[A]. turning only
[B]. sliding only
[C]. rolling only
[D]. partly turning and partly sliding
✅ The correct answer is option D.
Mechanical Engineering MCQs
The chisel used for cutting key ways is
[A]. flat chisel
[B]. cape chisel
[C]. round nose chisel
[D]. diamond pointed chisel
✅ The correct answer is option B.
In a four high rolling mill, there are four rolls out of which
[A]. one is working roll and three are backing up rolls
[B]. two are working rolls and two are backing up rolls
[C]. three are working rolls and one is backing up roll
[D]. all of the four are working rolls
✅ The correct answer is option B.
In a unit type body (frameless body) design, the sheet metal parts are welded together, forming a frame work to which outer skin is attached.
[A]. True
[B]. False
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✅ The correct answer is option A.
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.
Which of the following statement is incorrect?
[A]. The liquid fuels consist of hydrocarbons.
[B]. The liquid fuels have higher calorific value than solid fuels.
[C]. The solid fuels have higher calorific value than liquid fuels.
[D]. A good fuel should have low ignition point.
✅ The correct answer is option C.
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.
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.
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.
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.