Limited Departmental Competitive examination (LDC) examination (Water supply)

Categories: Interview questions and answers Indian Railway Recruitment Study

Limited Departmental Competitive examination (LDC) examination (Water supply)

 

1. Specific yield of well is

  1. Discharge per unit time
  2. Yield of well per metre of drawdown
  3. Velocity of water per unit time
  4. d)None of the above

Answer) Yield of well per metre of drawdown

 

2.While taking sample of water from well, sample is collected

  1. a)About 2 metre above the bottom of wel
  2. b) About 1 metre above the bottom of well 
  3. c)About 1 metres below the bottom of well
  4. d) none of the above

Answer) About 1 metre above the bottom of well

 

3. While collecting sample of water from tap the

  1. Mouth of tap is heated for 5 minutes
  2. Mouth of tap is heated for 10 minutes
  3. c)Mouth of tap is not heated
  4. d)none of the above

Answer) Mouth of tap is heated for 5 minutes

 

4. Demand of water for passengers on railway station is

  1. a)10 litres per passenger
  2. b)15 litres per passenger
  3. c) 20 litres for passenger
  4. d) 25 litres per passenger

Answer) 25 litres per passenger

 

5. Peak hour demand of water is taken as ---------- times the average daily demand

  1. a)1.5
  2. b)1.9
  3. c)2.25
  4. d)2.75

Answer) 2.25

 

6. The spacing of tube wells should generally be more than ----------from the circle of influence

  1. a)10 metre
  2. b)50 metre
  3. c)100 metre
  4. d) 500 metre

Answer) 100 metre

 

7. The capacity of highest storage tank with efficient standby pump should be higher of the following figures

  1. a)1/4 the maximum water consumption in 24 hours
  2. b)1/3 the normal water consumption in 24 hours
  3. c)1/4 the normal water consumption in 24 hours.
  4. d) a or b
  5. e) b or c
  6. f) a of c

Answer) a or b

 

8. With regard to standard of quality of drinking water as laid down by Indian Railway , the requirement (desirable) limit of total dissolved solids should not be more than---------- mg/l

  1. a)200
  2. b) 300
  3. c) 400
  4. d) 500

Answer) 500

 

9. Chandigarh is a city which has roads generally parallel or perpendicular to each other. The ideal water supply system in such a city should be

  1. Dead and system
  2. Grid Iron system*
  3. Ring system
  4. Any of them

Answer) Grid Iron system

 

10. From distribution main of 40 mm size, number of service pipe of 15 mm size can be taken off are---------

  1. 3
  2. 6
  3. 10
  4. 12

Answer) 12

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