As the piston is compressed, __________ is forced through the orifices.strut oilPAG oilwaterthylene glycol

In turbojets with purely converging propelling nozzles, part of the thrust is also generated by the pressure difference:Group of answer choicesOnly when the flow is chokedBoth a and cWhether the flow is choked or notWhen the nozzle is operated overexpanded

Air in a cylinder is suddenly compressed by a piston, which is then maintained at the same position, with the passage of timeA     The pressure decreasesB     The pressure increasesC     The pressure remain constant D     The pressure may increase depending upon the nature of the gas

During the isentropic expansion of a flow in an ideal choked diverging nozzle:Group of answer choicesThe static pressure is decreasing as the velocity and Mach number decreasesThe static pressure remains constantThe total enthalpy and the static pressure are dropping as the Mach number increasesThe static pressure is decreasing as the velocity and Mach number increases

What is the stagnation pressure?Group of answer choicesThe sum of the static pressure and the specific kinetic energyThe pressure that would be reached during adiabatic, reversible stagnation of a moving fluidThe pressure that would be reached during an adiabatic deceleration of a moving fluid (reversible or irreversible)All of the above

In a closed hydraulic system, a force applied by a smaller piston through a fluid will translate to a(n) ______ force applied by the fluid on a larger piston. Group of answer choicessmallerequivalentlarger