# Engineering/Hydraulic Machines MCQs Set-2 Sample Test,Sample questions

## Question: ```Among the following which turbine has least efficiency? ```

1.Pelton turbine

2.Kaplan turbine

3.Francis turbine

4.Propeller turbine

Posted Date:-2022-07-27 10:47:55

## Question: ```Among the following which turbine requires more head? ```

1.Pelton Turbine

2.Kaplan Turbine

3.Francis turbine

4.Tube Turbine

Posted Date:-2022-07-27 09:36:16

## Question: ```Calculate work done by jet per second on the runner where, discharge=0.7cubic meters/s, inlet and outlet whirl velocities be 23.77 and 2.94? ```

1.200Kw

2.150Kw

3.187Kw

4.250Kw

Posted Date:-2022-07-27 10:42:47

## Question: ```Design of Pelton wheel means the following data is to be determined. ```

1.Width of buckets

2.Depth of buckets

3.Number of buckets

4.All of the mentioned

Posted Date:-2022-07-27 10:20:25

## Question: ```Find the diameter of jet D, if jet ratio m and diameter of jet d are given as 10 and 125mm. ```

1.1.25 meters

2.1.5 meters

3.2 meters

4.1.2 meters

Posted Date:-2022-07-27 10:22:43

## Question: ```Head lost due to friction is given by k*f*L*v*v/D*2g where f- friction coefficient, L- length of pen stock, D- diameter of penstock andâ€ kâ€ is constant and its value is ____________ ```

1.2

2. 3

3.4

4.5

Posted Date:-2022-07-27 10:09:20

## Question: ```Head under which Francis turbine is operated? ```

1.10-70 meters

2.70-100 meters

3.100-200 meters

4.40-600 meters

Posted Date:-2022-07-27 10:05:54

## Question: ```Head under which Kaplan turbine is operated______ ```

1.10-70 meters

2.70 -100 meters

3.100-200 meters

4.Above 200 meters

Posted Date:-2022-07-27 10:05:23

## Question: ```If diameter of jet is 85mm and diameter of runner is 1.5 meter then calculate number of buckets on Pelton wheel approximately ```

1.20

2.22

3.23

4. 25

Posted Date:-2022-07-27 10:27:36

## Question: ```If diameter of jet is 85mm and diameter of runner is 1.5 meter then calculate width of buckets. ```

1.400mm

2.500mm

3. 420mm

4.425mm

Posted Date:-2022-07-27 10:26:28

## Question: ```If diameter of jet is 85mm and diameter of runner is 1.5 meter then depth of buckets is ___________ ```

1.100mm

2.105mm

3.106mm

4.102mm

Posted Date:-2022-07-27 10:27:01

## Question: ```In most of cases the value of jet ratio is _______________ ```

1.10

2.11

3.12

4.13

Posted Date:-2022-07-27 10:24:45

## Question: ```In Pelton turbine product of mechanical efficiency and hydraulic efficiency is known as _____________ ```

1.Mechanical efficiency

2.Volumetric efficiency

3.Hydraulic efficiency

4.Overall efficiency

Posted Date:-2022-07-27 10:47:22

## Question: ```In Pelton turbine the energy available at inlet of runner that is at outlet of nozzle is known as ```

1.Shaft power

2.Runner power

3.Output power

4.Water power

Posted Date:-2022-07-27 10:37:44

## Question: ```In Pelton turbine the ratio of volume available at shaft of turbine and power supplied at the inlet of the turbine is _______ ```

1.Mechanical efficiency

2.Volumetric efficiency

3.Hydraulic efficiency

4.Overall efficiency

Posted Date:-2022-07-27 10:49:28

## Question: ```In Pelton turbine ___________ is defined as ratio between power delivered to runner and power supplied at inlet of turbine. ```

1.Mechanical efficiency

2.Volumetric efficiency

3.Hydraulic efficiency

4.Overall efficiency

Posted Date:-2022-07-27 10:46:06

## Question: ```In Pelton turbines the expression for power delivered at inlet to runner is given by __________ ```

1.W*[Vw1+Vw2]u/g

2.W*[Vw1-Vw2]u/g

3.W*[Vw1+Vw2]u/g, W*[Vw1-Vw2]u/g

4.[Vw1+Vw2]u/g

Posted Date:-2022-07-27 10:38:34

## Question: ```In Pelton wheel if angle of deflection is not mentioned then we assume it as______________ ```

1.150 degrees

2.200 degrees

3.165 degrees

4.185 degrees

Posted Date:-2022-07-27 10:18:21

## Question: ```In Pelton wheel, if outlet velocity angle of jet is â€œacute angledâ€ then outlet whirl velocity of jet is ______________ ```

1.x- component of V(r2) â€“ blade velocity

2.x- component of V (r2) + blade velocity

3.Blade velocity â€“ x- component of V (r2)

4.Zero

Posted Date:-2022-07-27 10:15:14

## Question: ```In Pelton wheel, if outlet velocity angle of jet is â€œobtuseangledâ€ then outlet whirl velocity of jet is _____________ ```

1.x- component of V (r2) â€“ blade velocity

2.x- component of V (r2) + blade velocity

3.Blade velocity â€“ x- component of V (r2)

4.Zero

Posted Date:-2022-07-27 10:15:57

## Question: ```In Pelton wheel, if outlet velocity angle of jet is â€œright angledâ€ then outlet whirl velocity of jet is __________ ```

1.x- component of V (r2) â€“ blade velocity

2.x- component of V (r2) + blade velocity

3.Blade velocity â€“ x- component of V (r2)

4. Zero

Posted Date:-2022-07-27 10:16:39

## Question: ```In Pelton wheel, relative inlet velocity of jet with respect to velocity of vane is _____________ ```

1.Difference between inlet jet velocity and blade velocity

2.Sum of inlet jet velocity and blade velocity

3. Inlet jet velocity

Posted Date:-2022-07-27 10:17:13

## Question: ```In Pelton ____________ is ratio of volume of water actually striking the runner and volume of water supplied to turbine. ```

1.Mechanical efficiency

2.Volumetric efficiency

3.Hydraulic efficiency

4.Overall efficiency

Posted Date:-2022-07-27 10:48:25

## Question: ```In which of following turbine inlet and outlet blade velocities of vanes are equal? ```

1.Francis turbine

2.Kaplan turbine

3.Pelton turbine

4.Propeller turbine

Posted Date:-2022-07-27 10:12:03

## Question: ```In which of following turbine inlet whirl velocity and inlet jet velocity are equal in magnitude? ```

1.Pelton turbine

2.Propeller turbine

3.Kaplan turbine

4.Francis turbine

Posted Date:-2022-07-27 10:14:32

## Question: ```Kinetic energy of jet at inlet of turbine is given as __________________ ```

1.0.5(paV1)*V1

2.0.5(paV1)*V1*V1

3.0.5(aV1)*V1*V1

4. 0.5(pV1)*V1*V1

Posted Date:-2022-07-27 10:40:02

## Question: ```Number of buckets on runner of Pelton wheel is given by expression? (D-diameter of runner and d- diameter of jet) ```

1.15 + D/2d

2.15 + 3D/2d

3.15 + D/d

4.15 + 2D/d

Posted Date:-2022-07-27 10:25:20

## Question: ```Tangential velocity of blade of Pelton wheel is proportional to ____________ ```

1.Speed of wheel

2.Angular velocity of wheel

3.Rpm of wheel

4.Speed, angular velocity, RPM of the wheel

Posted Date:-2022-07-27 10:13:28

## Question: ```The depth of buckets of Pelton wheel ____________ ```

1.1.2 times diameter of jet

2.1.3 times diameter of jet

3.1.4 times diameter of jet

4.1.5 times diameter of jet

Posted Date:-2022-07-27 10:21:32

## Question: ```The difference between gross head and friction losses is ____________ ```

Posted Date:-2022-07-27 10:09:55

## Question: ```The expression for maximum hydraulic efficiency of Pelto turbine is given by ______________ ```

1.(1+cos k)/2 where k is outlet blade angle

2.(2+cos k)/2 where k is outlet blade angle

3.(3+cos k)/2 where k is outlet blade angle

4.(4+cos k)/2 where k is outlet blade angle

Posted Date:-2022-07-27 10:50:48

## Question: ```The expression for water power in Pelton wheel is ________________ ```

1.(P*g*Q*H) Kw

2.(g*Q*H*a) Kw

3.(g*Q) Kw

4.(g*H) Kw

Posted Date:-2022-07-27 10:43:45

## Question: ```The force exerted by a jet of water in the direction of jet of jet on a stationary curved plates Fx is ____________ ```

1.pav*v

2.pav

3.pav*v(1+cos k)

4.pav*v(1+sin k)

Posted Date:-2022-07-27 10:40:50

## Question: ```The force exerted by a jet of water in the direction of jet of jet on moving curved plates is ___________ ```

1.pa(v-u)*(v-u)

2.pa(v-u)

3.pav*(v-u)(1+cos k)

4.pa(v-u)*(v-u)(1+sin k)

Posted Date:-2022-07-27 10:42:09

## Question: ```The head available at inlet of turbine is ____________ ```

Posted Date:-2022-07-27 10:08:23

## Question: ```The hydraulic efficiency of Pelton turbine will be maximum when blade velocity is equal to _______ ```

1.V/2

2.V/3

3.V/4

4.V/5

Posted Date:-2022-07-27 10:45:30

## Question: ```The maximum efficiency of Pelton turbine is _________ ```

1.80%

2.70%

3.50%

4.88%

Posted Date:-2022-07-27 10:46:41

## Question: ```The number of buckets of Pelton wheel is 25 and diameter of runner is 1.5meters then calculate diameter of jet is ___________ ```

1.80mm

2.85mm

3.90mm

4. 82mm

Posted Date:-2022-07-27 10:24:16

## Question: ```The power supplied at inlet of turbine in S.I units is known as_____________ ```

1.Shaft power

2.Runner power

3.Water power

4.Total power

Posted Date:-2022-07-27 10:43:16

## Question: ```The ratio of diameter of jet to diameter of runner is _____________ ```

1.1:3

2. 1:6

3.1:5

4.3:4

Posted Date:-2022-07-27 10:28:06

## Question: ```The ratio of pitch diameter of Pelton wheel to diameter of jet is known as ___________ ```

1.Speed ratio

2.Jet ratio

3.Velocity ratio

4.Co-efficient of velocity

Posted Date:-2022-07-27 10:22:10

## Question: ```The turbine is preferred for 0 to 25 m head of water? ```

1.Pelton wheel

2.Kaplan turbine

3.Tube turbine

4.Francis turbine

Posted Date:-2022-07-27 10:06:26

## Question: ```The value of coefficient of velocity is _____________ ```

1.0.98

2.0.65

3.0.85

4.0.33

Posted Date:-2022-07-27 10:13:58

## Question: ```The width of buckets of Pelton wheel is _________________ ```

1.2 times diameter of jet

2.3 times diameter of jet

3.4 times diameter of jet

4.5 times diameter of jet

Posted Date:-2022-07-27 10:20:57

## Question: ```The work done per unit weight of water jet striking runner blades of Pelton turbine is given by expression ______________ ```

1.[Vw1+Vw2] u/g

2.Vw1*u/g

3.[Vw1+Vw2]/g

4.[Vw1+Vw2]u

Posted Date:-2022-07-27 10:29:00

## Question: ```Total head of turbines is_______ ```

Posted Date:-2022-07-27 09:36:51

## Question: ```Under what head is Pelton turbine operated? ```

1.20-50 meters

2.15-2000 meters

3.60-200 meters

4.50-500 meters

Posted Date:-2022-07-27 10:07:20

## Question: ```Velocity triangles are used to analyze ____________ ```

1.Flow of water along blades of turbine

2.Measure discharge of flow

3.Angle of deflection of jet

4.Flow of water, measure of discharge, angle of deflection

Posted Date:-2022-07-27 10:11:09

## Question: ```____________ is obtained by dividing total rate of flow through the turbine by rate of flow through single jet. ```

1.Number of jets

2.Diameter of jets

3.Velocity of jets

4.Speed ratio

Posted Date:-2022-07-27 10:25:53