Test: Waves


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10 Questions MCQ Test | Test: Waves

Test: Waves for Mechanical Engineering 2023 is part of Mechanical Engineering preparation. The Test: Waves questions and answers have been prepared according to the Mechanical Engineering exam syllabus.The Test: Waves MCQs are made for Mechanical Engineering 2023 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Waves below.
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Test: Waves - Question 1

 When a pebble is dropped into a pond of still water, what happens?

Detailed Solution for Test: Waves - Question 1

 When a pebble is thrown in still water, a circular pattern of alternate crests spread out. The kinetic energy makes the particles to oscillate which comes in contact with it. The energy gets transferred to the particles of next layer which also begins to oscillate. Thus it is the disturbance or waves that move forward and not the particles of the medium.

Test: Waves - Question 2

Mechanical waves are called elastic waves. True or false?

Detailed Solution for Test: Waves - Question 2

Waves which require a medium for their propagation are called mechanical waves. They are also called elastic waves because they depend on the elastic properties of medium.

Test: Waves - Question 3

What are the essential properties a medium must possess for the propagation of mechanical waves?

Detailed Solution for Test: Waves - Question 3

The friction force amongst the particles of the medium should be negligibly small so that they continue oscillating for a sufficiently long time and the wave travels a sufficiently long distance through the medium

Test: Waves - Question 4

Transverse waves can be formed in fluids. True or false?

Detailed Solution for Test: Waves - Question 4

Transverse waves travel in the form of crests and troughs. They involve changes in shape of the medium. So they can be transmitted through media which have rigidity. As fluids do not sustain shearing stress, transverse waves cannot be formed in them.

Test: Waves - Question 5

Which of the following waves can be transmitted through solids, liquids and gases?

Detailed Solution for Test: Waves - Question 5

Longitudinal waves involve changes in volume and density of the medium. Since all media can sustain compressive stress, longitudinal waves can be transmitted through all the three types of media.

Test: Waves - Question 6

 For an aluminium the modulus of rigidity is 2.1×1010 N/m2 and density is 2.7×103 kg/m3. Find the speed of transverse waves in the medium.

Detailed Solution for Test: Waves - Question 6

Speed = √(Ƞ/ƿ)
Speed = 2.79×103 m/s

Test: Waves - Question 7

Sound travels through a gas under which of the following condition?

Detailed Solution for Test: Waves - Question 7

The compressions and rarefactions are formed so rapidly that the heat generated in the regions of compressions does not get time to pass into the regions of rarefactions so as to equalise the temperature. So when sound travels through gas, the temperature remains constant. Therefore, it is adiabatic.

Test: Waves - Question 8

 What kind of wave is formed in organ pipes?

Detailed Solution for Test: Waves - Question 8

 When two identical longitudinal waves travelling in opposite directions overlap, a longitudinal stationary wave is formed. Thus, the waves produced in organ pipes are longitudinal stationary waves.

Test: Waves - Question 9

What is the most fundamental property of wave?

Detailed Solution for Test: Waves - Question 9

When a wave travels from one medium to other, its wavelength as well as velocity may change. This is the reason that frequency is the fundamental property of wave.

Test: Waves - Question 10

 In which medium sound travels faster?

Detailed Solution for Test: Waves - Question 10

Sound travels in solid with highest speed because the coefficient of elasticity of solids is much greater than the coefficient of elasticity of liquids and gases.

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