TRUE
FALSE
✅ The correct answer is option A.
Mechanical Engineering MCQs
The atmospheric pressure at sea level is
103 kN/m2
10.3 m of water
760 mm of mercury
all of these
✅ The correct answer is option D.
In the below figure, the point C represents
elastic limit
upper yield point
lower yield point
breaking point
✅ The correct answer is option C.
The blade friction in the impulse turbine reduces the velocity of steam by __________ while it passes over the blades.
10 to 15%
15 to 20%
20 to 30%
30 to 40%
✅ The correct answer is option A.
For gas welding, the presure desired at the welding torch for acetylene is
7 to 103 kN/m2
70 to 280 kN/m2
280 to 560 kN/m2
560 to 840 kN/m2
✅ The correct answer is option A.
In open cycle turbo-jet engines used in military aircraft, reheating the exhaust gas from the turbine by burning, more fuel is used to increase the
thrust and range of aircraft
efficiency of the engine
both (a) and (b)
none of these
✅ The correct answer is option A.
The maximum efficiency of a screw jack is
✅ The correct answer is option A.
The displacement of the D-slide valve is __________ the steam lap by a distance known as lead of the valve.
greater than
less than
✅ The correct answer is option A.
The total pressure on an immersed surface inclined at an angle θ with the liquid surface is
wA
wx
wAx
wAx/sin θ
✅ The correct answer is option C.
The function of an oil control orifice is that it
returns cylinder head lubricating oil to the oil pan at high speed
turns oil into fine mist for spray lubrication
regulates the pressure of engine oil supplied by the oil pump for the lubrication of cylinder head mechanism and other purposes
removes impurities fro
✅ The correct answer is option C.