all of these
✅ The correct answer is option D.
Mechanical Engineering MCQs
When a steel containing less than 0.8% carbon is cooled slowly from temperatures above or within the critical range, it consists of
mainly ferrite
mainly pearlite
ferrite and pearlite
pearlite and cementite
✅ The correct answer is option C.
The effect of key ways on a shaft is to reduce its load carrying capacity and to increase its torsional rigidity.
TRUE
FALSE
✅ The correct answer is option B.
A Francis turbine is an outward flow reaction turbine.
TRUE
FALSE
✅ The correct answer is option B.
The temperature of air recorded by a thermometer, when it is not effected by the moisture present in the air, is called
wet bulb temperature
dry bulb temperature
dew point temperature
none of these
✅ The correct answer is option B.
When the belt is stationary, it is subjected to some tension known as initial tension. The value of this tension is equal to the
tension in the tight side of the belt
tension in the slack side of the belt
sum of the tensions on the tight side and slack side of the belt
average tension of the
✅ The correct answer is option D.
In drilling bakellite and fibrous plastics, the point angle of a drill is
90°
118°
135°
150°
✅ The correct answer is option A.
Reversed Joule cycle is known as
Carnot cycle
Bell-Coleman cycle
Rankine cycle
Stirling cycle
✅ The correct answer is option B.
A pair is said to be a kinematic pair, if the relative motion between them is completely or successfully constrained.
Correct
Incorrect
✅ The correct answer is option A.
When a bar is subjected to a change of temperature and its deformation is prevented, the stress induced in the bar is
tensile stress
compressive stress
shear stress
thermal stress
✅ The correct answer is option D.