Economiser is used to heat_____________?
Economiser is used to heat_____________?
A. air
B. feed water
C. flue gases
D. all above
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Under-feed stokers work best for _________ coals high in volatile matter and with caking tendency?
Under-feed stokers work best for _________ coals high in volatile matter and with caking tendency?
A. anthracite
B. lignite
C. semibituminous and bituminousCarnot cycle comprises of_______?
Carnot cycle comprises of_______?
A. two isentropic processes and two constant volume processes
B. two isentropic processes and two constant pressure processes
E. two isothermal processes and three constant pressure processes
D. none of the aboveWhich material is used to made a solar cell_______________?
Which material is used to made a solar cell_______________?
A. aluminum
B. Germanium
C. silicon
D. scandiumThe percentage 02 by volume in atmosphere air is____________?
The percentage 02 by volume in atmosphere air is____________?
A. 21%
B. 23%
C. 77%
D. 79%Load carrying capacity of belt conveyor is about___________?
Load carrying capacity of belt conveyor is about___________?
A. 20 to 40 tonnes/hr
B. 50 to 100 tonnes/hr
C. 100 to 150 tonnes/hr
D. 150 to 200 tonnes/hrThe draught which a chimney produces is called_____________?
The draught which a chimney produces is called_____________?
A. induced draught
B. natural draught
C. forced draught
D. balanced draught