Mechanical Physics MCQ

Test your knowledge with important Mechanical Physics MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Mechanical Physics MCQs at Bissoy

• Assertion (A) Machine parts or jammed in winter.<br>Reason (R) The viscosity of lubricant used in machine parts increase at low temperature.
  ক

  Both A and R are true and R is the correct explanation of A

  খ

  Both A and R are true, but R is not the correct explanation of A

  গ

  A is true, but R is false

  ঘ

  A is false, but R is true
• The property of matter by virtue of which a body tends to regain its original shape and size after the removal of deforming force is called
  ক

  plasticity

  খ

  elasticity

  গ

  stress

  ঘ

  capillarity
• The building and movement of ships is based on . . . . . . . .
  ক

  Downward direction

  খ

  Opposite direction

  গ

  Same direction

  ঘ

  Upward direction
• The density of water is 1 g./cc. This is strictly valid at
  ক

  0°C

  খ

  4°C

  গ

  25°C

  ঘ

  100°C
• The working of an atomiser depend upon
  ক

  Bernoulli's Theorem

  খ

  Boyle's Law

  গ

  Archimedes Principle

  ঘ

  None of the above
• Water rises in plant fibres due to
  ক

  capillarity

  খ

  viscosity

  গ

  fluid pressure

  ঘ

  osmosis
• Consider the following statements.<br>1. The liquid pressure is inversely proportional to the density of liquid.<br>2. The pressure exerted on the liquid doesn't depend upon the shape or size of the container.<br>Which of the statement(s) given above is/are correct?
  ক

  Only 1

  খ

  Only 2

  গ

  Both 1 and 2

  ঘ

  Neither 1 nor 2
• It is difficult to cut things with a blunt knife because
  ক

  the pressure exerted by knife for given force increases with increase in bluntness

  খ

  a sharp edge decreases the pressure exerted by knife for a given force

  গ

  a blunt knife decreases the pressure for a given force

  ঘ

  a blunt knife decreases the area of intersection
• It which temperature is the density of water maximum?
  ক

  0° Celsius

  খ

  100° Celsius

  গ

  50° Celsius

  ঘ

  4° Celsius
• Static science is associated with
  ক

  Dynamic situation

  খ

  Situation of rest

  গ

  Mental situation

  ঘ

  Data analyzing
• In automobile hydraulic brakes work on
  ক

  Archimedes Principle

  খ

  Newton's law of motion

  গ

  Bernoulli's Principle

  ঘ

  Pascal's Law
• Assertion (A): When a ship enters a sea from a river, it rises a little.<br>Reason (R): The density of sea water is greater than that of river water.<br>In the context of the above statements, which of the following is true?
  ক

  Both (A) and (R) are true and (R) is the correct explanation of (A)

  খ

  Both (A) and (R) are true, but (R) is not the correct explanation of (A)

  গ

  (A) is true, but (R) is false

  ঘ

  (A) is false, but (R) is true
• Viscosity is the property of liquids by virtue of which they
  ক

  attract other molecules

  খ

  become conducting

  গ

  oppose the relative motion of its parts

  ঘ

  push neighbouring molecules
• The force of attraction applied between molecules of the same substance is called:
  ক

  cohesive force

  খ

  adhesive force

  গ

  capillarity

  ঘ

  surface tension
• A body is floating in a liquid partly immersed. The body and the liquid are taken to moon. The body
  ক

  will continue to float as before

  খ

  floats with greater part immersed

  গ

  floats with lesser part immersed

  ঘ

  will sink
• Pressure inside a soap bubble is
  ক

  More than atmospheric pressure

  খ

  Less than atmospheric pressure

  গ

  Equal to atmospheric pressure

  ঘ

  Half of atmospheric pressure
• Which one of the following is not a result of surface tension?
  ক

  Nearly spherical drop of rain

  খ

  Capillary rise

  গ

  Removal of dirt by soap or detergent

  ঘ

  Flow of a liquid
• What is an ideal fluid?
  ক

  Very viscous

  খ

  One which obeys Newton's law of viscosity

  গ

  Compressible flow

  ঘ

  Frictionless and incompressible
• The pressure of a fluid varies with depth h as p = p₀ + pgh, where p is the fluid density. This expression is associated with
  ক

  Pascal's Law

  খ

  Newton's Law

  গ

  Bernoulli's Principle

  ঘ

  Archimedes' Principle
• Assertion (A) The concept of surface tension is held only for liquid.<br>Reason (R) Surface tension does not hold for gases.
  ক

  Both A and R are true and R is the correct explanation of A

  খ

  Both A and R are true, but R is not the correct explanation of A

  গ

  A is true, but R is false

  ঘ

  A is false, but R is true
• Any body kept in a fluid experiences an upward force called . . . . . . . .
  ক

  torque

  খ

  moment

  গ

  pressure

  ঘ

  upthrust
• The breaking stress of wire depends on
  ক

  material of the wire

  খ

  length of the wire

  গ

  radius of the wire

  ঘ

  shape of the cross-section of the wire
• The SI unit of elastic potential energy is
  ক

  watt

  খ

  joule

  গ

  joule's

  ঘ

  joule s^-1
• When pressure is applied to a fluid, the pressure change is transmitted to every part of the fluid without any loss. Which of the following laws explains this phenomenon?
  ক

  Hooke's Law

  খ

  Bernoulli's Law

  গ

  Avogadro's Law

  ঘ

  Pascal's Law
• Assertion (A) Pascal law is the working principle of a hydraulic lift.<br>Reason (R) Pressure is equal to thrust per unit area.
  ক

  Both A and R are true and R is the correct explanation of A

  খ

  Both A and R are true, but R is not the correct explanation of A

  গ

  A is true, but R is false

  ঘ

  A is false, but R is true
• While travelling by plane, the ink of the pen starts to come out
  ক

  Due to decrease in air pressure

  খ

  Due to increase in air pressure

  গ

  Due to increase in volume of ink

  ঘ

  Due to excessive load
• Consider the following statements.<br>The rise of a liquid in a capillary tube depends on<br>1. The surface tension of liquid<br>2. The length<br>3. The outer radius<br>4. The inner radius of the tube<br>Which of the following statements is/are true?
  ক

  1, 2 and 4

  খ

  1 and 2

  গ

  1 and 4

  ঘ

  2 and 4
• Which of the following statements is not true regarding the effect of increasing temperature on the distribution of molecular motion in a gas-
  ক

  Most likely speed increases

  খ

  The fraction of molecules increases with the maximum possible speed

  গ

  Delivery becomes widespread

  ঘ

  The area under the distribution curve remains the same as below the lower temperature value
• What is another name for the buoyancy force exerted by water to a submerged body?
  ক

  Mechanical force

  খ

  Buoyancy force

  গ

  Frictional force

  ঘ

  Pressure
• Which of the following is not based on the principle of Archimedes?
  ক

  Hydrometer

  খ

  Submarine

  গ

  Lactometer

  ঘ

  Odometer