Looks Fam Flashcards
- Liquids:
B do not occupy definite shape.
- Specific weight of liquid:
Does not vary on any other planet
- The specific weight of water is 1000 kg/m³
D all the above.
- Specific weight of sea water is more than that of pure water because of:
all of the above
- Water belongs to:
A Newtonian fluids.
- Fluids change the volume under external pressure due to:
C compressibility.
- Molecules of fluids get attracted due to:
D adhesion.
- Falling drops of water become spheres due to:
C surface tension.
- In an open tube
free surface of mercury remains:
- If cohesion between the molecules of a fluid is more than adhesion between the fluid and glass
the free level of fluid in a dipped glass tube will be:
- A rise or fall of liquid in a glass tube of a very small diameter when dipped is:
Directly proportional to the diameter of the glass tube.
- Hydrostatic pressure on a dam depends upon its:
D both (b) and (c).
- Barometers are used to measure:
C atmospheric pressure.
- Piezometers are used to measure:
very low pressure
- Manometers are used to measure:
Pressure in water channels
- Differential manometers are used to measure:
B difference in pressure at two points.
- The pressure less than atmospheric pressure
is known:
- Atmospheric pressure varies with:
none of these
- Mercury is generally used in barometers because:
D both (a) and (b) above.
- The total pressure force on a plane area is equal to the area multiplied by the intensity of pressure at its centroid
if:
- The center of pressure of a vertical plane immersed in a liquid is at:
none of these
- On an inclined plane
center of pressure is located:
- When a body is totally or partially immersed in a fluid
it is buoyed up by a force equal to:
- A floating body attains stable equilibrium if its metacenter is:
B above the centroid.
- Center of buoyancy is:
B centroid of the fluid displaced.
- The rise of the liquid along the walls of a revolving cylinder above the initial level
is:
- When a liquid rotates at constant angular velocity about a vertical axis of a rigid body
the pressure:
- The imaginary line drawn such that the tangents at its all points indicate the direction of the velocity of the fluid particles at each point
is called:
- In fluids
steady flow occurs when:
- Uniform flow is said to occur when:
A size and shape of the crosssection in a particular length remain constant.
- If velocities of fluid particles vary from point to point in magnitude and direction
as well as from instant to instant
- A steady uniform flow is through:
D a long pipe at constant rate.
- A nonuniform steady flow is through:
A an expanding tube at constant rate.
- The continuity equation:
B relates mass rate of flow along a streamline.
- Equation of continuity of fluids is applicable only if:
D all the above.
- The flow in which each liquid particle has a definite path
and the paths of adjacent particles do not cross each other
- Total head of a liquid particle in motion is the sum of:
D potential head
- The main assumption of Bernoulli’s equation is:
D All the above.
- Reynold number is the ratio of initial force and:
D viscosity.
- The velocity of the fluid particle at the center of the pipe section
is:
- An independent mass of a fluid does not possess:
Pressure Energy
- Frictional loss of head includes the loss of energy due to:
none of these
- Energy equation is usually applicable to:
A steady flow.
- The line joining the points to which the liquid rises in vertical piezometer tubes fitted at different crosssections of a conduit
is known as:
- Hydraulic grade line:
A may be above or below the center line of conduit.
- A pitot tube is used to measure:
A velocity of flow.
- The ratio of the inertia and viscous forces acting in any flow
ignoring other forces
- The ratio of the inertia and gravitational force acting in any flow
ignoring other forces
- Mach number is the ratio of inertia force to:
Elasticity
- Weber number is the ratio of inertia force to:
C surface tension.
- A piezometer opening in pipes measures:
B static pressure.