Otto Cycle
1 / 10
The Otto cycle is less efficient than:
 Explanation: The Carnot cycle sets the maximum efficiency limit, unlike Diesel, Brayton, or Rankine cycles. Otto efficiency depends on compression ratio.
2 / 10
In the Otto cycle’s adiabatic compression:
 Explanation: Adiabatic compression raises temperature via work input, unlike expansion or isothermal processes. No heat is added; volume decreases.
3 / 10
The Otto cycle assumes:
Explanation: The Otto cycle assumes ideal gas behavior for analysis, unlike real gases or irreversible processes. Combustion is at constant volume, not pressure.
4 / 10
The Otto cycle is typically modeled in:
Explanation: Piston-cylinders enable isochoric and adiabatic processes, unlike open systems or nozzles in flow cycles. Heat exchangers involve heat transfer.
5 / 10
The Otto cycle’s heat rejection occurs at:
Explanation: Heat rejection is isochoric, unlike constant-pressure in Diesel or isothermal in Carnot. Adiabatic processes involve no heat transfer.
6 / 10
The efficiency of the Otto cycle depends on:
Explanation: Efficiency increases with compression ratio (η = 1 - 1/r^(γ-1)), unlike pressure ratios in Brayton or temperature in Carnot. Work output is a result.
7 / 10
The adiabatic processes in the Otto cycle involve:
 Explanation: Adiabatic compression and expansion have no heat transfer, unlike isobaric or isothermal processes. Volume and temperature change, not remain
8 / 10
In the Otto cycle, heat addition occurs at:
Explanation: Heat addition in the Otto cycle is isochoric (constant volume), unlike constant-pressure in Diesel or isothermal in Carnot. Adiabatic processes have no heat.
9 / 10
The Otto cycle consists of how many processes?
 Explanation: The Otto cycle includes two isochoric and two adiabatic processes, unlike cycles with fewer or more steps. Four processes define its structure.
10 / 10
The Otto cycle is primarily used in:
Explanation: The Otto cycle models spark-ignition engines like petrol engines, unlike diesel engines or gas turbines. Refrigeration uses vapor-compression cycles.
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