A. Same
B. Slightly less
C. Slightly more
D. Much more
✅ The correct answer is option C.
Basic Chemical Engineering MCQs
The pressure drop per unit length for laminar flow of fluid through a long pipe is proportional to (where, A = cross-sectional area of the pipe & D = Diameter of the pipe)
A. A
B. D
C. 1/A
D. 1/A²
✅ The correct answer is option C.
Welded joint is superior to revetted joint in respect of ease of fabrication, weight and strength. Which of the following joints is the most suitable for pipes carrying fluids under high pressure and temperature?
A. Flanged joint
B. Expansion joint
C. Bell and spigot joint
D. None of these
✅ The correct answer is option B.
All of the following alloying elements of steel increases hardness but sacrifice ductility, except
A. Nickel
B. Vanadium
C. Molybdenum
D. Chromium
✅ The correct answer is option A.
The temperature at which the magnetic property of iron disappears (i.e., it becomes non-magnetic) and its electrical conductivity & specific heat also changes, is called the ‘Curie point’, which is __________ °C.
A. 768
B. 908
C. 1400
D. 1539
✅ The correct answer is option A.
Which of the following is normally not found in both the S.I. (petrol) & C.I. (diesel) engines?
A. Air filter
B. Fuel injector
C. Exhaust silencer
D. Battery
✅ The correct answer is option B.
Which of the following mainly decides the current to be employed is arc welding?
A. Electrode size
B. Plate thickness
C. Voltage across the arc
D. Welded portion length
✅ The correct answer is option A.
Which of the following is not a natural abrasive?
A. Silicon carbide
B. Quartz
C. Corundum
D. Emery
✅ The correct answer is option A.
Expansion device used in a window air-conditioner is a/an
A. Automatic expansion valve
B. Thermostatic expansion valve
C. Float valve
D. Capillary tube
✅ The correct answer is option D.
Freezing of 35% oleum during its shipment in winter is avoided by the addition of small amount of
A. Hydrochloric acid
B. Methyl alcohol
C. Formic acid
D. Nitric acid
✅ The correct answer is option D.