reversed Carnot cycle
reversed Otto cycle
reversed Joule cycle
reversed Rankine cycle
✅ The correct answer is option C.
Mechanical Engineering MCQs
The Newton’s law of resistance is based on the assumption that the
planes of the body are completely smooth
space around the body is completely filled with the fluid
fluid particles do not exert any influence on one another
all of the above
✅ The correct answer is option D.
The purpose of a balancer shaft is to
balance the timing in the movement of the two groups of pistons
increase inertia force of the rotating crankshaft
reduce vibrations caused by the crankshaft rotation
adjust the timing of t
✅ The correct answer is option C.
A chain drive transmits __________ power as compared to belt drive.
more
less
✅ The correct answer is option A.
A slender shaft supported on two bearings at its ends carries a disc with an eccentricity e from the axis of rotation. The critical speed of the shaft is Nc. If the disc is replaced by a second one of same mass but mounted with an eccentricily 2 e, then the critical speed of the shaft in the second case is
Nc/2
Nc/2
Nc
2 Nc
✅ The correct answer is option A.
The rate of doing work is known as
potential energy
kinetic energy
power
none of these
✅ The correct answer is option C.
A compound steam engine in which piston rods of high pressure and low pressure cylinders ‘ are attached to two different cranks set at 180° to each other, is called
receiver type compound engine
Tandem type compound engine
Woolf type compound engine
both (a) and (b)
✅ The correct answer is option C.
A beam of uniform strength has
same cross-section throughout the beam
same bending stress at every section
same bending moment at every section
same shear stress at e
✅ The correct answer is option B.
In permanent mould casting method
molten metal is poured in a metallic mould, retained in the mould long enough for the outer skin to solidify and finally mould is turned over to remove molten metal still in molten condition
molten metal is poured and allowed to solidify while the mould is revolving
molten metal is forced into mould under high pressure
none of the above
✅ The correct answer is option D.
The frictional torque transmitted in a flat collar bearing, considering uniform wear, is (where r1 and r2 = External and internal radii of collar respectively)
μ W (r1 + r2)
μ W (r1 + r2)
✅ The correct answer is option A.