ASKWB

PROFESSIONAL EXAMINATION FOR ASSISTANT ENGINEER (ELECTRICAL) OF THE PUBLIC WORKS DEPARTMENT AND ASSISTANT & SUB-ASSISTANT ENGINEERS (ELECTRICAL) OF THE IRRIGATION & WATERWAYS DEPARTMENT
May, 2011
Time Allowed : 3 Hours
Full Marks : 100
Pass Marks : 60
1. Write short notes on:
(a) vacuum circuit Breaker.
(b) Safety features of an Automatic Passenger Lift.
(c) Dedicated Earthing.
(d) Dry type transformer. (5×4)
2. (a) For what purpose W. B. F. Nos. 2911(1) and 2908 are used?
(b) What is the difference between ‘Supplementary item’ and ‘in-lieu item’?
(c) What do you mean by extra-ordinary Leave and Special disability leave?
(d) What is the difference between Earnest money and Security deposit? (5×4)
3. (a) What is transfer grant and packing allowance?
(b) What is annual performance report? By which date annual report should be submitted?
(c) What is Survey Report?
(d) What is Stock account and Site account? (5×4)
4. (a) What is the desirable range of PH as per CPHEEO?
(b) What is the desirable range of Turbidity as per CPHEEO?
(c) Describe shortly different processes for treatment of water in a conventional water treatment pump.
(d) What do you mean by positive Displacement Pumps? Give examples. (5×4)
5. A 300 mm x 200 mm dia Tube Well is bored and yield test results obtained is 10000 gallon per hour at a draw down of 5 feet. The static water level measured with the help of depth gauge as 35 feet. What should be the type of_pumping machinery selected for obtaining water from the tube-well? Calculate total head requirement of the installed pumping machinery if the pump has to operate against a head of 20 Mts. Calculate also the rating of prime-mover if hydraulic efficiency of pump is 73% and that of motor is 92% at rated duty point. (20)