TRUE
FALSE
✅ The correct answer is option B.
Mechanical Engineering MCQs
Which of the following material has nearly zero coefficient of expansion?
Stainless steel
High speed steel
Invar
Heat resisting steel
✅ The correct answer is option C.
The reading of the pressure gauge fitted on a vessel is 25 bar. The atmospheric pressure is 1.03 bar and the value of ‘g’ is 9.81 m/s2. The absolute pressure in the vessel is
23.97 bar
25 bar
26.03 bar
34.81 bar
✅ The correct answer is option C.
The intensity of pressure at any point, in a liquid, is __________ to the depth of liquid from the surface.
equal
directly proportional
inversely proportional
✅ The correct answer is option B.
When the addenda on pinion and wheel is such that the path of approach and path of recess are half of their maximum possible values, then the length of the path of contact is given by (where r = Pitch circle radius of pinion, R = Pitch circle radius of wheel, and φ = Pressure angle)
✅ The correct answer is option D.
In the levers of third type, the mechanical advantage is __________ one.
less than
equal to
more than
✅ The correct answer is option A.
When the speed of the engine fluctuates continuously above and below the mean speed, the governor is said to be
stable
unstable
isochronous
hunt
✅ The correct answer is option D.
The total number of instantaneous centres for a mechanism consisting of n links are
n/2
n
n – 1
n(n – 1)/2
✅ The correct answer is option D.
A human body feels comfortable when the heat produced by the metabolism of human body is equal to the
heat dissipated to the surroundings
heat stored in the human body
sum of (a) and (b)
difference of (a) and
✅ The correct answer is option C.
In a single threaded worm and worm wheel, the number of teeth on the worm is 50. The diameter of the effort wheel is 100 mm and that of load drum is 50 mm. The velocity ratio is
50
100
150
200
✅ The correct answer is option B.