A. Spark
B. Hot compressed air
C. Fuel injection
D. None of these
✅ The correct answer is option B.
Basic Chemical Engineering MCQs
Which of the following phenomenon will exhibit the minimum heat transfer?
A. Boiling
B. Forced convection in air
C. Free convection in air
D. Conduction in air
✅ The correct answer is option D.
The amount of water evaporated in kg per kg of fuel burnt in a boiler is called the __________ of a boiler.
A. Evaporative capacity
B. Evaporation efficiency
C. Thermal efficiency
D. Steam load
✅ The correct answer is option A.
‘GASOHOL’ widely used in Brazil as a motor fuel is a mixture of alcohol and
A. Petrol
B. LPG
C. Light hydrocarbon gases (e.g. butane or propane)
D. None of these
✅ The correct answer is option A.
In “Imperial Smelting Process” for extraction of zinc, zinc vapour thus produced is quenched in the external condenser by the use of the following :
A. Jet of water at high pressure
B. Blast of air
C. Mixture of water and air
D. Rain of molten lead
✅ The correct answer is option D.
Electrolytes conduct electric current by
A. The movement of ions
B. The movement of molecules
C. Allowing electrons to flow through them from cathode to anode
D. Movement of electric charge through them
✅ The correct answer is option A.
Metallic surveying tapes are made of __________ which has a low co-efficient of expansion & enough strength.
A. Invar
B. Hastealloy
C. Duralumin
D. Monel metal
✅ The correct answer is option A.
Gratings is associated with the measurement of
A. Linear displacement
B. Concavity/convexity
C. Surface texture
D. Flatness
✅ The correct answer is option A.
Filler material used in welding having the lowest melting point out of the following is
A. Aluminium
B. Soft solder
C. Silver solder
D. Brazing spelter
✅ The correct answer is option B.
The atmospheric temperature during melting of ice/snow (in the atmosphere)
A. Decreases
B. Increases
C. Remains same
D. May increase or decrease ; depends on the altitude where snow melts
✅ The correct answer is option A.