Correct
Incorrect
✅ The correct answer is option A.
Mechanical Engineering MCQs
The coefficient of fluctuation of speed is __________ of maximum fluctuation of speed and the mean speed.
sum
difference
product
ratio
✅ The correct answer is option D.
A pipe of length more than double the diameter of orifice fitted externally or internally to the orifice is called a
notch
weir
mouthpiece
nozzle
✅ The correct answer is option C.
The power transmitted by a belt is maximum when the maximum tension in the belt is __________ of centrifugal tension.
one-third
two-third
double
three times
✅ The correct answer is option D.
In a gear having involute teeth, the normal to the involute is a tangent to the
pitch circle
base circle
addendum circle
dedendum circle
✅ The correct answer is option B.
The forced-fed lubrication system means that the oil is delivered to the engine by
gravity
the pressure created by the oil pump
splashing action of the crankshaft
none of these
✅ The correct answer is option B.
The velocity of a body moving with simple harmonic motion is __________ at the mean position.
zero
minimum
maximum
✅ The correct answer is option C.
The temperature produced by oxy-hydrogen flame is about
1800° C
2100° C
2400° C
3200° C
✅ The correct answer is option C.
Plutonium (Pu239) is produced
artificially
by fission of Th232
when U238 is irradiated by neutrons
as basic raw material
✅ The correct answer is option C.
During suction stroke, the inside pressure of cylinder is
more than the atmospheric pressure
less than the atmospheric pressure
equal to the atmospheric pressure
none of these
✅ The correct answer is option B.