B.TECH - Semester 8 electrical power utilisation and electrical safety Question Paper 2013 (apr)
Practice authentic previous year university questions for better exam preparation.
Sample Questions
- What are the advantages of electric heating?
- State difference between arc welding and resistance weiding
- What are the various applications of electrolysis?
- 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
- 'What are the essential features of refrigeration and air conditioning?
- 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 ...
- (a) List the major applications of electrolysis Explain basic principles of electroplating.
- (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 t...
- (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 ...
- (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 different types of air conditioning.
- (b) Explain different process involved in air conditioning.
- (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