Testbook Logo
Exams SuperCoaching Test Series Skill Academy
More

Question

Download Solution PDF

The overall efficiency of Francis Turbine is given by

(where, W is the weight of water per second which strikes the runner, P is the power available at the runner shaft and H is the net head at the runner shaft)

This question was previously asked in
BPSC AE Paper IV General Engineering 19 Dec 2024 Official Paper
Attempt Online
View all BPSC AE Papers >
  1. \( \lambda_0=\frac{(2 \mathrm{WH})}{\mathrm{P}} \)
  2. \(\lambda_0=\frac{2 \mathrm{P}}{(\mathrm{WH})} \)
  3. \(\lambda_0=\frac{(\mathrm{WH})}{\mathrm{P}} \)
  4. \( \lambda_0=\frac{\mathrm{P}}{(\mathrm{WH})}\)

Answer (Detailed Solution Below)

Option 4 : \( \lambda_0=\frac{\mathrm{P}}{(\mathrm{WH})}\)
Free Tests
View all Free tests >
Free
BPSC AE सामान्य हिंदी Mock Test
2.6 K Users
20 Questions 40 Marks 24 Mins
Start Now

Detailed Solution

Download Solution PDF

Concept:

The overall efficiency of a Francis turbine is defined as the ratio of useful power output at the runner shaft to the hydraulic power input from water striking the runner.

Formula:

Hydraulic Power Input = Weight of water per second × Net Head

\( \lambda_0 = \frac{\text{Power Output}}{\text{Hydraulic Power}} = \frac{P}{W \cdot H} \)

 

Download Solution PDF
Latest BPSC AE Updates

Last updated on Jul 17, 2025

-> BPSC AE exam analysis 2025 is available now. 

-> BPSC AE admit card 2025 has been released at the official website.

-> BPSC AE 2025 exam date has been revised. The exam will be conducted on July 17, 18 & 19 now. 

-> Candidates who were facing technical issues while filling form can now fill the BPSC AE application form 2025 without any issue. 

->BPSC AE age limit 2025 has been revised. Also Check the BPSC AE Syllabus and Exam Pattern

->BPSC AE application form 2025  was released on April 30. The last date to fill BPSC AE form 2025 was May 28. 

->BPSC AE interview call letters released for Advt. 32/2024.

->BPSC AE notification 2025 has been released. 

->A total of 1024 vacancies are announced through BPSC AE recruitment 2025

->The BPSC Exam Calendar 2025 has been released for the Assistant Engineer Recruitment.

-> The selection will be based on a written exam and evaluation of work experience.

-> Candidates with a graduation in the concerned engineering stream are eligible for this post.

-> To prepare for the exam solve BPSC AE Previous Year Papers. Also, attempt the BPSC AE Civil  Mock Tests.

‹‹ Previous Ques
Next Ques ››

More Reaction Turbine Questions

Q1.The overall efficiency of Francis Turbine is given by (where, W is the weight of water per second which strikes the runner, P is the power available at the runner shaft and H is the net head at the runner shaft)
Q2.For Parson's reaction turbine, which of the following condition is correct? [Where α = Nozzle angle, ϕ = Exit angle of moving blade, θ = Entrance angle of moving blade, β = angle which the discharging steam makes with the tangent of the wheel at the exit of the moving blade]
Q3.An inward flow reaction turbine has the following data: Head available = 25 m Velocity of flow = 2.5 m/s (constant) Guide blade angle = 10° Runner vanes are radial at the inlet and discharge at the outlet is radial. What will be the approximate hydraulic efficiency of the turbine? [ given, tan10∘=0.176, g = 10 m/s²]
Q4.The degree of reaction is given by:
Q5.Which of the following is the best suitable range of working head of Kaplan turbine? 
Q6.Which of the following statements best describes the impact of a draft tube's design on the efficiency of a reaction turbine?
Q7.A river carrying a discharge of 100 cumecs has a fall of 200 m. The power available from the fall using an overall efficiency of 85% is
Q8.In which of the following turbines, the ends of the blades are welded to disks to form a cage like a hamster cage and instead of the bars, the turbine has the trough - shaped steel blades?
Q9.Which of the following expressions gives the area of flow for a Kaplan turbine ? Where, D = diameter, B = width of vane, D0 = outer diameter of runner, Db = diameter of hub

More Turbomachinery Questions

Q1.Which factor does NOT directly affect the power required to drive a centrifugal pump?
Q2.A centrifugal pump has a hydraulic power output of 10 kW and consumes 15 kW of mechanical power. Calculate its overall efficiency.
Q3.Compared to a single volute casing, a double volute casing with a vaned diffuser generally provides:
Q4.In a radial flow pump, the fluid primarily flows:
Q5.The manometric efficiency in a pump is the ratio of:
Q6.The design of a semi-open impeller makes it suitable for:
Q7.What is the basic function of a single volute casing in a centrifugal pump? 
Q8.Mean diameter or the pitch diameter (D) of the Pelton Wheel which rotates at N r.p.m. is given by (where, Ku is the speed of rotation and H is the net head)
Q9. Theoretical power required to drive a Single-acting Reciprocating Pump is (where, ω is the specific weight of the liquid, A is the cross-sectional area of piston or the plunger, L is the length of the stroke, N is delivery stroke per minute, Hs is the static head, Hd is the delivery head)
Q10.The overall efficiency of Francis Turbine is given by (where, W is the weight of water per second which strikes the runner, P is the power available at the runner shaft and H is the net head at the runner shaft)
Suggested Test Series
View All >
71st BPSC CCE (Preliminary) Test Series 2025
215 Total Tests with 1 Free Tests
Start Free Test
BPSC बिहार माध्यमिक TGT (9 to 10) शिक्षक भर्ती 4.0 Mock Test
577 Total Tests with   2 Free Tests
Start Free Test

More Fluid Mechanics Questions

Q1.A hydraulic model of a spillway is constructed with a scale \(1:16.\) If the prototype discharge is 2048 cumec, then the corresponding discharge for which the model should be tested is
Q2.Match List I with List II and select the correct answer using the combination given below the lists: hysical Quantity Dimensional Formula a. Specific gravity 1. \([\text{M}^0 \text{L}^2 \text{T}^{-1}] \) b. Coefficient of viscosity 2. \([\text{M}^0 \text{L}^0 \text{T}^{-0}] \) c. Kinematic viscosity 3. \([\text{ML}^{-1} \text{T}^{-1}] \) d. Stress 4. \([\text{ML}^{-1} \text{T}^{-2}] \)  
Q3.An open cubical tank of 2 m side is filled with water. If the tank is rotated with an acceleration such that half of the water spills out, then the acceleration is equal to
Q4.The unit of dynamic viscosity of a fluid is
Q5.For steady incompressible flow through a closed conduit of uniform cross-section, the direction of the flow will always be
Q6.A rectangular channel has a width of 2.0 m and carries a discharge of \(4.8 \text{m}^3/\text{s}\) with a depth of 1.60 m . At a certain section, a small, smooth hump with a flat top and of height 0.10 m is proposed to be built. Calculate the critical depth of flow. Neglect the energy loss.
Q7.A triangular open channel has a vertex angle of 90 degrees and carries flow at a critical depth of 0.30 m . The discharge in the channel is
Q8.The term alternate depth is used in open channel flow to denote the depths 
Q9.Piezometric head is the sum of
Q10.During designing water supply line of a housing complex, two distribution pipes of different diameter 2 cm , and 6 cm respectively are connected with the main supply pipe line. The velocity of flow of water in the pipe of 2 cm diameter is
Important Exams
Super Coaching
Exams
Test Series
Previous Year Papers
Syllabus
Testbook Edu Solutions Pvt. Ltd.
1st & 2nd Floor, Zion Building,
Plot No. 273, Sector 10, Kharghar,
Navi Mumbai - 410210
[email protected]
Toll Free:1800 833 0800
Office Hours: 10 AM to 7 PM (all 7 days)
Company
About usCareers We are hiringTeach Online on TestbookPartnersMediaSitemap
Products
Test SeriesTestbook PassOnline CoursesOnline VideosPracticeBlogRefer & EarnBooks
Our Apps
Follow us on
Copyright © 2014-2022 Testbook Edu Solutions Pvt. Ltd.: All rights reserved
User PolicyTermsPrivacy
Get Free Access Now
Hot Links： teen patti real cash withdrawal teen patti fun teen patti gold old version yono teen patti