Related Questions

An improved and fuel efficient version of the pusher type reheating furnace is the __________ furnace.
A Walking beam
B Shaft
C Tunnel
D Rotary hearth
Reheating furnace (pusher type) is used for heating
A Ingots
B Slabs
C Steel coils
D Steel sheets
The thermal efficiency of a steel slab reheating furnace (walking beam type) may be about __________ percent.
A 15
B 40
C 70
D 85
The heating capacity of muffle furnace depends on the
A Surface area & emissivity of the stock
B Properties of the muffle wall (temperature, area, emissivity)
C Both A & B
D Neither A nor B
Size of the combustion chamber of a furnace depends upon the
A Heat release rate of the fuel
B Preheat temperature of fuel & air
C Method of mixing the fuel & air
D All of the above
The amount of combustible escaping uncon-sumed from the furnace, depends upon the
A Air supplied and furnace temperature
B Burner design (thoroughness of mixing versus stratification)
C Air preheat and the flow of gases in the furnace (mixing by induction, by acceleration or by change of direction)
D All of the above
Design of waste heat boiler for recovery of waste heat from furnace gases depends upon the
A Quantity & temperature of waste gas
B Dust concentration & nature of dust in waste gas
C Corrosive nature of the waste gas
D All of the above
The rate of scaling of furnace stock depends upon the
A Temperature
B Time
C Nature of atmosphere
D All of the above
In open cycle turbojet engines used in military aircraft, reheating the exhaust gas from the turbine by burning, more fuel is used to increase the
A Thrust and range of aircraft
B Efficiency of the engine
C Both (A) and (B)
D None of these
Reheating in a multistage expansion gas turbine ________ compressor work.
A Has no effect on
B Decreases
C Increases
D None of these

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