Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

Mechanical Engineering MCQs prepared for job test and interview preparation, especially for fresh graduates, students, and candidates appearing in competitive exams. These multiple-choice questions cover key topics such as Machine Design, Theory of Machines, Hydraulic Machines, and other important mechanical engineering concepts.

Impulse turbine is generally fitted______________________?

A at the level of tail race

B little above the tail race

C slightly below the tail race

D about 2.5 m above the tail race to avoid cavitation

Review Detailed Answer

Correct Answer: little above the tail race

Francis turbine is best suited for_____________________?

A medium head application from 24 to 180 m

B low head installation up to 30 m

C high head installation above 180 m

D all types of heads

Review Detailed Answer

Correct Answer: medium head application from 24 to 180 m

Francis, Kaplan and propeller turbines fall under the category of___________________?

A Impulse turbines

B Reaction turbines

C Axial flow turbines

D Mixed flow turbines

Review Detailed Answer

Correct Answer: Reaction turbines

The discharge through a reaction turbine with increase in unit speed____________________?

A increases

B decreases

C remains unaffected

D first increases and then decreases

Review Detailed Answer

Correct Answer: decreases

Specific speed for reaction turbines ranges from___________________?

A 0 to 4.5

B 10 to 100

C 80 to 200

D 250 to 300

Review Detailed Answer

Correct Answer: 10 to 100

Which place in hydraulic turbine is most susceptible for cavitation __________________?

A inlet of draft rube

B blade inlet

C guide blade

D penstock

Review Detailed Answer

Correct Answer: inlet of draft rube

According to fan laws, for fans having constant wheel diameter, the air or gas capacity varies______________________?

A directly as fan speed

B square of fan speed

C cube of fan speed

D square root of fan speed

Review Detailed Answer

Correct Answer: directly as fan speed

Saving of work done and power by fitting an air vessel to single acting reciprocating pump is of the order of__________________?

A 39.2%

B 49.2%

C 68.8%

D 84.8%

Review Detailed Answer

Correct Answer: 84.8%

According to fan laws, for fans having constant wheel diameter, the pressure varies________________?

A directly as fan speed

B square of fan speed

C cube of fan speed

D square root of fan speed

Review Detailed Answer

Correct Answer: square of fan speed

Pressure intensifier increases the pressure in proportion to____________________?

A ratio of diameters

B square of ratio of diameters

C inverse ratio of diameters

D square of inverse ratio of diameters

Review Detailed Answer

Correct Answer: ratio of diameters

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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

Impulse turbine is generally fitted______________________?

Francis turbine is best suited for_____________________?

Francis, Kaplan and propeller turbines fall under the category of___________________?

The discharge through a reaction turbine with increase in unit speed____________________?

Specific speed for reaction turbines ranges from___________________?

Which place in hydraulic turbine is most susceptible for cavitation __________________?

According to fan laws, for fans having constant wheel diameter, the air or gas capacity varies______________________?

Saving of work done and power by fitting an air vessel to single acting reciprocating pump is of the order of__________________?

According to fan laws, for fans having constant wheel diameter, the pressure varies________________?

Pressure intensifier increases the pressure in proportion to____________________?