Expanding steam to a very low pressure (high vacuum) in steam engines is _________________?

Related Mcqs:

Stoichiometric quantity of air is the___________________?

A. air present in atmosphere at NTP conditions B. air required for complete combustion of fuel with no excess air C. air required for optimum combustion so as to have reasonable excess air D. air required to convert CO into C02 E. air required to form an explosive mixture...

Water tube boilers are those in which________________?

A. flue gases pass through tubes and water around it B. water passes through the tubes and flue gases around it C. work is done during adiabatic expansion D. change in enthalpy E. none of the above...

The change in internal energy in steam engines equals to__________________?

A. work done during the rankine cycle ; B. work done during compression. C. work done during adiabatic expansion D. change in enthalpy E. none of the above...

Fusible plug for boilers is made of fusible metal containing tin, lead, and___________________?

A. bismuth B. copper C. aluminium D. nickel E. iron...

Tertiary air is the air used to____________________?

A. provide air around burners for obtaining optimum combustion B. transport and dry the coal C. cool the scanners D. supply air for ignitors E. convert CO (formed in lower zone of furnace) into C02 at higher zone...