Related Questions

Ceramic recuperators compared to metallic recuperators for the same duty
A Are lighter
B Occupy more space
C Are less costly
D Have higher pressure differential between flue gas & air side
Ceramic recuperators used for waste heat recovery from high temperature flue gas going out of the furnace is made of
A Fireclay
B Silicon carbide
C Corrundum
D Siliceous fireclay
Ceramic recuperators (made of SiC) is economical, only when used for preheating combustion air above __________ °C.
A 250
B 650
C 850
D 1000
Metallic recuperators are not used for waste heat recovery, if the hot flue gas temperature is above __________ °C, because corrosion prevails at higher temperatures.
A 350
B 750
C 1050
D 1250
Regenerators compared to the recuperators for the same duty
A Occupy more space
B Are less costly
C Are of smaller size
D All of the above
Regenerators as compared to recuperators for the same duty
A Store smaller quantity of waste heat
B Are lighter & compact
C Involve higher initial cost
D All of the above
Ceramic nuclear metals compared to solid nuclear metals have
A higher melting points
B low strength at high temperature
C more chances of radiation damage
D poorer corrosion resistance
A mica capacitor and a ceramic capacitor both have the same physical dimensions. Which will have more value of capacitance ?
A Ceramic capacitor
B Mica capacitor
C Both will have identical value of capacitance
D It depends on applied voltage
Which of the following ceramic packing materials is the costliest of all?
A Berl saddles
B Raschig rings
C Pall rings
D Intalox saddles
Ceramic coating material for furnace refractory, which increases its emissivity and thus the radiation heat transfer rate in the furnace, comprises of
A Graphite powder
B Thoria
C Zircon powder
D Beryllium

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