streamline flow
turbulent flow
steady flow
unsteady flow
✅ The correct answer is option D.
Mechanical Engineering MCQs
The property of a working substance which increases or decreases as the heat is supplied or removed in a reversible manner, is known as
enthalpy
internal energy
entropy
external energy
✅ The correct answer is option C.
The factor considered for evaluation of machinability is
cutting forces and power consumption
tool life
type of chips and shear angle
all of these
✅ The correct answer is option D.
Coplaner non-concurrent forces are those forces which __________ at one point, but their lines of action lie on the same plane.
meet
do not meet
✅ The correct answer is option B.
The effect of swaying couple in a locomotive is resisted by the side pressure between the flanges of the tyres of the wheel and the inside of the rails.
Agree
Disagree
✅ The correct answer is option A.
The operating temperature of a cold storage is – 2° C. The heat leakage from the surrounding is 30 kW for the ambient temperature of 40° C. The actual C.O.P. of refrigeration plant used is one fourth that of ideal plant working between the same temperatures. The power required to drive the plant is
1.86 kW
3.72 kW
7.44 kW
18.6 kW
✅ The correct answer is option D.
The maximum acceleration of a particle moving with simple harmonic motion is
ω
ωr
ω2r
ω/r
✅ The correct answer is option C.
In time study, normal time is more than the standard time.
Yes
No
✅ The correct answer is option B.
The coefficient of performance (C.O.P.) is the reciprocal of the efficiency of a heat engine.
TRUE
FALSE
✅ The correct answer is option A.