A. Forging
B. Swaging
C. Extrusion
D. Machining
✅ The correct answer is option B.
Basic Chemical Engineering MCQs
Frother is added in the froth floatation cell used in ore beneficiation to stabilise the air bubbles (i.e., froth), which will hold the ore particles, but it does not affect the floatability of minerals. Which of the following is not used as a frother?
A. Cresylic acid
B. Xanthaies
C. Pine oil
D. All of the above
✅ The correct answer is option B.
Fire refining process is employed in case of
A. Tin
B. Copper
C. Zinc
D. Aluminium
✅ The correct answer is option B.
Stellite is a __________ material.
A. Ferrous
B. Ceramic
C. Cemented carbide
D. Non ferrous cast alloy cutting tool
✅ The correct answer is option D.
With decrease in the grain size of a material, its creep resistance
A. Increases
B. Decreases
C. Remains constant
D. Either A or B ; depends on the material
✅ The correct answer is option C.
Multistage compression is necessary for high efficiency,
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.
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.