Mechanical Engineering

Prepare with the best Mechanical Engineering MCQs with answers and explanations for exams, interviews, and job tests. Our collection covers core topics such as engineering mechanics, thermodynamics, strength of materials, theory of machines, fluid mechanics, heat transfer, manufacturing processes, machine design, and power plant engineering. These Mechanical Engineering multiple-choice questions are designed for students, fresh graduates, and professionals preparing for NTS, PPSC, FPSC, PEC exams, GATE, university entry tests, and recruitment assessments. Strengthen your technical knowledge and problem-solving ability with our updated and comprehensive Mechanical Engineering MCQs.

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4945. Fire tube boilers are

internally fired
externally fired
internally as well as externally fired
none of these
✅ The correct answer is option A.

4946. The blank diameter used in thread rolling will be

equal to minor diameter of the thread
equal to pitch diameter of the thread
a little larger than the minor diameter of the thread
a little larger than the pitch diameter of the thread
✅ The correct answer is option C.

4950. Which of the following statement is wrong ?

The factor of evaporation for all boilers is always greater than unity.
The amount of water evaporated in kg per kg of fuel burnt is called equivalent evaporation from and at 100° C.
The ratio of heat actually used in producing the steam to the heat liberated in the furnace is called boiler efficiency.
none of the above
✅ The correct answer is option D.
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