A. Bolt
B. Stud
C. Top bolt
D. None of these
✅ The correct answer is option B.
Chemical Engineering MCQs
Gas turbine normally employs a constant __________ cycle.
A. Pressure
B. Temperature
C. Volume
D. None of these
✅ The correct answer is option A.
Magnetic permeability of iron is increased by its
A. Decarburising
B. Alloying with cobalt
C. Purification
D. Alternate heating & cooling
✅ The correct answer is option B.
A coal with high __________ content will ignite most easily.
A. Hydrogen
B. Oxygen
C. Volatile matter
D. Fixed carbon
✅ The correct answer is option C.
Heat treatment of steel is done to mainly change its __________ properties.
A. Physical
B. Chemical
C. Mechanical
D. Surface
✅ The correct answer is option C.
The thermodynamic law, PVy = constant, is not followed by the
A. Free expansion of an ideal gas
B. Adiabatic expansion of steam in turbine
C. Adiabatic compression of air
D. Ideal compression of air
✅ The correct answer is option A.
Minimum thermal efficiency of a steam boiler may be around __________ percent
A. 25
B. 45
C. 65
D. 20
✅ The correct answer is option D.
Heat transfer to the water wall in a high pressure water wall type boiler furnace is mainly by
A. Conduction
B. Convection
C. Both A & B
D. Radiation
✅ The correct answer is option D.
Which of the following metals is not subjected to electrolytic refinning/purification?
A. Copper
B. Zinc
C. Tin
D. Aluminium
✅ The correct answer is option C.
Malleabilisation heat treatment is performed on
A. Cast steel
B. Grey cast iron
C. White cast iron
D. Spheroidal graphite cast iron
✅ The correct answer is option C.