Mechanical Engineering MCQs

2075 MCQs  (Page 145 of 208)

Attempt Mechanical Engineering Mcqs Quiz
Fire tube boilers are limited to a maximum design working pressure of ____________________?
A. 1 kg/cm
B. 6 kg/cm
C. 17 kg/cm2
D. 100 kg/cm2
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The relative heat absorption for successively added equal areas of boiler convection heating surfaces____________________?
A. Increases
B. Decreases
C. Remains unaffected
D. First increases and then decreases
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The steam temperature with increase in load in case of a boiler fitted with radiation super heater________________?
A. Increases
B. Decreases
C. Remains unaffected
D. First increases and then decreases
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Maximum energy loss in a boiler occurs due to _______________________?
A. Unburnt carbon in ash
B. Incomplete combustion
C. Ash content
D. Flue gases
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A supercritical boiler is one that operates above the pressure and temperature of following values_____________________?
A. 100 kg/cm2 and 540°c
B. 1 kg/cm2 and 100°c
C. 218 kg/cm2 abs and 373°c
D. 218 kg/cm2 abs and 540°c
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The balanced draft furnace is one using _________________________?
A. Induced draft fan and chimney
B. Induced draft fan and forced draft fan
C. Forced draft fan and chimney
D. Any one of the above
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Evaporative capacity of boiler is expressed as____________________?
A. Kg of steam produced
B. Steam pressure produced
C. Kg of fuel fired
D. Kg of steam produced per kg of fuel fifed
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Incomplete combustion can be best judged by__________________?
A. Smoky chimney exit
B. Excess air in flue gases
C. Measuring carbon mono-oxide in flue gases
D. Measuring temperature of flue gases at exit of furnace
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Pulverized fuel is used for___________________?
A. Better burning
B. More calorific value
C. Less radiation loss
D. Medium sized units
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Heating value of fuel used is as on fired basis. If it is reported for dry or moisture free fuel, then latter should be multiplied by the following factor to correct for as fired value ___________________?
A. (1- mositure content)
B. (1 + mositure content)
C. 1 + mositure content
D. 1 – mositure content
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Word of the Day
28 Sep
Expatriate
a person who lives outside their native country.
ملک بدری، جلا وطن کرن، شہر بدر کرنا

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