Chapter 1. Basic Terminology and Energy

 IMP Questions

Que 1. What is Prime mover? OR Define Prime mover. (GTU – Summer 2009, 2010, 2018, Winter 2019).
Answer:- A prime mover is a device which uses energy from natural sources and converts it into mechanical energy.

Que 2. How are prime movers classified? (GTU – Summer 2009, Winter 2010)
Or Que2. Write any four examples of prime movers.(GTU – Winter 2019)

Answer:-

Prime movers are classified according to the sources of energy utilized by them.
Classification of Prime Movers

Que:3. Define / Explain Specific heat. (GTU – Summer 2010, 2014, Winter 2010, 2013)

Answer:-

Specific heat capacity (also called specific heat) of a substance is defined as the amount of heat required to raise the temperature of a unit mass of substance through one degree.

Its value is different for different substances.

It is denoted by C.

SI unit: J/kg·K

Larger unit: kJ/kg·K

Heat Capacity: The product of mass and specific heat (mC) is called the heat capacity of the substance.

Specific Heat at Constant Volume (Cᵥ): It is defined as the amount of heat required to raise the temperature of a unit mass of substance through one degree when it is heated at constant volume.

Specific Heat at Constant Pressure (Cₚ): It is defined as the amount of heat required to raise the temperature of a unit mass of substance through one degree when it is heated at constant pressure.