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Test: Hydroelectric Power Plant - 2 - Mechanical Engineering MCQ


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10 Questions MCQ Test Topicwise Question Bank for Mechanical Engineering - Test: Hydroelectric Power Plant - 2

Test: Hydroelectric Power Plant - 2 for Mechanical Engineering 2024 is part of Topicwise Question Bank for Mechanical Engineering preparation. The Test: Hydroelectric Power Plant - 2 questions and answers have been prepared according to the Mechanical Engineering exam syllabus.The Test: Hydroelectric Power Plant - 2 MCQs are made for Mechanical Engineering 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Hydroelectric Power Plant - 2 below.
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Test: Hydroelectric Power Plant - 2 - Question 1

Which of the following laws of performance is not correctly matched?

Where N is speed and D is diameter.

Test: Hydroelectric Power Plant - 2 - Question 2

Which of the following turbine is used for tidal power plant?

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Test: Hydroelectric Power Plant - 2 - Question 3

The available discharge and head of a proposed hydroelectric power plant are 350 m3/s and 30 m respectively. The turbine efficiency is 80% and speed is 280 rpm. What is the least number of machines required if you have to use Francsis turbine having a specific speed of 300?
[Take g = 10 m/s2 and 305/4 = 70]

Detailed Solution for Test: Hydroelectric Power Plant - 2 - Question 3

P = g Q Hη
= 10 x 350 x 30 x 0.8 = 84000 kW
Specific speed,

∴ 
∴ P = 752 = 5625 kW
∴ Number of turbine  

Test: Hydroelectric Power Plant - 2 - Question 4

A turbine works under a head of 20 m and has maximum flow rate of 3 m3/s and a speed of 600 rpm. If it has to work in another plant under a head of 5 m, at what speed must the turbine run in order to attain approximately the same efficiency

Detailed Solution for Test: Hydroelectric Power Plant - 2 - Question 4

Test: Hydroelectric Power Plant - 2 - Question 5

The speed factor (speed ratio) of a Pelton turbine for its efficient operation lies in the range

Test: Hydroelectric Power Plant - 2 - Question 6

Regulation of a pelton turbine is done by changing

Detailed Solution for Test: Hydroelectric Power Plant - 2 - Question 6

A spear or needle is so arranged that it can move forward or backward thereby decreasing or increasing the annular area of the nozzle passage. This spear nozzle regulates the water flow through the nozzle.

Test: Hydroelectric Power Plant - 2 - Question 7

The movable wicket gates of a reaction turbine are used to

Detailed Solution for Test: Hydroelectric Power Plant - 2 - Question 7

Guide vanes or wicket gates are arranged inside the casing to form a number of flow passages between the casing and runner blades. They direct the water onto the runner at an angle appropriate to the design.

Test: Hydroelectric Power Plant - 2 - Question 8

Which one of the following forms of draft tube will not improve the hydraulic efficiency of the turbine?

Detailed Solution for Test: Hydroelectric Power Plant - 2 - Question 8

Purpose of draft tube is to convert kinetic energy into pressure energy, so option (a) wiil not be suitable for the intended purpose of draft tube.

Test: Hydroelectric Power Plant - 2 - Question 9

The value of speed ratio for a Kaplan turbine is about

Test: Hydroelectric Power Plant - 2 - Question 10

The specific speed of a fluid machine

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