Mechanical Engineering Archives

5301. 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.

5302. 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.

5303. 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.

5304. 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.

5305. 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.

5306. When cut-off ratio is __________ the efficiency of Diesel cycle approaches to Otto cycle efficiency.

[A]. zero

[B]. 1/5

[C]. 4/5

[D]. 1

✅ The correct answer is option A.

5307. A fixture does not guide the tool.

[A]. Correct

[B]. Incorrect

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✅ The correct answer is option A.

5308. The pair is known as a higher pair, when the relative motion between the elements of a pair is

[A]. turning only

[B]. sliding only

[C]. rolling only

[D]. partly turning and partly sliding

✅ The correct answer is option D.

5309. The property of a material due to which it breaks with little permanent distortion, is called

[A]. brittleness

[B]. ductility

[C]. malleability

[D]. plasticity

✅ The correct answer is option A.

5310. When a bar is cooled to – 5°C, it will develop

[A]. no stress

[B]. shear stress

[C]. tensile stress

[D]. compressive stress

✅ The correct answer is option C.