Mechanical Engineering MCQs

According to parallel axis theorem, the moment of inertia of a section about an axis parallel to the axis through centre of gravity (i.e. IP) is given by(where, A = Area of the section, IG = Moment of inertia of the section about an axis passing through its C.G., and h = Distance between C.G. and the parallel axis.)

by
IP = IG + Ah2
IP = IG – Ah2
IP = IG / Ah2
IP = Ah2 / IG
✅ The correct answer is option A.

The advantage of having a tandem master cylinder arrangement in automobiles is that it

by
enhances safety by serving two independent lines in a divided-line brake circuit
enhances safety by activating the brakes using vacuum pressure in the event of brake fluid loss
supplies equal fluid pressure to each line of a divided-line brake circuit, thereby preventing the brakes from dragging on one side
boosts the brake fluid
✅ The correct answer is option A.

Which one of the following statements correctly describes the construction of a planetary gear type differential ?

by
The six planetary pinions rotate in constant mesh with the internal gears.
One drive shaft is splined to the central gear and the other to the planetary gear.
Each planetary pinion gear meshes with both the central gear and the internal gear.
The internal gear is f
✅ The correct answer is option B.

The flow in a pipe or channel is said to be uniform when

by
the liquid particles at all sectons have the same velocities
the liquid particles at different sections have different velocities
the quantity of liquid flowing per second is constant
each liquid particle h
✅ The correct answer is option A.