Yes
No
✅ The correct answer is option A.
Mechanical Engineering MCQs
According to Newton’s law of viscosity, the shear stress on a layer of a fluid is __________ to the rate of shear strain.
equal to
directly proportional
inversely proportional
✅ The correct answer is option B.
In drilling softer materials, the cutting speed is __________ as compared to harder materials.
same
low
high
✅ The correct answer is option C.
A body is subjected to a direct tensile stress of 300 MPa in one plane accompanied by a simple shear stress of 200 MPa. The maximum shear stress will be
-100 MPa
250 MPa
300 MPa
400 MPa
✅ The correct answer is option B.
The lead angle of a worm is 22.5°. Its helix angle will be
22.5°
45°
67.5°
90°
✅ The correct answer is option C.
The product of Young’s modulus (E) and moment of inertia (I) is known as
modulus of rigidity
bulk modulus
flexural rigidity
torsional rigidity
✅ The correct answer is option C.
The lead screw of a lathe with nut forms a
rolling pair
sliding pair
screw pair
turning pair
✅ The correct answer is option C.
The chamfering is an essential operation after
knurling
rough turning
boring
thread cutting
✅ The correct answer is option D.
A channel is said to be of most economical cross-section, if
it gives maximum discharge for a given cross-sectional area and bed slope
it has minimum wetted perimeter
it involves lesser excavation for the designed amount of discharge
all of the above
✅ The correct answer is option D.
During gas charging in an ammonia vapour compression system, the connection is made at the compressor outlet.
Agree
Disagree
✅ The correct answer is option A.