A. Mineral oils
B. Vegetable oils
C. Greases
D. Animal oils
✅ The correct answer is option A.
Basic Chemical Engineering MCQs
Which of the following alloying elements when added in steel does not improve its lachinability?
A. Sulphur
B. Phosphorous
C. Copper
D. Lead
✅ The correct answer is option C.
For the running of power generating turbines, the steam used should be
A. Wet
B. Superheated
C. At ordinary pressure
D. None of these
✅ The correct answer is option B.
Which of the following accounts for maximum loss of energy in a coal fired boiler?
A. Incomplete combustion of fuel
B. Outgoing flue gases
C. Radiation heat losses
D. Unburnt carbon in ash
✅ The correct answer is option B.
Minimum number of members required to form a Public Limited Joint Stock Company is
A. 7
B. 10
C. 12
D. 17
✅ The correct answer is option A.
A semi-conductor is damaged & behaves like a conductor, on passing a strong electric current through it, because it heats up the crystals & breaks the covalant bonds resulting in __________ electrons.
A. Lack of free
B. Excess of
C. Decrease in
D. None of these
✅ The correct answer is option B.
No cutting fluid is normally used, while machining
A. Cast iron
B. Aluminium
C. Mild steel
D. Stainless steel
✅ The correct answer is option A.
Alloy powder manufactured by the following process have spherical shapes.
A. Electrochemical deposition
B. Gaseous reduction
C. Atomisation
D. Mechanical attrition
✅ The correct answer is option C.
Electrochemical corrosion can occur, only if __________ is present in contact with metal.
A. Air
B. Oxygen
C. Liquid medium
D. Gaseous medium
✅ The correct answer is option C.
Current employed in resistance welding ranges from __________ kVA/cm² .
A. 1.2 to 2.5
B. 4.5 to 6.2
C. 7.5 to 8.5
D. 10.5 to 15.5
✅ The correct answer is option B.