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Test: Steam Turbines -2 - Mechanical Engineering MCQ


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10 Questions MCQ Test - Test: Steam Turbines -2

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

Which statement is not true for a steam turbine when compared to steam engines?

Test: Steam Turbines -2 - Question 2

In an impulse turbine, the blade friction reduces the relative velocity of steam on passing over the blades by about

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Test: Steam Turbines -2 - Question 3

Blading efficiency is defined as the ratio of

Test: Steam Turbines -2 - Question 4

The optimum value of nozzle angle lies within the range

Detailed Solution for Test: Steam Turbines -2 - Question 4

The lower is the nozzle angle, higher is the blading efficiency. However, too low a nozzle angle may cause energy loss at blade inlet. Therefore, the nozzle angle low has to be maintained within a certain range, which varies from 16° to 22°

Test: Steam Turbines -2 - Question 5

If nozzle angle is 30°, the De Laval turbine will have a maximum efficiency of

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Test: Steam Turbines -2 - Question 6

Steam enters a De LavaI steam turbine with an outlet velocity of 25 m/s and leaves with an outlet velocity of 5 m/s. The work done by 1 kg of steam is

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Test: Steam Turbines -2 - Question 7

A single stage impulse turbine with a diameter of 100 cm runs at 3000 rpm. if the blade speed ratio is 0.45, the inlet velocity will be

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Test: Steam Turbines -2 - Question 8

For a single stage impulse turbine with nozzle angle 15°, rotor diameter 2 m and speed 3000 rpm, the optimum velocity of steam in m/s is:
[Take cos15° = 0.966, sin15° = 0.258]

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Test: Steam Turbines -2 - Question 9

For an impulse turbine, the nozzle efficiency is 90%, the blade velocity ratio is 0.5 and the mean blade velocity is 150 m/s. This corresponds to heat drop in the nozzle equal to

Detailed Solution for Test: Steam Turbines -2 - Question 9


∴ 

∴ 

Test: Steam Turbines -2 - Question 10

De Laval turbine is

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