A:-coupling
B:-nipple
C:-union
D:-plugs
B:-nipple
C:-union
D:-plugs
Correct Answer:- Option-A
2:-Pipe wrench is used for pipes of diameter.....
A:-less than 15 mm
B:-more than 150 mm
C:-50 mm to 150 mm
D:-15 mm to 50 mm
B:-more than 150 mm
C:-50 mm to 150 mm
D:-15 mm to 50 mm
Correct Answer:- Option-D
3:-If the globe valve begins to leak between the packing nut and valve steam .....
A:-gland nut to be replaced
B:-packing to be replaced
C:-valve steam to be replaced
D:-Bonnet to be replaced
B:-packing to be replaced
C:-valve steam to be replaced
D:-Bonnet to be replaced
Correct Answer:- Option-B
4:-the lower most level or surface of a sewer is known as .....
A:-invert
B:-bedding
C:-benching
D:-drain
B:-bedding
C:-benching
D:-drain
Correct Answer:- Option-A
5:-What process is used to remove permanent hardness in water .....
A:-purification process
B:-coagulation process
C:-base exchange process
D:-sedimentation process
B:-coagulation process
C:-base exchange process
D:-sedimentation process
Correct Answer:- Option-C
6:-Dug wells are also known as .....
A:-draw wells
B:-tube wells
C:-driven wells
D:-artesian wells
B:-tube wells
C:-driven wells
D:-artesian wells
Correct Answer:- Option-A
7:-What should be done to remove tapped air in centrifugal pump .....
A:-packing
B:-washing
C:-use booster pump
D:-priming
B:-washing
C:-use booster pump
D:-priming
Correct Answer:- Option-D
8:-What is provided in elevated storage reservoir for circulation of air .....
A:-manhole
B:-ventilator
C:-float gauge
D:-over flow pipe
B:-ventilator
C:-float gauge
D:-over flow pipe
Correct Answer:- Option-B
9:-What type of bacteria treats waste in percolation area?
A:-fungi
B:-anaerobic
C:-aerobic
D:-lime
B:-anaerobic
C:-aerobic
D:-lime
Correct Answer:- Option-C
10:-The cistern which is operated by a chain is called .....
A:-Ball type cistern
B:-Bell type cistern
C:-Pull type cistern
D:-Push type cistern
B:-Bell type cistern
C:-Pull type cistern
D:-Push type cistern
Correct Answer:- Option-B
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