| 1. | Slip of a reciprocating pump is defined as the ? | |
|
ratio of actual discharge to the theoretical discharge
|
||
|
sum of actual discharge and the theoretical discharge
|
||
|
difference of theoretical discharge and the actual discharge
|
||
|
product of theoretical discharge and the actual discharge
|
||
View Answer
Discuss in Forum
Report Question| 2. | The hydraulic efficiency of a reaction turbine, is the ratio of ? | |
|
power produced by the turbine to the energy actually supplied by the turbine
|
||
|
actual work available at the turbine to energy imparted to the wheel
|
||
|
work done on the wheel to the energy (or head of water) actually supplied to the turbine
|
||
|
none of the above
|
||
| 3. | The type of centrifugal pump preferred for a specific speed of 20 r.p.m. is ? | |
|
slow speed pump with radial flow at outlet
|
||
|
medium speed pump with radial flow at outlet
|
||
|
high speed pump with radial flow at outlet
|
||
|
high speed pump with axial flow at outlet
|
||
| 4. | If the ratios of the corresponding forces acting at corresponding points are equal, then model and the prototype are said to have ? | |
|
geometric similarity
|
||
|
kinematic similarity
|
||
|
dynamic similarity
|
||
|
none of these
|
||
| 5. | The specific speed of a turbine is the speed of an imaginary turbine, identical with the given turbine, which ? | |
|
delivers unit discharge under unit head
|
||
|
delivers unit discharge under unit speed
|
||
|
develops unit power under unit head
|
||
|
develops unit power under unit speed
|
||
| 6. | In order to avoid cavitation in centrifugal pumps ? | |
|
the suction pressure should be high
|
||
|
the delivery pressure should be high
|
||
|
the suction pressure should be low
|
||
|
the delivery pressure should be low
|
||
| 7. | Which of the following statement is correct as regard to water wheels ? | |
|
They have slow speeds
|
||
|
They are suitable even for low water heads
|
||
|
They give constant efficiency, even if the discharge is not constant
|
||
|
all of the above
|
||
| 8. | A double overhung Pelton wheel has ? | |
|
two jets
|
||
|
two runners
|
||
|
four jets
|
||
|
four runners
|
||
| 9. | The flow ratio in case of Francis turbine varies from ? | |
|
0.15 to 0.3
|
||
|
0.4 to 0.5
|
||
|
0.6 to 0.9
|
||
|
1 to 1.5
|
||
| 10. | The impeller of a centrifugal pump may have ? | |
|
volute casing
|
||
|
volute casing with guide blades
|
||
|
vortex casing
|
||
|
any one of these
|
||