⚙️ 100 Steam Boilers and Steam Engines MCQs with Answers (Mountings, Accessories & Working) – Practice Test

Practice Steam Boilers and Steam Engines MCQs with answers covering boiler types, mountings, accessories, steam generation, and engine working principles

Attempt all 100 questions, choose the correct option, and check your live score instantly at the end

Question 1: In a high-pressure water tube boiler operating under steady conditions, which factor primarily governs the rate of steam generation apart from heat input?

Question 2: In a Lancashire boiler, the function of Galloway tubes is mainly to enhance which of the following characteristics?

Question 3: In comparison to fire tube boilers, water tube boilers are preferred for high pressure applications because they:

Question 4: In a steam engine, the purpose of a steam jacket provided around the cylinder is to:

Question 5: In boiler mountings, the primary function of a fusible plug is to protect the boiler against:

Question 6: In a simple steam engine cycle, the clearance volume primarily affects which of the following parameters?

Question 7: In forced draught systems used in modern boilers, the main advantage over natural draught is:

Question 8: In a multi-tubular fire tube boiler, increasing the number of tubes mainly results in:

Question 9: In steam engines, wire drawing during admission of steam leads to:

Question 10: In economizers used in boiler systems, the main purpose is to:

Question 11: In a steam engine, the cutoff ratio mainly influences which of the following?

Question 12: In a high capacity boiler, superheating of steam is mainly done to:

Question 13: In boiler accessories, the function of air preheater is to:

Question 14: In a steam engine indicator diagram, the area under the curve represents:

Question 15: In a boiler, priming refers to:

Question 16: In steam boilers, blow down operation is mainly carried out to:

Question 17: In a compound steam engine, the main advantage is:

Question 18: In a boiler system, natural draught is produced due to:

Question 19: In steam engines, condensation of steam inside cylinder leads to:

Question 20: In boiler performance analysis, equivalent evaporation is used to:

Question 21: In a high pressure boiler using forced circulation, the primary advantage over natural circulation is related to which operational parameter?

Question 22: In a Cochran boiler, the hemispherical shape of the crown is mainly provided to:

Question 23: In steam engines, the phenomenon of re-evaporation during exhaust is mainly due to:

Question 24: In a boiler, scale formation on heating surfaces leads to which major operational problem?

Question 25: In a compound steam engine, the work distribution among cylinders is optimized to:

Question 26: In boiler draught systems, induced draught is created by:

Question 27: In a steam engine, the term mean effective pressure represents:

Question 28: In water tube boilers, the risk of explosion is lower mainly because:

Question 29: In steam boilers, priming can be reduced by which of the following methods?

Question 30: In a steam engine, clearance volume leads to which thermodynamic effect?

Question 31: In a boiler, the function of a safety valve is to:

Question 32: In a steam engine, wire drawing occurs mainly due to:

Question 33: In boiler accessories, a superheater increases efficiency by:

Question 34: In steam engines, condensation losses are minimized by:

Question 35: In a boiler, blow down is necessary to:

Question 36: In a steam engine, the function of a governor is to:

Question 37: In a boiler, economizer improves efficiency by:

Question 38: In a boiler, draught is defined as:

Question 39: In a steam engine, the expansion ratio affects:

Question 40: In a boiler, the function of a feed check valve is to:

Question 41: In a high pressure boiler, the use of supercritical pressure eliminates which of the following phenomena during steam generation?

Question 42: In a steam engine, the effect of early cut off is to:

Question 43: In boiler performance, evaporation ratio is defined as:

Question 44: In a water tube boiler, the main reason for using small diameter tubes is to:

Question 45: In a steam engine indicator diagram, a loop near the admission line indicates:

Question 46: In a boiler furnace, the excess air supplied beyond theoretical requirement results in:

Question 47: In a compound steam engine, the intermediate pressure is selected such that:

Question 48: In boiler draught, balanced draught system combines:

Question 49: In a steam engine, back pressure mainly affects:

Question 50: In boiler water treatment, the main objective is to:

Question 51: In a once-through boiler, the main distinguishing feature compared to conventional boilers is:

Question 52: In a boiler, the presence of dissolved oxygen in feed water leads to:

Question 53: In steam engines, cushioning effect at the end of stroke is mainly due to:

Question 54: In a boiler furnace, flame temperature is maximum when:

Question 55: In a steam engine, hyperbolic expansion indicates that the process is approximately:

Question 56: In a boiler, the function of a blow off cock is to:

Question 57: In a steam engine, the function of flywheel is to:

Question 58: In boiler operation, priming is undesirable because it:

Question 59: In a steam engine, the indicator efficiency is defined as:

Question 60: In boiler accessories, a feed pump is used to:

Question 61: In steam engines, the mechanical efficiency is defined as:

Question 62: In a boiler, the purpose of a manhole is to:

Question 63: In a steam engine, back pressure is reduced by:

Question 64: In boiler efficiency calculation, heat losses mainly occur due to:

Question 65: In a steam engine, volumetric efficiency is affected by:

Question 66: In a boiler, corrosion can be minimized by:

Question 67: In a steam engine, indicated power is calculated using:

Question 68: In boiler operation, foaming is caused due to:

Question 69: In a steam engine, brake power is measured using:

Question 70: In a boiler, natural draught depends mainly on:

Question 71: In a high pressure boiler, the use of an economizer leads to improvement in efficiency primarily because it:

Question 72: In a steam engine, the reheat factor is used to account for:

Question 73: In a boiler, the use of a superheater results in which of the following changes in steam properties?

Question 74: In steam boilers, the purpose of deaeration is to remove dissolved gases because they:

Question 75: In a steam engine, the clearance ratio affects performance mainly by influencing:

Question 76: In a boiler, the function of a pressure gauge is to:

Question 77: In steam engines, the use of multiple expansion stages improves efficiency because:

Question 78: In a boiler furnace, incomplete combustion results in:

Question 79: In a steam engine, mechanical losses are mainly due to:

Question 80: In boiler operation, the main purpose of maintaining proper water level is to:

Question 81: In a steam engine, indicated power differs from brake power due to:

Question 82: In a boiler, scale formation reduces efficiency mainly because it:

Question 83: In a steam engine, the term brake thermal efficiency refers to:

Question 84: In a boiler, natural circulation is driven by:

Question 85: In steam engines, the governor maintains constant speed by controlling:

Question 86: In a boiler, the function of a water level indicator is to:

Question 87: In a steam engine, the efficiency is improved by using a condenser because it:

Question 88: In boiler operation, foaming can be controlled by:

Question 89: In a steam engine, the expansion ratio is defined as:

Question 90: In a boiler, the purpose of lagging is to:

Question 91: In a steam engine, steam consumption is reduced by:

Question 92: In a boiler, blow down should be done periodically to:

Question 93: In a steam engine, power output increases with:

Question 94: In a boiler, the main function of a steam stop valve is to:

Question 95: In a steam engine, efficiency decreases due to:

Question 96: In a boiler, heat loss due to radiation can be reduced by:

Question 97: In a steam engine, the term indicated mean effective pressure is used to:

Question 98: In a boiler, incomplete combustion is indicated by:

Question 99: In a steam engine, increasing expansion ratio leads to:

Question 100: In a boiler, the function of a chimney is to:

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⚙️ 100 Steam Boilers and Steam Engines MCQs with Answers (Mountings, Accessories & Working) – Practice Test

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