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.

Runaway speed of a hydraulic turbine is_________________?

A full load speed

B the speed at which turbine runner will be damaged

C the speed if the turbine runner is allowed to revolve freely without load and with the wicket gates wide open

D the speed corresponding to maximum overload permissible

Review Detailed Answer

Correct Answer: the speed if the turbine runner is allowed to revolve freely without load and with the wicket gates wide open

Medium specific speea of turbine implies it is___________________?

A propeller turbine

B Francis turbine

C impulse turbine

D any one of the above

Review Detailed Answer

Correct Answer: Francis turbine

The specific speed of turbine is defined as the speed of a unit___________________?

A of such a size that it delivers unit dis-charge at unit head

B of such a size that it delivers unit dis-charge at unit power

C of such a size that it requires unit power per unit head

D of such a size that it produces unit horse power with unit head

Review Detailed Answer

Correct Answer: of such a size that it produces unit horse power with unit head

A turbine pump is basically a centrifugal pump equipped additionally with_________________?

A adjustable blades

B backward curved blades

C vaned diffusion casing

D inlet guide blades

Review Detailed Answer

Correct Answer: vaned diffusion casing

In reaction turbine, draft tube is used_____________________?

A to transport water downstream without eddies

B to convert the kinetic energy to flow energy by a gradual expansion of the flow cross-section

C for safety of turbine

D to increase flow rate

Review Detailed Answer

Correct Answer: to convert the kinetic energy to flow energy by a gradual expansion of the flow cross-section

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

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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

Runaway speed of a hydraulic turbine is_________________?

Medium specific speea of turbine implies it is___________________?

The specific speed of turbine is defined as the speed of a unit___________________?

A turbine pump is basically a centrifugal pump equipped additionally with_________________?

In reaction turbine, draft tube is used_____________________?

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___________________?