dry bulb temperature
wet bulb temperature
dew point temperature
relative humidity
✅ The correct answer is option D.
Mechanical Engineering MCQs
A simple spring-mass vibrating system has a natural frequency of fn. If the spring stiffness is halved and the mass is doubled, then the natural frequency will become
fn/2
2 fn
4 fn
8 fn
✅ The correct answer is option A.
According to I.B.R., when the thickness of boiler shell (t) is greater than 8 mm, then the diameter of rivet hole (d) is obtained by
equating tearing resistance of the plate to the shearing resistance of the rivets
equating tearing resistance of the plate to the crushing resistance of the rivets
equating shearing resistance to the crushing resistance of the rivets
none of the above
✅ The correct answer is option D.
Most of the engines, generally, do not require balancing of secondary forces and couples.
Right
Wrong
✅ The correct answer is option A.
If the Francis turbine is run below 50 percent head for a long period, it will not only lose its efficiency but also the cavitation danger will become more serious.
Agree
Disagree
✅ The correct answer is option A.
The ratio of maximum fluctuation of speed to the mean speed is called
fluctuation of speed
maximum fluctuation of speed
coefficient of fluctuation of speed
none of these
✅ The correct answer is option C.
Whenever a plate is held immersed at some angle with the direction of flow of the liquid, it is subjected to some pressure. The component of this pressure, in the direction of flow of the liquid, is known as
lift
drag
stagnation pressure
bulk modulus
✅ The correct answer is option B.
Steel containing 0.8 to 1.5% carbon, is known as
mild steel
dead mild steel
medium carbon steel
high carbon steel
✅ The correct answer is option D.
White cast iron has
carbon in the form of carbide
low tensile strength
high compressive strength
all of these
✅ The correct answer is option D.
Curtis turbine is a
simple reaction turbine
velocity compounded turbine
pressure compounded turbine
pressure-velocity comp
✅ The correct answer is option D.