Spontaneous combustion is a phenomenon in which____________________?

Related Mcqs:

Carbonation of coal is the process of________________________?

A. pulverising coal in inert atmosphere B. heating wood in a limited supply of air at temperatures below 300°C C. strongly heating coal continuously for about 48 hours in the absence of air in a closed vessel D. binding the pulverised coal into brick-ettes E. enriching carbon in the coal...

On Mollier chart, free expansion, or throttling process from high pressure to atmosphere is represented by_______________?

A. horizontal straight line B. vertical straight line C. straight inclined line D. curved line E. none of the above...

Hard coke is produced by carborisation of coal at_______________?

A. atmospheric temperature B. 500-600°C C. 70O-850°C D. 95O-1100°C E. 120O-1500°C...

Boiler H.P. is defined as the ________________ ?

A. steam evaporation rate per kg of fuel fired B. work done in evaporating 1 kg of steam per hour from and at 100°C into dry saturated steam C. the evaporation of 15.65 kg of water per hour from and at 100°C into dry saturated steam D. work done by 1 kg of steam at … Boiler H.P. is defined as the ________________ ?Read More...

For the same diameter and thickness of tube, a water tube boiler compared to a fire tube boiler has ____________________?

A. more heating surface B. less heating surface C. equal heating surface D. heating surface depends on other parameters E. none of the above...