100+ IAS Objective Questions and Answers - 1
Define efficiency of a heat engine?
The efficiency of a heat engine is the ratio between work done by the heat to the amount of heat supplied.
The efficiency of an engine = Work done by heat / Amount of heat supplied.
Define temperature, heat?
Temperature is the measure of average heat or thermal energy of the particles in a substance. It does not depend on the number of particles or size and shape of the object.
Heat is the Internal energy of a substance. By adding or removing heat the temperature of the substance can be increased or decreased.
What is the efficiency of a diesel engine?
The efficiency of a diesel engine = 40%.
What is absolute zero?
The point at which speed of molecules is zero is known as absolute zero.
What are the differences between petrol engine and diesel engine?
1. Petrol + air is used as fuel.
2. Spark plug and carburetter are used.
3. The fuel air mixture is compressed to 1/8 of its volume.
1. Diesel + air is used as fue.
2. No spark plug but carburetter is used.
3. The fuel air mixture is compressed to 1/16 of the
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