ω(r1 – r2)sin θ
ω(r1 + r2)sinθ sec2θ
ω(r1 – r2)cos θ
ω(r1 + r2)cos θ cosec2
✅ The correct answer is option B.
Mechanical Engineering MCQs
When a shaft is subjected to combined twisting moment (T) and bending moment (M), then the equivalent twisting moment is equal to
✅ The correct answer is option B.
Which of the following statements are true for annealing of steels?
Steels are heated to 500 to 700° C
Cooling is done slowly and steadily
Internal stresses are relieved
all of these
✅ The correct answer is option D.
By decreasing the highest temperature in the Carnot cycle, its efficiency is increased.
TRUE
FALSE
✅ The correct answer is option B.
Carnot cycle has maximum efficiency for
petrol engine
diesel engine
reversible engine
irreversible engine
✅ The correct answer is option C.
Clutch facings are usually attached to the plate by
steel rivets
brass rivets
aluminium screws
steel screws
✅ The correct answer is option B.
The cooling of air, without any change in its specific humidity, is known as sensible cooling.
Correct
Incorrect
✅ The correct answer is option A.
The tool life in case of a grinding wheel is the time
between two successive regrinds of the wheel
taken for the wheel to be balanced
taken between two successive wheel dressings
taken for a wear of 1
✅ The correct answer is option C.
In low carbon steels, presence of small quantities of sulphur improves
weldability
formability
machinability
hardenability
✅ The correct answer is option C.