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Test: Degree of Reaction - Civil Engineering (CE) MCQ


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10 Questions MCQ Test - Test: Degree of Reaction

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

The formation of vapour cavities is called _____

Detailed Solution for Test: Degree of Reaction - Question 1

The formation of vapour cavities is called cavitation. It is formed due to the presence of small free liquids with different zones. These zones consists of different layers of forces acting on them.

Test: Degree of Reaction - Question 2

Voids are created due to______

Detailed Solution for Test: Degree of Reaction - Question 2

Voids in a turbine or pump is created due to the presence of liquid free layers. It is formed due to the presence of small free liquids with different zones. These zones consists of different layers of forces acting on them.

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Test: Degree of Reaction - Question 3

Degree of reactions are most commonly used in________

Detailed Solution for Test: Degree of Reaction - Question 3

Degree of reaction is most commonly used in turbomachinery. Degree of reaction is defined as the ratio of the static pressure drop in the rotor to the static pressure drop in the stage. It can also be defined in the same way for enthalpy in different stages. It is denoted by the letter ‘R’.

Test: Degree of Reaction - Question 4

Voids that implode near metal surface develops a_______

Detailed Solution for Test: Degree of Reaction - Question 4

Voids that implode near metal surface develops a cyclic stress. This happens mainly due to repeated implosion of voids. Thus, option ‘b’ is correct.

Test: Degree of Reaction - Question 5

The velocities of the blade angles can be found out using________

Detailed Solution for Test: Degree of Reaction - Question 5

The velocity triangle represents various components. It mainly determines the velocities of fluids that act in a turbomachinery. It can be drawn for both inlet and outlet triangles with its angles.

Test: Degree of Reaction - Question 6

Hydrodynamic cavitation is due to the process of _________

Detailed Solution for Test: Degree of Reaction - Question 6

Hydrodynamic cavitation is due to the process of vaporisation. A bubble generation takes place in which implosion occurs during the flowing of liquid.

Test: Degree of Reaction - Question 7

Which of these options are best suited for the total energy change inside the runner per unit weight?

Detailed Solution for Test: Degree of Reaction - Question 7

Degree of reaction is defined to be the ratio of pressure and total energies inside the runner of a turbine.

Test: Degree of Reaction - Question 8

When a container containing a liquid is rotated, then due to centrifugal action, then which of these energies are changed?

Detailed Solution for Test: Degree of Reaction - Question 8

When a container containing a liquid is rotated, then due to centrifugal action there is a change in pressure energy.

Test: Degree of Reaction - Question 9

 _________ means the angle made by absolute velocity with the tangent on the wheel is 90 degrees and the component of whirl velocity is zero.

Detailed Solution for Test: Degree of Reaction - Question 9

Radial discharge is the angle made by absolute velocity with the tangent on the wheel is 90 degrees and the component of whirl velocity is zero. Radial discharge at outlet means the angle beta is 90.

Test: Degree of Reaction - Question 10

Which among the following velocities cannot be found using the velocity triangle?

Detailed Solution for Test: Degree of Reaction - Question 10

The velocity triangle represents various components. It mainly determines the velocities of fluids that act in a turbomachinery. It can be drawn for both inlet and outlet triangles with its angles.

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