Preheating of ______________ the flame temperature?

Related Mcqs:

To avoid fire by spontaneous combustion of coal due to its low temperature oxidation, it should be stored in___________________?

A. Shallow and small piles B. Fine sizes without the presence of any lump C. Closed space without any ventilation facility D. Large heaps with small surface to volume ratio...

A coal gasifier operating at 20 atm. (e.g. Lurgi gasifier) as compared to one operating at atmospheric pressure (e.g. Kopper-Totzek or Winkler gasifier) will produce a gas having _____________________?

A. Higher methane content and thus higher calorific value B. Higher carbon monoxide content C. Lower carbon dioxide content D. None of these...

Artificial draught produced by a fan can be controlled by the___________________?

A. Speed of the fan B. Damper C. Variation in the pitch of the fan blades D. All A., B. and C....

Proximate analysis of coal determines its ______________ content?

A. Moisture, ash, sulphur & volatile matter B. Moisture, volatile matter, ash & fixed carbon C. Moisture, sulphur, nitrogen & fixed carbon D. None of these...

Coke ovens in steel plant are heated by ___________________?

A. Electricity B. Coke oven gas C. Mixed gas D. Both B. & C....