A hydrometer
A.is used to measure the absolute pressure
B.uses the principle of buoyant force to determine specific gravities of liquids
C.is used to determine viscosities of liquids
D.is used to measure the local atmospheric pressure
Category: Fluid Mechanics and Solid Handling Mcqs
Newtons law of viscosity states that for a given rate of angular deformation of fluid.
A.the shear stress is directly proportional to the viscosity
B.the shear stress is inversely proportional to the viscosity
C.the shear stress is independent of the viscosity
D.the shear stress is directly proportional to the square of viscosity
Gage pressure is given by
A.absolute pressure ?local atmospheric pressure
B.absolute pressure + local atmospheric pressure
C.standard atmospheric pressure?vacuum pressure
D.standard atmospheric pressure + vacuum pressure
The vertical distance between the total energy grade line and hydraulic grade line represents
A.the pressure head
B.the velocity head
C.the elevation head
D.the piezometric head
The hydraulic grade line in pipe flow indicates the variation of
A.pressure head in the direction of flow
B.velocity head in the direction of flow
C.piezometric head in the direction of flow
D.elevation head in the direction of flow
Spherical shape of droplets of mercury is due to its
A.high adhesion
B.low vapour pressure
C.high surface tension
D.high density
The SI unit of dynamic viscosity is
A.N.s/m2
B.N/m.s
C.m2/s
D.kg.s/m2
In order to avoid a correction for the effect of capillary in manometers used for measuring pressure the diameter of the tube should he
A.less than or equal to 3 mm
B.more than 3 mm but less than 5 mm
C.equal to 5 mm
D.greater than or equal to 0.5 inch.
The buoyant force on a floating/submerged body is
A.a force due to gravity and acts downward
B.equal to the weight of liquid displaced by the body and acts vertically upward
C.the resultant force on a body due to the fluid surrounding it
D.the force necessary to maintain equilibrium of a submerged body
