MCQ 6 What is the difference between gage pressu pressure? re and absolute a. Th
ID: 2073290 • Letter: M
Question
MCQ 6 What is the difference between gage pressu pressure? re and absolute a. The gage pressure is that relative to the atmospheric e pressure is that relative to the re while the absolut absolute vacuum. b. The gage pressure is that relative to the absolute vacuum hat relative to atmospheric while the absolute pressure is t pressure. c. The gage and the absol lute pressure are both related to the atmospheric pressure. MCQ7 Stream lines represent Lines drawn to visualize the flow field and show the flow b.Lines drawn through the flow field and are tangent to the e The path of a fluid particle as it moves through the flow direction. velocity vector at every point. field. MCQ9 Viscosity may be defined as a measure of fluid's capacity to resist to a. Deformation under shear stress. b. Deformation under normal stress. e. Thermal l energy under certain condition. MCQ10 The momentum equation is used to analyze The mass flow produced by flowing fluids. b. The pressure produced by flowing fluids. e The trusts and drags produced by flowing fluids. d The velocity distribution in flowing fluids. MCQ 11 Th e buoyant force may be defined as The downward force acting on a body totally submerged in a fluid b The pressure due to gravity e The upward force that is acting on a body totally or partially submerged in a fluid. MCQ 12 The hydrostatic differential equation:Explanation / Answer
MCQ6- Option- a.
MCQ7 - option - b
A streamline is an imaginary curve drawn through a flowing fluid in such a way that tangent to it at any point gives the direction of the velocity of flow at that point.
MCQ9- option-a
viscosity is the property of a fluid which is defined as the resistance to flow. In other words, it offers resistance to shear under the application of external loads. Highly viscous fluids are resisted for flowing. For gases, viscosity increases with increases in temperature, whereas liquid viscosity decreases with increases in temperature.
MCQ10-option-c
Newton second law can be written as " The rate of change of momentum of a body is equal to the resultant force acting on the body, and takes place in the direction of force".
Momentum is the object mass times the velocity between two times t1 and t2, the force is given by
F= m2V2-m1V1 /( t2 - t1)
this force is nothing but thrust.
The thrust is then equal to the exit mass flow rate times the exit velocity minus the free stream mass flow rate times the free stream velocity.
MCQ11-option-C
According to Archimedes principle when a body is submerged in a liquid partially or fully, it is buoyed up or lifted up by the force which is equal to the weight of the fluid displaced by the body. It always acts in opposite direction to the gravitational force.
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