Related Questions

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
Width of the coke oven towards coke side is slightly more than that on pusher side to
A Facilitate easy discharging of coke as it swells during carbonisation
B Facilitate uniform heating of the oven
C Increase the output of the coke
D None of these
The heating capacity of continuous reheating furnace depends upon the
A Hearth area and furnace temperature
B Emissivity of the stock
C Ratio of wall surface to stock surface
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
The pilot of a small aircraft with a 40 gallon fuel tank wants to fly to Cleveland , which is 480 miles engine , which can fly only 8 miles per gallon, will not get him there , By how many miles per gallon must the aircraft's fuel efficiency be improved to make the fight to Cleveland possible?
A 160
B 12
C 40
D 4
If h₁ = inner film co-efficient and /h₂ = outer film co-efficient, then the overall heat transfer co-efficient is
A Always less than h₁
B Always between h₁ and h₂
C Always higher than h₂
D Dependent on metal resistance
Reheating in a multistage expansion gas turbine ________ compressor work.
A Has no effect on
B Decreases
C Increases
D None of these
Reheating in a gas turbine
A Increases the thermal efficiency
B Increases the compressor work
C Increases the turbine work
D Decreases the thermal efficiency
The main purpose of reheating in gas turbine is to
A Increase temperature
B Reduce turbine size
C Increase power output
D Increase speed

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