Cochin University of Science and Techology (CUST) 2005-5th Sem B.Tech Fire and Safety Engineering Iester , , SE 402 Safety In Electrical Systems - Question Paper

B. Tech Degree IV Semester Examination, May 2005

&TS(C)- IV -05 OiS(G)

SE 402 SAFETY IN ELECTRICAL SYSTEMS ( 2002 Admissi&u otiwardl)

: 3 Hours    Maximum Marta: 100

(AU questions cany EQUAL marks)

(a)    Denve n cxpreutoa for induced cmf in a single phase transformer.

(b)    With a schematic diagram explain the working of static relay.

OR

(a)    Discuss the comtroctiona) difference ofsaJtent pole and cylindrical rotor alternator*.

(b)    Explain in detail. (be classification of relay*

(a)    Witt) suitable sketches, explain

(i) Pipe earthing

00 Plate earthing

(b)    Illustrate the process of an; extinction aod the constructional features of sulphur hexa fiunde ctrcuh breaJcetv

OR

(a)    Explain bow fuses arc classified. Briefly explain the cntena for tbe selection of (use*.

(b)    Discuss the disadvantages of ungrounded power system. Wtat are ihe different methods used to overcome this?

(a)    Differentiate between Jouls Bum and flash over bum

(b)    With suitable examples, explain the secondary hazards of electnc curreou (e) Explain the generally employed shock prevention methods.

OR

(a)    Eoumerate the fatal accidents that caa result from electnc current.

(b)    Discuss in detail, the effcct of electric current passing thiough human body.

(a)    Explain how the LiX i nd L> bar charts are prepared for the safe installation of a typical EHV sub station.

(b)    Discuss in detail, the unsafe conditions a&d unsafe acts that can be eocouniend daring tbe installation of plant and equipment.

OR

(a)    Enumerate the generally recommend guidelines to ensure safety during the installation work.

(b)    List out the general safety ruks for the commissioning of plant and equipment.

(a)    Explain in detail, ihe types of protection employed for electrical equipment used in hazardous areas.

(b)    Last out the ciectncaJ equipment (hst are prone to electrical fire and discuss tbe possible causes in each case.

OR

(a)    What arc tbe hazards associated with static electricity? Explain

(b)    List out tbe important safety provisions in Indians Electricity Act sed Rules .

x

Attachment: cochin-university-of-science-and-techology--cust--2005-b-tech-fire-and-safety-engineering-37191-1.jpg

Earning:   Approval pending.