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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 index of compression n tends to reach ratio of specific heats y when____________________?

A flow is uniform and steady

B process is isentropic

C process is isothermal

D process is isentropic and specific heat does not change with temperature

Review Detailed Answer

Correct Answer: process is isentropic

The term N.T.P. stands for________________________?

A nominal temperature and pressure

B natural temperature and pressure

C normal temperature and pressure

D normal thermodynamic practice

Review Detailed Answer

Correct Answer: normal temperature and pressure

In an isothermal process, the internal energy of gas molecules________________?

A increases

B decreases

C remains constant

D may increase/decrease depending on the properties of gas

Review Detailed Answer

Correct Answer: remains constant

If a certain amount of dry ice is mixed with same amount of water at 80°C, the final temperature of mixture will be__________________?

A 80°C

B 0°C

C 40°C

D 20°C

Review Detailed Answer

Correct Answer: 0°C

One watt is equal to__________________?

A 1 Nm/s

B 1 N/mt

C 1 Nm/hr

D 1 kNm/hr

Review Detailed Answer

Correct Answer: 1 Nm/s

For which of the following substances, the gas laws can be used with minimum error_________________?

A dry steam

B wet steam

C saturated steam

D superheated steam

Review Detailed Answer

Correct Answer: superheated steam

The value of the product of molecular weight and the gas characteristic constant for all the gases in M.K.S. unit is______________________?

A 29.27 kgfm/mol°K

B 8314kgfm/mol°K

C 848kgfm/mol°K

D 427kgfm/mol°K

Review Detailed Answer

Correct Answer: 848kgfm/mol°K

Universal gas constant is defined as equal to product of the molecular weight of the gas and_______________?

A specific heat at constant pressure

B specific heat at constant volume

C ratio of two specific heats

D gas constant

Review Detailed Answer

Correct Answer: gas constant

For which of the following substances, the internal energy and enthalpy are the functions of temperature only____________________?

A any gas

B saturated steam

C water

D perfect gas

Review Detailed Answer

Correct Answer: perfect gas

If a fluid expands suddenly into vacuum through an orifice of large dimension, then such a process is called___________________?

A free expansion

B hyperbolic expansion

C adiabatic expansion

D parabolic expansion

Review Detailed Answer

Correct Answer: free expansion

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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

The index of compression n tends to reach ratio of specific heats y when____________________?

The term N.T.P. stands for________________________?

In an isothermal process, the internal energy of gas molecules________________?

If a certain amount of dry ice is mixed with same amount of water at 80°C, the final temperature of mixture will be__________________?

One watt is equal to__________________?

For which of the following substances, the gas laws can be used with minimum error_________________?

The value of the product of molecular weight and the gas characteristic constant for all the gases in M.K.S. unit is______________________?

Universal gas constant is defined as equal to product of the molecular weight of the gas and_______________?

For which of the following substances, the internal energy and enthalpy are the functions of temperature only____________________?

If a fluid expands suddenly into vacuum through an orifice of large dimension, then such a process is called___________________?