5291. In a four stroke cycle petrol engine, the charge is compressed when both the valves (i.e. inlet valve and exit valve) are closed,
[A]. Agree
[B]. Disagree
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✅ The correct answer is option A.
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.
5292. The simply supported beam ‘A’ of length l carries a central point load W. Another beam ‘B’ is loaded with a uniformly distributed load such that the total load on the beam is W. The ratio of maximum deflections between beams A and B is
[A]. 5/8
[B]. 8/5
[C]. 5/4
[D]. 4/5
✅ The correct answer is option B.
5293. A shaft has an attached disc at the centre of its length. The disc has its centre of gravity located at a distance of 2 mm from the axis of the shaft. When the shaft is allowed to vibrate in its natural bow-shaped mode, it has a frequency of vibration of 10 rad/s. When the shaft is rotated at 300 r.p.m., it will whirl with a radius of
[A]. 2 mm
[B]. 2.22 mm
[C]. 2.50 mm
[D]. 3.0 mm
✅ The correct answer is option B.
5294. The centre of buoyancy is the centre of area of the immersed body.
[A]. Correct
[B]. Incorrect
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null
✅ The correct answer is option A.
5295. Static friction is always __________ dynamic friction.
[A]. equal to
[B]. less than
[C]. greater than
null
✅ The correct answer is option C.
5296. Thermal diffusivity is a
[A]. function of temperature
[B]. physical property of a substance
[C]. dimensionless parameter
[D]. all of these
✅ The correct answer is option B.
5297. The draft or taper allowance on casting is generally
[A]. 1 to 2 mm/m
[B]. 2 to 5 mm/m
[C]. 5 to 10 mm/m
[D]. 10 to 15 mm/m
✅ The correct answer is option A.
5298. When a pattern is made in three parts, the bottom part is known as a cope.
[A]. True
[B]. False
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null
✅ The correct answer is option B.
5299. Which of the following statement is incorrect with reference of lathe cutting tools?
[A]. The flank of the tool is the surface or surfaces below and adjacent to the cutting edges
[B]. The nose is the corner, arc or chamfer joining the side cutting and the end cutting edges
[C]. The heel is that part of the tool which is shaped to produce the cutting edges and face
[D]. The base is that surface of the shank which bears against the support and takes tangent pressure of the cut
✅ The correct answer is option C.
5300. The supersaturated flow of steam through a nozzle as compared to a stable flow, the available heat drop
[A]. remains the same
[B]. increases
[C]. decreases
[D]. is unpredictable
✅ The correct answer is option C.