B.TECH - Semester 7 design of machine elements 2 Question Paper 2019 (jul)
Practice authentic previous year university questions for better exam preparation.
Sample Questions
- Why direct compressive stress is ignored while finding out the strength of the gear tooth?
- Discuss the static load carrying capacity of the rolling element bearing.
- Why a positive clutch is used?
- (a) Why I section is chosen for the connecting rod of an I.C. engine.
- (b) What types of stresses are induced in a crankshaft?
- What are the advantages of centrifugal clutch? Answer any one full questions from each Module. Each question carries 20 marks.
- A micarta pinion rotating at 1200 rpm is to transmit 1 kW to a cast iron gear at a speed of 192 rpm assuming a starting overload of $20 \%$ and using 20 full depth involute teeth. Determine the module, number of teeth on the pinion and gear and face ...
- Design a pair of helical gears to transmit 30 kW power at a speed reduction ratio of $4: 1$. The input shaft rotates at 2000 rpm . Take helix and pressure angles equal to $25^{\circ}$ and $20^{\circ}$ respectively. The number of teeth on the pinion m...
- A journal bearing is to be designed for a centrifugal pump for the following data: Load on the journal $=12 \mathrm{kN}$; Diameter of the journal $=75 \mathrm{~mm}$; Speed $=1440$ r.p.m.; Atmospheric temperature of the oil $=16^{\circ} \mathrm{C}$; ...
- Select a suitable ball bearing to carry a radial load of 10000 N and an axial load of 4000 N . The shaft rotates at 1000 rpm . Average life is 6000 hrs . Inner race rotates. Take mild shock.
- A connecting rod is to be designed for a high speed I.C. Engine. The data available are: Diameter of piston $=90 \mathrm{~mm}$, mass of reciprocating parts $=1.5 \mathrm{~kg}$, length of connecting rod-centre to centre $=350 \mathrm{~mm}$, stroke $=...
- Design a Cl piston for a single acting IC engine having 200 mm as the cylinder bore. The maximum explosion pressure may be taken as $4 \mathrm{~N} / \mathrm{mm}^{2}$. The piston is to have 5 compression rings and one oil ring. The permissible tensile...
- An external pressure of $10 \mathrm{MN} / \mathrm{m}^{2}$ is applied to a thick cylinder having internal diameter as 150 mm and external diameter as 300 mm . if maximum hoop stress permitted on the inside of the wall is $35 \mathrm{MN} / \mathrm{m}^{...
- A multiple disc clutch is composed of 5 steel and 4 bronze disks. The clutch is required to transmit 16 Nm torque. If the inner diameter is restricted to $50 \cdot \mathrm{~mm}$, determine the necessary outer diameter of the disk and axial force. The...