18601. 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.
Engineering
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18602. 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.
18603. 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.
18604. The centre of buoyancy is the centre of area of the immersed body.
[A]. Correct
[B]. Incorrect
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✅ The correct answer is option A.
18605. Static friction is always __________ dynamic friction.
[A]. equal to
[B]. less than
[C]. greater than
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✅ The correct answer is option C.
18606. 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.
18607. 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.
18608. When a pattern is made in three parts, the bottom part is known as a cope.
[A]. True
[B]. False
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✅ The correct answer is option B.
18609. 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.
18610. Malleable cast iron is produced
[A]. by adding magnesium to molten cast iron
[B]. by quick cooling of molten cast iron
[C]. from white cast iron by annealing process
[D]. none of these
✅ The correct answer is option C.