A. If the ratio of the delivery pressure to the intake pressure exceeds 5:1
B. When large amount of gas is to be compressed
C. When the delivered gas is desired at very high velocity
D. None of these
✅ The correct answer is option A.
Engineering MCQs
The fugacity of liquid water at 298 K is approximately 3171 Pa. Considering the ideal heat of vaporisation as 43723 J/gm mole, its fugacity at 300 K would be
A. 3171Pa
B. 3567Pa
C. 1.01 x 10⁵Pa
D. 5000Pa
✅ The correct answer is option B.
Wavelength of radiation emitted by a body depends on the __________ of its surface.
A. Temperature
B. Area
C. Nature
D. All of the above
✅ The correct answer is option A.
Which of the following pair is correctly matched?
A. Heat transfer: Thermal diffusivity
B. Mass transfer: Diffusion co-efficient
C. Momentum transfer: Kinematic viscosity
D. All of the above
✅ The correct answer is option D.
As per international norms, the maximum permissible value of noise level in the industrial environment is __________ decibels as measured at a distance of 1.5 metres from the source of noise.
A. 110
B. 85
C. 60
D. 45
✅ The correct answer is option B.
Corrosion of metals can not be prevented by its
A. Tempering
B. Chromising
C. Aluminising
D. Alloying
✅ The correct answer is option A.
The laminar boundary layer thickness in zero pressure gradient flow over a flat plate along the x-direction varies as x0.5 while the thickness of turbulent boundary layer varies as (where, x = distance from the leading edge)
A. X1.5
B. X0.8
C. X-1.5
D. X-0.8
✅ The correct answer is option B.
Current asset of a factory includes the
A. Goodwill of the company
B. Common stocks held by the company
C. Manufacturing plant & equipment
D. Inventory
✅ The correct answer is option C.
Fatigue strength of a metal is improved by
A. Overstressing
B. Scratching the surface
C. Raising the temperature
D. Understressing
✅ The correct answer is option D.
Minimum safe distance between two liquid fuel storage tanks is equal to (where, H = height of the tank)
A. H
B. H/2
C. H/4
D. H/6
✅ The correct answer is option D.