A:-difficult hardness
B:-stiff hardness
C:-permanent hardness
D:-tough hardness
C:-permanent hardness
D:-tough hardness
Correct Answer:- Option-C
2:-Galvanized iron is coated with .....
A:-Copper
B:-Lead
C:-Zinc
D:-Tin
B:-Lead
C:-Zinc
D:-Tin
Correct Answer:- Option-C
3:-What you should be sure you have in plenty before considering buying a solar water heater
A:-abundant sunshine
B:-very hot water
C:-intermittent rain
D:-all of the above
B:-very hot water
C:-intermittent rain
D:-all of the above
Correct Answer:- Option-A
4:-There are two primary chemicals used to purify water namely .....
A:-iodine and chlorine
B:-sodium and chlorine
C:-chlorine and fluorine
D:-fluorine and iodine
B:-sodium and chlorine
C:-chlorine and fluorine
D:-fluorine and iodine
Correct Answer:- Option-A
5:-Which material is used for joining C.I. Pipes?
A:-Lead and cement
B:-Lead and lead wool
C:-Zinc and lead wool
D:-Copper and hemp yarn
B:-Lead and lead wool
C:-Zinc and lead wool
D:-Copper and hemp yarn
Correct Answer:- Option-B
6:-What is used at the junction of house sewer and municipal sewer?
A:-nahni trap
B:-P. trap
C:-Intercepting trap
D:-S. trap
B:-P. trap
C:-Intercepting trap
D:-S. trap
Correct Answer:- Option-C
7:-What is used to overcome siphonic action
A:-anti siphonage pipe
B:-vent pipe
C:-coupler
D:-vent cowl
B:-vent pipe
C:-coupler
D:-vent cowl
Correct Answer:- Option-A
8:-What happens if cast iron pipes are coated with cool tar
A:-loose strength
B:-prevent corrosion
C:-dos not sag
D:-dos not fig
B:-prevent corrosion
C:-dos not sag
D:-dos not fig
Correct Answer:- Option-B
9:-Which component in gully trap is used to prevent gases from entering waste line
A:-air seal
B:-C.I. cover
C:-water seal
D:-C.I. grating
B:-C.I. cover
C:-water seal
D:-C.I. grating
Correct Answer:- Option-C
10:-Which accessories is used to change the direction flow in the pipe .....
A:-water meter
B:-pipe
C:-cocks
D:-fittings
B:-pipe
C:-cocks
D:-fittings
Correct Answer:- Option-D
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