ENGINEERING THERMODYNAMICS QUIZ

Barometric pressure is equal to

735.6 mm Hg

Zero mm Hg

1 mm Hg

760 mm Hg

TRUE ANSWER : ?
YOUR ANSWER : ?

The fuel mostly used in steam boilers is

Peat

Non-coking bituminous coal

Coking bituminous coal

Brown coal

TRUE ANSWER : ?
YOUR ANSWER : ?

A mixture of gas expands from 0.03 m3 to 0.06 m3 at a constant pressure of 1 MPa and absorbs 84 kJ of heat during the process. The change in internal energy of the mixture is

114 kJ

30 kJ

84 kJ

54 kJ

TRUE ANSWER : ?
YOUR ANSWER : ?

When the gas is heated at constant volume, the heat supplied

Both (A) and (B)

Does some external work during expansion

None of these

Increases the internal energy of the gas and increases the temperature of the gas

TRUE ANSWER : ?
YOUR ANSWER : ?

Isochoric process is one in which

Very little mechanical work is done by the system

All parameters remain constant

No mechanical work is done by the system

Free expansion takes place

TRUE ANSWER : ?
YOUR ANSWER : ?

If a system after undergoing a series of processes, returns to the initial state then

Process is executed in closed system cycle

Its entropy will change due to irreversibility

Process is thermodynamically in equilibrium

Sum of heat and work transfer will be zero

TRUE ANSWER : ?
YOUR ANSWER : ?

In an isothermal process, the internal energy of gas molecules

Increases

Remain constant

Decreases

May increase/decrease depending on the properties of gas

TRUE ANSWER : ?
YOUR ANSWER : ?

The condition for the reversibility of a cycle is

All the processes, taking place in the cycle of operation, must be extremely slow

The pressure and temperature of the working substance must not differ, appreciably, from those of the surroundings at any stage in the process

The working parts of the engine must be friction free

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

First law of thermodynamics furnishes the relationship between

Heat, work and properties of the system

Various properties of the system

Heat and work

Various thermodynamic processes

TRUE ANSWER : ?
YOUR ANSWER : ?

Change in enthalpy of a system is the heat supplied at

Constant entropy

Constant temperature

Constant volume

Constant pressure

TRUE ANSWER : ?
YOUR ANSWER : ?