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Steam Boilers, Engines, Nozzles And Turbines MCQ Questions & Answers | Mechanical Engineering

Learn Steam Boilers, Engines, Nozzles And Turbines MCQ questions & answers are available for a Mechanical Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Steam Boilers, Engines, Nozzles And Turbines MCQ question is the important chapter for a Mechanical Engineering and GATE students. Page-9 section-4

Each section contains 100 MCQs on Steam Boilers, Engines, Nozzles and Turbines .
81
In a Tandem type compound engine, the high pressure and low pressure cylinders
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Answer & Solution
Answer: Option A
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82
In a receiver type compound engine, the high pressure and low pressure cylinders
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Answer: Option C
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83
In a Woolf type compound engine, the high pressure and low pressure cylinders
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Answer: Option C
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84
The specific volume of steam with increase in pressure decreases
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Answer: Option C
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85
The saturation temperature of steam with increase in pressure increases
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Answer: Option B
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86
The difference of supersaturated temperature and saturation temperature at that pressure is called
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Answer & Solution
Answer: Option C
Solution:
Let's break down the terms:
Saturation Temperature: This is the temperature at which a substance changes phase (e.g., water to steam) at a given pressure.
Supersaturated Temperature: This refers to the actual temperature of the vapor when it is cooled quickly and condensation doesn't happen immediately. It's in a state where it should be condensing, but it hasn't yet.
The difference between these two temperatures is a measure of how much the vapor is "held back" from condensing.
Option A: Degree of super-saturation is the correct answer, since it describes the situation of vapor holding more vapor than in saturated condition.
Option B: Degree of superheat refers to how much a vapor is heated *above* its saturation temperature, which is opposite to what the question describes.
Option C: Degree of under-cooling refers to the temperature difference when a liquid is cooled below its freezing point without solidifying which is irrelevent here.
Therefore, the correct answer is A: Degree of super-saturation
87
The high pressure boiler is one, which produces steam at a pressure more than
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Answer: Option D
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88
Natural water circulation, by convection in water tube boilers, with increase in pressure of boiler
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Answer: Option B
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89
The safety valve on boiler drum compared to safety valve on superheater is set at
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Answer: Option B
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90
The crown of the fire box is made hemispherical in order to
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Answer: Option D
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