 e ) |
Draw the labelled displacement, velocity and acceleration diagrams for a follower when it moves with uniform velocity. |
4 |
Q 2 f ) |
A pulley rotating at 50 m/s transmits 40 kW. The safe pull in belt is 400 N/cm width of belt. The angle of lap is 170º. If coefficient of friction is 0.24, find required width of belt. |
4 |
Q 2 f ) |
A flat belt drive is required to transmit 35 kW from a pulley of 1.5 m effective diameter running at speed of 300 rpm. The angle of contact is spread over 11/24 of the circumference co-efficient of friction for the surface is 0.3. Determine the maximum t |
4 |
Q 3 a ) |
In a four bar chain ABCD, AD is fixed and is 150 mm long. The crank AB is 40 mm long and rotates at 120 r.p.m. clockwise, while the link CD = 80 mm oscillates about D. BC and AB are of equal length. Find the angular velocity of link CD when angle BAD = 60 |
4 |
Q 3 b ) |
In a slider crank mechanism, the length of crank OB and connecting rod AB are 125 mm and 500 mm respectively. The centre of gravity G of the connecting rod is 275 mm from the slider. The crank speed is 600 rpm clockwise. When the crank has turned 45 from |
4 |
Q 3 c ) |
Explain slip and creep phenomenon in belts. |
4 |
Q 3 d ) |
Draw the neat sketch of diaphragm clutch and explain its working. |
4 |
Q 3 e ) |
Write the procedure for balancing of a single rotating mass by single masses rotating in the same plane. |
4 |
Q 3 f ) |
Give detailed classification of followers. |
4 |
Q 4 a ) |
State advantages and disadvantages of chain drive over belt drive |
4 |
Q 4 b ) |
Justify that slider crank mechanism is a modification of the basic four bar mechanism with neat sketch. |
4 |
Q 4 c ) |
Compare flywheel and governor. |
4 |
Q 4 d ) |
Explain with neat sketch construction and working of eddy current dynamometer. |
4 |
Q 4 e ) |
A flat foot step bearing 225 mm in diameter supports a load of 7500 N. If the co-efficient of friction is 0.09 and the shaft rotates at 600 rpm, calculate the power lost in friction. |
4 |
Q 4 f ) |
Four masses attached to a shaft and their respective radii of rotation are given as : m 1 = 180 kg m 2 = 300 kg m 3 = 230 kg m 4 = 260 kg r 1 = 0.2 m r 2 = 0.15 m r 3 = 0.25 m r 4 = 0.3 m The angles between successive masses are 45, 75 and 135. Find th |
4 |