external energy
internal energy
kinetic energy
molecular energy
✅ The correct answer is option B.
Mechanical Engineering MCQs
Maximum fluctuation of energy in a flywheel is equal to (where I = Mass moment of inertia of the flywheel, E = Maximum fluctuation of energy, CS = Coefficient of fluctuation of speed, and ω = Mean angular speed = )
Iω(ω1 – ω2)
Iω2CS
2ECS
all of these
✅ The correct answer is option D.
A machine mounted on a single coil spring has a period of free vibration of tp . If the spring is cut into four equal parts and placed in parallel and the machine is mounted on them, then the period of free vibration of the new system will become
tp/16
tp/4
4 tp
16 tp
✅ The correct answer is option B.
Euler’s number is the ratio of __________ force to pressure force.
inertia
gravity
viscous
✅ The correct answer is option A.
When the cross-section of a nozzle __________ continuously from entrance to exit, it is called a convergent nozzle.
increases
decreases
✅ The correct answer is option B.
The distance between the centres of rivets in adjacent rows of zig-zag riveted joint, is called back pitch.
TRUE
FALSE
✅ The correct answer is option B.
A block ot mass 20 kg lying on a rough horizontal plane is connected by a light string passing over a smooth pulley to another mass 5 kg, which can move freely in the Vertical direction, as shown in the below figure. The tension in the string will __________ with the increase in coefficient of friction.
increase
decrease
not be effected
✅ The correct answer is option A.
The flank of the tooth is the
surface of the top of the tooth
surface of the tooth above the pitch surface
surface of the tooth below the pitch surface
width of the tooth mea
✅ The correct answer is option C.
The instantaneous centre of a rigid thin disc rolling on a plane rigid surface is located at
the centre of the disc
the point of contact
an infinite distance on the plane surface
the point on the circu
✅ The correct answer is option B.
Break even analysis consists of
fixed expenses
variable cost
sales revenue
all of these
✅ The correct answer is option D.