B.TECH - Semester 8 electrical power utilisation and electrical safety Question Paper 2013 (apr)
Practice authentic previous year university questions for better exam preparation.
- What are the various applications of electrolysis?
- 'What are the essential features of refrigeration and air conditioning?
- (a) Explain different types of air conditioning.
- (b) Explain different process involved in air conditioning.
- (a) List the major applications of electrolysis Explain basic principles of electroplating.
- What are the advantages of electric heating?
- State difference between arc welding and resistance weiding
- Explain different electric traction systems
- What do you mean by schedule speed in electric traction?
- What is polar curve and space-height ratio?
- Mention the different types of lighting schemes
- Explain need of grounding in electrical systems
- Explain Fault Current Division Factor and Maximum Grid Current $$ (10 \times 2=20 \text { Marks }) $$ P.T.O. Answer one full question from each module.
- (a) Explain Induction heating. What are the characteristics of induction heating? Explain.
- (b) A 100 KW Ajax Wyatt furnace works at a secondary voltage of 12 V at a power factor 0.6 when fully charged. If the reactance presented by the charge remains constant, but the resistance varies inverse as the charge depth in the furnace, calculate the charge depth that produces maximum heating eff...
- (b) Discuss in detail the Power supply requirements for different electronic processes.
- (a) Assuming a quadrilateral speed time curve, derive an equation for total distance travelled by a train between two spots and velocity at the time of breaking.
- (b) An electric train weighing 200 tonns runs a uniform up gradient of $1 \%$ with the following speed time curve. (i) Uniform acceleration of 2 kmphps for 30 sec . (ii) constant speed for 30 sec (iii) coasting for 30 sec (iv) braking at 2.5 kmphps to rest. (v) stop at station 15 sec . If the tracti...
- (a) What is regenerating breaking system? Derive an expression for energy returned during regeneration.
- (b) An electric train is to have the acceleration and braking retardation of 0.6 kmphps and 3 kmphps respectively. If the ratio of the maximum speed to the average speed is 1.3 and time for stop is 25 sec then determine the scheduled speed for a run of 1.6 km . Assume Simplified trapezoidal speed ti...
- (a) Discuss the Laws of Illumination and its limitation in actual practice.
- (b) A lamp of 500 cp is placed 2 metres below a plain mirror which reflects $80 \%$ of the light falling on it. Determine illumination at a point 5 metres away from the foot of the lamp which is hung 5 metres above the ground. OR
- (a) Explain effects of electric shock on human body. 10
- (b) Explain problems of stray current in distribution system.
- Explain design procedure of ground grid. 20
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