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
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
A passenger paid 50% customs duty on accompanied baggage items. He paid another 20% sales tax on the total value of the items plus the custom duty paid. The total custom duty and sales tax is Tk. 350. what is the value of the item custom duty and sales tax?
A Tk.400
B Tk. 450
C Tk. 500
D None these
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
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
Ceramic recuperators are generally made of
A Silicon carbide
B Calcium carbide
C Fireclay bricks
D High alumina bricks
In case Nicholas and Antonio share dinner duty on Monday of the same week and if Antonio and Jeremy share dinner duty on Thursday of the same week. Which of the following would be true for that week?
A Jerry is on dinner duty alone on Wednesday.
B Nicholas and Jeremy share dinner duty on Wednesday.
C Nicholas is on duty alone on Tuesday and Antonio is on breakfast duty alone on Wednesday.
D Jeremy is on breakfast duty alone on Tuesday, and Nicholas is on breakfast duty alone on Wednesday.
Coke oven regenerators are made of __________ bricks.
A Fire clay
B Silica
C Low thermal conductivity
D High electrical conductivity
Regenerators are installed in
A Coke ovens
B Open hearth furnace
C Both A & B
D Neither A nor B

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