Thermal efficiency of an internal combustion engine is around ______________ percent?

Related Mcqs:

In connection with corrosion of metals, passivation is the process that__________________?

A. Intensifies deterioration B. Changes the composition of the metal C. Inhibits further deterioration D. None of these...

The transition temperature at which all the ferromagnetic materials become paramagnetic materials is termed as the ‘Curie temperature’. Its value for cobalt is ______________ °C?

A. 768 B. 1127 C. 1359 D. 1480...

For the irreversible reaction, Ca+ 2C = Ca C2 , Δ H°298 = – 60000 J . mole-1 . If a system initially containing 2 moles of calcium, 3 moles of carbon and 1 mole of calcium carbide is allowed to react to completion, the heat evolved at 298 K will be__________________?

A. 30,000 J B. 60,000 J C. 90,000 J D. 2,40,000 J...

Shrinkage allowance on pattern is provided to compensate for shrinkage when the _____________________?

A. Metal changes from liquid state to solid state at freezing temperature B. Solid phase temperature drops from freezing temperature to the room temperature C. Liquid metal temperature drops from pouring temperature to room temperature D. Liquid metal temperature drops from pouring temperature to freezing temperature...

_______________ rubber is generally used for making ‘O’ rings used for vacuum sealings?

A. Natural B. Neoprene C. Butadiene D. Nitrile...