## Engineering Thermodynamics When the gas is heated at constant pressure, the heat supplied

Does some external work during expansion
Both (B) and (C)
Increases the temperature of the gas
Increases the internal energy of the gas

## Engineering Thermodynamics The door of a running refrigerator inside a room was left open. Which of the following statements is correct?

The room will be cooled to the temperature inside the refrigerator
The temperature of the air in room will remain unaffected
The room will be gradually warmed up
The room will be cooled very slightly

## Engineering Thermodynamics Energy can neither be created nor destroyed but can be converted from one form to other is inferred from

Second law to thermodynamics
First law of thermodynamics
Basic law of thermodynamics
Zeroth low of thermodynamic

## Engineering Thermodynamics Gases have

Two values of specific heat
Under some conditions one value and sometimes two values of specific heat
Only one value of specific heat
No value of specific heat

## Engineering Thermodynamics Otto cycle consists of

One constant pressure, one constant volume and two isentropic processes
Two constant volume and two isentropic processes
Two constant volume and two isothermal processes
Two constant pressure and two isentropic processes

## Engineering Thermodynamics In a no flow reversible process for which p = (-3V + 15) × 105 N/m², V changes from 1 m3 to 2 m3. The work done will be about

10 × 10⁵ joules
100 × 10⁵ joules
10 × 10⁵ kilo joules
1 × 10⁵ joules