Steam Boilers, Engines, Nozzles And Turbines MCQ Questions & Answers

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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-10 section-1

Each section contains 100 MCQs on Steam Boilers, Engines, Nozzles and Turbines .

The maximum efficiency of a reaction turbine is

A) $$\frac{{2{{\sin }^2}\alpha }}{{1 + {{\sin }^2}\alpha }}$$ B) $$\frac{{2{{\cos }^2}\alpha }}{{1 + {{\cos }^2}\alpha }}$$ C) $$\frac{{1 + {{\sin }^2}\alpha }}{{2{{\sin }^2}\alpha }}$$ D) $$\frac{{1 + {{\cos }^2}\alpha }}{{2{{\cos }^2}\alpha }}$$

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

The value of the reheat factor varies from

A) 1.02 to 1.06 B) 1.08 to 1.10 C) 1.2 to 1.6 D) 1.6 to 2

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

The shell of the Cochran boiler is made hemispherical

A) To give maximum space and strength B) To withstand the pressure of steam inside the boiler C) Both (A) and (B) D) None of the above

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

The supersaturated flow of steam through a nozzle as compared to a stable flow, the available heat drop

A) Remains the same B) Increases C) Decreases D) Is unpredictable

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

The overall efficiency of thermal power plant is

A) Boiler efficiency, turbine efficiency, generator efficiency B) All the three above plus gas cycle efficiency C) Carnot cycle efficiency D) Regenerative cycle efficiency

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

Mechanical equivalent of heat for 1 kcal or Joule's equivalent is equal to

A) 421 kg.m B) 451 kg.m C) 539 kg.m D) 102 kg.m

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

The critical pressure ratio for initially wet steam is

A) 0.546 B) 0.577 C) 0.582 D) 0.601

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

The purpose of governing in steam turbines is to

A) Maintain the speed of the turbine B) Reduce the effective heat drop C) Reheat the steam and improve its quality D) Completely balance against end thrust

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

An air preheater

A) Increases evaporative capacity of the boiler B) Increases the efficiency of the boiler C) Enables low grade fuel to be burnt D) All of the above

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

100

Besides mean effective pressure, the data required to determine the indicated power of an engine include

A) Piston diameter, length of stroke and calorific value of fuel B) Piston diameter, specific fuel consumption and Calorific value of fuel C) Piston diameter, length of stroke and speed of rotation D) Specific fuel consumption, speed of rotation and torque

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

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