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This is an MCQ-based quiz on the topic of First Law Applied to Flow Processes.
This includes the following:-
Examples of Steady Flow Processes
Variable Flow Processes
Polytropic Process
For an insulated nozzle, SFEE of the control surface gives ( considering change in PE is zero and inlet velocity is small compared to exit velocity)
In a throttling device, what do we get as SFEE when changes in PE and KE are taken zero?
For an inviscid frictionless fluid flowing through a pipe, Euler equation is given by
Which of the following is true for a discharging tank?
The process is adiabatic
The process is quasi-static
dQ=0
All of the mentioned
In ____ filling a bottle with air at 300K, the gas temperature rises to 420K due to flow work being converted to ____ increase.
Adiabatically, heat
Adiabatically, internal energy
Constant pressure, heat
None of the mentioned
Variable flow processes can be analysed by
System technique
Constant volume technique
Both of the mentioned
None of the mentioned
Rate of energy increase within the control volume is given by
Rate of energy inflow + rate of energy outflow
Rate of energy inflow – rate of energy outflow
Rate of energy inflow = rate of energy outflow
None of the mentioned
Variable flow processes include
Filling up a gas cylinder
Evacuating a gas cylinder
All of the mentioned
None of the mentioned
The Bernoulli equation is restricted to _____ fluids but the SFEE is valid for _____ fluids as well.
Viscous compressible, frictionless incompressible
Frictionless incompressible, viscous compressible
Viscous incompressible, frictionless compressible
None of the mentioned
For an adiabatic compressor or pump,
The enthalpy of fluid remains constant with the amount of work input
The enthalpy of fluid decreases by the amount of work input
The enthalpy of fluid increases by the amount of work input
None of the mentioned
For a turbine, it is seen that work is done by the fluid at the expense of its enthalpy.
True
False
Turbines and engines ____ positive power output, and compressors and pumps ____ power input.
Require, give
Give, require
Give, give
Require, require
Fluid flow through which of the following throttles the flow?
Partially opened valve
Orifice
Porous plug
All of the mentioned
What does a diffuser do?
Increases the pressure of the fluid at the expense of its KE
Decreases the pressure of the fluid and also increases its KE
Increases the pressure of the fluid and also its KE
Decreases the pressure of the fluid and also its KE
What does a nozzle do?
Decreases the velocity of a fluid at the cost of its pressure gain
Increases the velocity of a fluid at the cost of its pressure drop
Increases the velocity of a fluid and also its pressure
None of the mentioned.
