| Before starting the centrifugal pumps, usually they require priming. Priming is the process of |
A) removing the trapped air from the pump
B) removing the trapped air from the pump and filling it completely with water
C) lubricating the motor of the pump with oil
D) adjusting the electric current flow for getting the desired rotational speed of the pump
| Reciprocating pumps are suitable for |
A) low discharge and high head
B) high discharge and low head
C) high discharge and high head
D) low discharge and low head
| High lift multi-stage centrifugal pumps work against a head of |
A) < 15 m
B) 15 – 20 m
C) 20 – 40 m
D) > 40 m
| Two identical pumps operating in parallel |
A) boosts the discharge
B) boosts the head
C) boosts both the discharge and head
D) delivers same discharge and head that of single pump
| _____ are those which are capable of working under heads less than 30 m. |
A) Low head turbine
B) Medium head turbine
C) High head turbine
D) None of above
| Centrifugal pump is a type of |
A) roto-dynamic pump
B) displacement pump
C) reciprocating pump
D) rotary type pump
| The maximum permissible suction lift for centrifugal pump in practice is |
A) 20 feet
B) 32 feet
C) 40 feet
D) 49 feet
| Two identical pumps, each capable of delivering 0.2 cumec, against a head of 30 m, are connected in parallel. The resulting discharge will be |
A) 0.4 cumec against a head of 30 m
B) 0.4 cumec against a head of 60 m
C) 0.2 cumec against a head of 30 m
D) 0.2 cumec against a head of 60 m
| Hydraulic ram is a kind of pumping arrangement which uses the principle of |
A) water hammer pressure
B) positive displacement
C) negative displacement
D) sudden suction
| Which of the following part of Pelton turbine actively helps in meeting the variable demand of power? |
A) Breaking jet
B) Nozzle spear arrangement
C) Runner and bucket
D) None of above
