B.TECH - Semester 7 design of machine elements 2 Question Paper 2013 (dec)
Practice authentic previous year university questions for better exam preparation.
Sample Questions
- Design a connecting rod for four stroke petrol engine with the following data: Diameter of Piston $=8.8 \mathrm{~cm}$, stroke $=12.5 \mathrm{~cm}$, mass of reciprocating parts $=1.9$ kg, length of connecting Rod $=34 \mathrm{~cm}$, R.P.M $=3000$, Com...
- (a) Explain Dilation of Pressure vessels
- What is interference in Gears?
- What is meant by Equivalent number of teeth in Bevel Gear? Derive expression for the same.
- Explain the importance of Bearing Characteristic Number.
- What are the functions of Piston rings and explain the materials used for it.
- Differentiate between thin shell and thick shell. $$ (5 \times 4=20 \text { Marks }) $$
- A pair of $20^{\circ}$ stub in volute tooth spur gear is to transmit 25 KW at a speed of 400 rpm of the pinion. Speed ratio is $1: 3$ the pinion is made of steel, C30 (Heat treated) and the gear is made of cast iron grade 35 (Heat treated). Design th...
- A pair of helical gears is to be transmit 38 KW at 1700 rpm of the pinion. The velocity ratio is to be 4.25 and the helix angle is to be $30^{\circ}$. The gears are subjected to a heavy shock load of 24 hrs per day. Design the pair.
- Design a journal bearing for the following specifications: Speed $=1600 \mathrm{rpm}$, Load $=1300 \mathrm{~N} \mathrm{C} / \mathrm{D}=0.001: \mathrm{L} / \mathrm{D}=1.6 \cdot \mathrm{P}=1.5 \mathrm{bar}$, Operating temperature $=65^{\circ} \mathrm{C...
- A single row deep groove ball bearing is used to support the lay shaft of a fourspeed automobile gearbox. It is subjected to following loads in respective speed ratios: | Gear | Axial load (N) | Radial load(N) | $\%$ time engeged | | :--- | ---: | -...
- A single cylinder double acting steam engine delivers 190 KW at $100 \mathrm{rev} / \mathrm{min}$. The maximum fluctuation of energy per revolution is 14 percent. The speed variation is limited to 1 percent either way from the mean. The mean diameter...
- (b) Derive the expression for calculating power loss in friction in flat pivots.
- (c) The piston rod of a hydraulic cylinder exerts an operating force of 10 kN . The friction due to piston packing and stuffing box is equivalent to $10 \%$ of operating force. The pressure in the cylinder is 10 MPa . The cylinder is made of cast iro...
- A centrifugal clutch transmitting 20 KW at 900 rpm consists of four shoes. The clutch is to be engaged at 500 rpm . The inner radius of the drum is 165 mm . The radius of the centre of gravity of the shoes is 140 mm , when the clutch is engaged. The ...
- A centrifugal clutch transmitting 20 KW at 900 rpm consists of four shoes. The clutch is to be engaged at 500 rpm . The inner radius of the drum is 165 mm . The radius of the centre of gravity of the shoes is 140 mm , when the clutch is engaged. The ...