Question: Two coplanar couples having equal and opposite moments_________________?

• 1. balance each other
• 2. produce a couple and an unbalanced force
• 3. are equivalent
• 4. can not balance each other

Question: Which one of the following statements is not correct_________________?

• 1. the tangent of the angle of friction is equal to coefficient of friction
• 2. the angle of repose is equal to angle of friction
• 3. the tangent of the angle of repose is equal to coefficient of friction
• 4. the sine of the angle of repose is equal to coefficient to friction

Question: The total pressure on the surface of a vertical sluice gate 2 m x 1 m with its top 2 m surface being 0.5 m below the water level will be ________________?

• 1. 500 kg
• 2. 1000 kg
• 3. 1500 kg
• 4. 2000 kg

Question: Falling drops of water become spheres due to the property of ____________________?

• 1. adhesion
• 2. cohesion
• 3. surface tension
• 4. viscosity

Question: Free surface of a liquid tends to contract to the smallest possible area due to force of_______________?

• 1. surface tension
• 2. viscosity
• 3. friction
• 4. cohesion

Question: Specific weight of sea water is more that of pure water because it contains_________________?

• 1. dissolved air
• 2. dissolved salt
• 3. suspended matter
• 4. all of the above

Question: Alcohol is used in manometers because___________________?

• 1. it has low vapour pressure
• 2. it is clearly visible
• 3. it has low surface tension
• 4. it can provide longer column due to low density

Question: The ratio of absolute viscosity to mass density is known as_________________?

• 1. specific viscosity
• 2. viscosity index
• 3. kinematic viscosity
• 4. coefficient of viscosity

Question: The density of water is 1000 kg/m3 at__________________?

• 1. 0°C
• 2. 0°K
• 3. 4°C
• 4. 20°C

Question: The property of fluid by virtue of which it offers resistance to shear is called________________?

• 1. surface tension
• 2. adhesion
• 3. cohesion
• 4. viscosity