PV Work, Shaft Work, Electrical Work
1 / 10
Shaft work is measured by:
Explanation: Shaft work involves torque applied over angular displacement in rotating systems. Other options relate to PV work, electrical work, or heat.
2 / 10
PV work in an isobaric process depends on:
Explanation: In constant-pressure (isobaric) processes, PV work is , driven by volume change. Other options relate to different work types or processes.
3 / 10
Negative electrical work indicates
Explanation: Negative electrical work occurs when the system (e.g., motor) receives electrical energy. Positive work is done by systems like generators; heat is separate.
4 / 10
In the First Law, PV work affects:
Explanation: PV work in closed systems changes internal energy via . Enthalpy is key in open systems; entropy and temperature are secondary effects.
5 / 10
Electrical work is significant in:
Explanation: Electric motors convert electrical energy to work via voltage and current. Other devices primarily involve PV work, shaft work, or heat transfer.
6 / 10
Positive shaft work occurs in:
Explanation: Turbines produce shaft work by rotating blades, doing work on surroundings. Pumps and compressors require work input; heat exchangers focus on heat.
7 / 10
PV work is zero in a:
Explanation: No volume change in a rigid container means no PV work. Other processes involve work if volume changes occur.
8 / 10
Electrical work involves:
Explanation: Electrical work is driven by voltage and current, as in motors or generators. PV work, shaft work, and heat are distinct energy transfer mechanisms.
9 / 10
Shaft work is most relevant in:
Explanation: Shaft work, like in turbines or pumps, involves energy transfer in flow systems. Closed systems prioritize PV work; isolated systems have no work.
10 / 10
PV work is associated with:
Explanation: PV work occurs when a system’s volume changes under pressure, like gas expanding in a piston. Other options relate to shaft work (rotation) or electrical work (current).
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