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.

Water at pressure of 4 kg/cm2 and 160°C temperature when exposed to atmosphere will_________________?

A boil

B flash i.e. get converted into steam

C remain as it was

D cool down

Review Detailed Answer

Correct Answer: flash i.e. get converted into steam

In a throttling process________________?

A steam temperature remaisn constant

B steam pressure remains constant

C steam enthalpy remains constant

D steam entropy remains constant

Review Detailed Answer

Correct Answer: steam enthalpy remains constant

The latent heat of steam with increase of pressure__________________?

A remains same

B increases

C decreases

D behaves unpredictably

Review Detailed Answer

Correct Answer: decreases

At which pressure the properties of water and steam become identical_________________?

A 0.1 kg/cm2

B 1 kg/cm2

C 100 kg/cm2

D 225.6 kg/cm2

Review Detailed Answer

Correct Answer: 225.6 kg/cm2

While steam expands in turbines, theoretically the entropy________________?

A remains constant

B increases

C decreases

D behaves unpredictably

Review Detailed Answer

Correct Answer: remains constant

Adiabatic process is________________?

A essentially an isentropic process

B non-heat transfer process

C reversible process

D constant temperature process

Review Detailed Answer

Correct Answer: non-heat transfer process

Pick up the wrong statement about critical condition of steam___________________?

A latent heat is zero

B liquid directly becomes steam

C specific volume of steam and liquid is same

D this is the maximum pressure limit

Review Detailed Answer

Correct Answer: this is the maximum pressure limit

Mechanical equivalent of heat for 1 kcal or Joule’s equivalent is equal to_________________?

A 421 kgm

B 421 kgm

C 539 kgm

D 102 kgm

Review Detailed Answer

Correct Answer: 421 kgm

The evaporation of 15.653 kg of water per hour from and at 100°C is called_________________?

A evaporative capacity

B factor of evaporation

C equivalent evaporation

D one boiler h.p.

Review Detailed Answer

Correct Answer: one boiler h.p.

During polytropic process_________________?

A heat transfer takes place across cylinder walls

B work is done

C steam may be wet, dry or superheated after expansion

D all of the above

Review Detailed Answer

Correct Answer: all of the above

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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

Water at pressure of 4 kg/cm2 and 160°C temperature when exposed to atmosphere will_________________?

In a throttling process________________?

The latent heat of steam with increase of pressure__________________?

At which pressure the properties of water and steam become identical_________________?

While steam expands in turbines, theoretically the entropy________________?

Adiabatic process is________________?

Pick up the wrong statement about critical condition of steam___________________?

Mechanical equivalent of heat for 1 kcal or Joule’s equivalent is equal to_________________?

The evaporation of 15.653 kg of water per hour from and at 100°C is called_________________?

During polytropic process_________________?