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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.

The dry saturated steam at very high pressure (150-200 kg/cm2) when throttled to atmosphere will become_______________?

A wet

B superheated

C remain dry saturated

D dry

Review Detailed Answer

Correct Answer: wet

The dry saturated steam at very low pressure, (5-10 kg/cm2) when throttled to atmosphere will become________________?

A wet

B superheated

C remain dry satruated

D dry

Review Detailed Answer

Correct Answer: superheated

On Mollier chart, free expansion, or throttling process from high pressure to atmosphere is represented by_______________?

A horizontal straight line

B vertical straight line

C straight inclined line

D curved line

Review Detailed Answer

Correct Answer: horizontal straight line

The specific heat of superheated steam in kcal/kg is generally of the order of___________________?

A 0.1

B 0.3

C 0.5

D 0.8

Review Detailed Answer

Correct Answer: 0.5

One kg of steam sample contains 0.8 kg dry steam; it’s dryness fraction is__________________?

A 0.2

B 0.8

C 1.0

D 0.6

Review Detailed Answer

Correct Answer: 0.8

Sublimation region is the region where__________________?

A solid and vapour phases are in equi-librium

B solid and liquid phases are in equilibrium

C liquid and vapour phases are in equilibrium

D solid, liquid and vapour phases are in equilibrium

Review Detailed Answer

Correct Answer: solid and vapour phases are in equi-librium

Equivalent evaporation is the amount of water evaporated in a boiler from and at ____________________?

A 0°C

B 100°C

C saturation temperature at given pressure

D room temperature

Review Detailed Answer

Correct Answer: 0°C

1 kg.m is equal to_________________?

A 9.81 Joules

B All Joules

C 427 Joules

D 102 Joules

Review Detailed Answer

Correct Answer: 9.81 Joules

Coke is produced by__________________?

A pulverising coal in inert atmosphere

B heating wood in a limited supply of air at temperatures below 300GC

C strongly heating coal continuously for about 48 hours in the absence of air in a closed vessel

D binding the pulverised coal into brick-etts

Review Detailed Answer

Correct Answer: strongly heating coal continuously for about 48 hours in the absence of air in a closed vessel

The critical pressure at which latent heat of vaporisation is zero is________________?

A 225.65 kgf/cm2

B 273 kgf/cm2

C 100 kgf/cm2

D 1 kgf/cm2

Review Detailed Answer

Correct Answer: 225.65 kgf/cm2

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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

The dry saturated steam at very high pressure (150-200 kg/cm2) when throttled to atmosphere will become_______________?

The dry saturated steam at very low pressure, (5-10 kg/cm2) when throttled to atmosphere will become________________?

On Mollier chart, free expansion, or throttling process from high pressure to atmosphere is represented by_______________?

The specific heat of superheated steam in kcal/kg is generally of the order of___________________?

One kg of steam sample contains 0.8 kg dry steam; it’s dryness fraction is__________________?

Sublimation region is the region where__________________?

Equivalent evaporation is the amount of water evaporated in a boiler from and at ____________________?

1 kg.m is equal to_________________?

Coke is produced by__________________?

The critical pressure at which latent heat of vaporisation is zero is________________?