Thermodynamics - Mechanical Engineering Questions and Answers

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

1 kgf/cm² is equal to

760 mm Hg

Zero mm Hg

735.6 mm Hg

1 mm Hg

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

Work done is zero for the following process

Constant volume

Free expansion

Throttling

All of the above

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

The fuel mostly used in blast furnace for extracting pig iron from iron ores is

Hard coke

Soft coke

Pulverized coal

Bituminous coal

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

On weight basis, air contains following parts of oxygen

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

On volume basis, air contains following parts of oxygen

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

A gas is compressed in a cylinder by a movable piston to a volume one half its original volume. During the process 300 kJ heat left the gas and internal energy remained same. The work done on gas in Nm will be

300 Nm

300,000 Nm

30 Nm

3000 Nm

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

Gases have

Only one value of specific heat

Two values of specific heat

No value of specific heat

Under some conditions one value and sometimes two values of specific heat

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

According to Dalton's law, the total pressure of the mixture of gases is equal to

Greater of the partial pressures of all

Average of the partial pressures of all

Sum of the partial pressures of all

Sum of the partial pressures of all divided by average molecular weight

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

When a gas is heated, change takes place in

Temperature

Pressure

Volume

All of these