Axial flow pump is started with its delivery valve________________?
(A) kept fully closed
(B) kept fully open
(C) irrespective of any position
(D) kept 50% open
(D) none of the above
One horsepower is equal to_________________?
(A) 102 watts
(B) 75 watts
(C) 550 watts
(D) 736 watts
(D) 33000 watts
In a single casing, multistage pump running at constant speed, the capacity rating is to be slightly lowered. It can be done by_______________?
(A) designing new impeller
(B) trimming the impeller size to the required size by machining
(C) not possible
(D) some other alterations in the impeller
(D) none of the above
Multistage centrifugal pumps are used to obtain___________________?
(A) high discharge
(B) high head
(C) pumping of viscous fluids
(D) high head and high discharge
(D) high efficiency
When a piping system is made up primarily of vertical lift and very little pipe friction, the pump characteristics should be _________________?
(A) horizontal
(B) nearly horizontal
(C) steep
(D) first rise and then fall
(D) none of the above
Indicator diagram of a reciprocating pump is a graph between________________?
(A) flow vs swept volume
(B) pressure in cylinder vs swept volume
(C) flow vs speed
(D) pressure vs speed
(D) swept volume vs speed
Medium specific speed of a pump implies it is_________________?
(A) centrifugal pump
(B) mixed flow pump
(C) axial flow pump
(D) any one of the above
(D) none of the above
Motion of a liquid in a volute casing of a centrifugal pump is an example of____________________?
(A) rotational flow
(B) radial
(C) forced spiral vortex flow
(D) forced cylindrical vortex flow
(D) spiral vortex flow
For small discharge at high pressure, following pump is preferred_____________________?
(A) centrifugal
(B) axial flow
(C) mixed flow
(D) propeller
(D) reciprocating
Low specific speed of a pump implies it is____________________?
(A) centrifugal pump
(B) mixed flow pump
(C) axial flow pump
(D) any one of the above
(D) none of the above