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Guide on Boiler MCQ (Boiler Multiple Choice Questions and Answers) is best if you want to learn more on the concept of Boiler, this guide on Boilers will improve your existing knowledge.
You can also download this Boiler MCQ (Boiler Multiple Choice Questions) guide for free here! MCQs on Boiler (Questions and Answers) guide will help all students in learning more deeply about Boilel. We have created this guide on Boiler MCQ for all the aspiring students who want to know more deeply about this concept.
Presence of moisture inside the fuel oil will
(A) Make the burner tips cool
(B) Raise proper combustion
(C) Because sputtering, possibly extinguishing flame
(D) Clean up the nozzles
Correct Answer C
In a steam condenser, the partial pressure of steam and air are 0.06 bar and 0.007 bar respectively. The condenser pressure would be?
(A) 0.007 bar
(B) 0.053 bar
(C) 0.06 bar
(D) 0.067 bar
Correct Answer D
Which cannot be called as correct statement regarding the effect of sulphur in fuel?
(A) Consists heating value
(B) Assists in electrostatic precipitation of ash in flue gases
(C) It will lead to corrosion of air heaters, ducting, etc. if flue gas exit temperature is low
(D) It will erode furnace walls
Correct Answer D
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The isentropic enthalpy drop in moving blade is two-third of the isentropic enthalpy drop in fixed blades of a turbine. The degree of reaction is going to be?
(A) 0.4
(B) 0.56
(C) 0.67
(D) 1.67
Correct Answer A
A turbine will have an axial discharge when the steam leaves the blade tip at _________ in the direction of the blade motion.
(A) 60°
(B) 90°
(C) 180°
(D) 270°
Correct Answer B
The principal function of a stop valve will be to
(A) Control the flow of steam from the boiler to the main pipe and to shut off the steam wholly if it is needed
(B) Empty the boiler when needed and to discharge the mud, scale or sediments which are accumulated at the bottom of the boiler
(C) Put off fire inside the furnace of the boiler when the level of water in the boiler falls to an unsafe limit
(D) Increase the temperature of saturated steam without increasing its pressure
Correct Answer A
Fire tube boilers are restricted to a maximum design working pressure of
(A) 1 kg/cm
(B) 6 kg/cm
(C) 17 kg/cm²
(D) 100 kg/cm²
Correct Answer C
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The critical pressure ratio (p₂/p₁) would be given by?
(A) (p₂/p₁) = [2/(n – 1)] n/(n + 1)
(B) (p₂/p₁) = [2/(n + 1)] n/(n-1)
(C) (p₂/p₁) = [(n – 1)/2] n + (1/n)
(D) (p₂/p₁) = [(n + 1)/2] n – (1/n)
Correct Answer B
Water tube boilers can be called as
(A) Internally fired
(B) Externally fired
(C) Internally and also externally fired
(D) None of these
Correct Answer B
The bituminous coal will be no caking if its carbon content is
(A) 78-81%
(B) 81-85%
(C) 85-90%
(D) 90-95%
Correct Answer A
The flow through a nozzle could be taken as
(A) Constant volume flow
(B) Constant pressure flow
(C) Isothermal flow
(D) Isentropic flow
Correct Answer D
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A device that is utilized to increase the temperature of saturated steam without raising its pressure, can be called as
(A) Blow off cock
(B) Fusible plug
(C) Super heater
(D) Stop valve
Correct Answer C
Orsat meter can be utilized as
(A) Gravimetric analysis of the flue gases
(B) Volumetric analysis of the flue gases
(C) Mass flow of the flue gases
(D) Measuring smoke density of flue gases
Correct Answer B
The Parsons’ reaction turbine consists of
(A) Only moving blades
(B) Only fixed blades
(C) Identical fixed and moving blades
(D) Fixed and moving blades of different shape
Correct Answer C
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A single acting steam engine creates __________ power than that of double acting steam engine.
(A) Equal
(B) Half
(C) Double
(D) Four times
Correct Answer
Correct Answer B
Which of the following substance is going to have a same percentage in both proximate and ultimate analysis?
(A) Ash
(B) Volatile matter
(C) Moisture
(D) Hydrogen
Correct Answer A
The steam will enter into the nozzle at a
(A) High pressure and a low velocity
(B) High pressure and a high velocity
(C) Low pressure and a low velocity
(D) Low pressure and a high velocity
Correct Answer A
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By compounding the expansion of steam in two or more cylinders, the length of stroke
(A) Does not change
(B) Increases
(C) Decreases
(D) None of these
Correct Answer C
The diameters of fire tubes and super heater tubes in locomotive boiler would be?
(A) 47.5 mm, 130 mm
(B) 32.5 mm, 180 mm
(C) 65.5 mm, 210 mm
(D) 24.5 mm, 65 mm
Correct Answer A
The effect of friction upon the flow of steam through a nozzle will be to?
(A) Decrease the mass flow rate + to increase the wetness of steam
(B) Increase the mass flow rate + to increase the exit temperature
(C) Decrease the mass flow rate + to decrease the wetness of steam
(D) Increase the exit temperature without on mass flow rate
Correct Answer C
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Throttle governing of steam engines can be called as a method of controlling the engine output by varying
(A) Volume of intake steam
(B) Pressure of intake steam
(C) Temperature of intake steam
(D) All of these
Correct Answer B
With increase in load, convection super heater has
(A) Drooping characteristic
(B) Linear characteristic
(C) Rising characteristic
(D) Flat characteristic
Correct Answer C
In order to decrease to rotor speed of an impulse turbine, the method employed will be?
(A) Velocity compounding
(B) Pressure compounding
(C) Pressure-velocity compounding
(D) All of these
Correct Answer D
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In case of condensing steam engines, the pressure of steam in the cylinder while exhaust stroke is _________ the atmospheric pressure.
(A) Equal to
(B) Lower than
(C) Higher than
(D) None of these
Correct Answer C
Ultimate analysis of fuel is basically a determination of percentage of
(A) Carbon, hydrogen, nitrogen, Sulphur, moisture
(B) Fixed carbon, ash, volatile matter, moisture
(C) Higher calorific value
(D) Lower calorific value
Correct Answer A
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Which of the following statement can be called as correct?
(A) The basic efficiency of steam turbines will be much greater than steam engines
(B) A flywheel should be present for steam turbine
(C) The turbine blades do not change the direction of steam issuing from the nozzle
(D) The pressure of steam, in reaction turbines, is increased in fixed blades and also in moving blades
Correct Answer A
By compounding the expansion of steam in two or more cylinders, the ratio of expansion
(A) Does not change
(B) Increases
(C) Decreases
(D) None of these
Correct Answer C
The proximate analysis of fuel lists
(A) Various chemical constituents, carbon, hydrogen, oxygen etc, plus ash as percents by volume
(B) Various chemical constituents, carbon, hydrogen, oxygen, etc. plus ash as percent’s by weight
(C) Fuel constituents as percent by volume of moisture, volatile, fixed carbon and ash
(D) Fuel constituents as percent by weight of moisture, volatile, fixed carbon and ash
Correct Answer D
You can also download this Boiler MCQ (Boiler Multiple Choice Questions) guide for free here!
A steam turbine, in which a part of the steam after partial expansion, could be used for process heating and the leftover steam is further expanded for power generation, can be called as
(A) Back pressure turbine
(B) Pass out turbine
(C) Low pressure turbine
(D) Impulse turbine
Correct Answer B
Willian’s law states that the steam consumption per hour provided with a throttled governor is proportional to (where I.P. = Indicated power)
(A) 1/(I.P)
(B) 1/(I.P)²
(C) I.P.
(D) (I.P.)²
Correct Answer C
You can also download this Boiler MCQ (Boiler Multiple Choice Questions) guide for free here!
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