A. Convection
B. Nucleate boiling
C. Radiation
D. Conduction
✅ The correct answer is option A.
Basic Chemical Engineering MCQs
Which of the following absorbs maximum heat in a high pressure boiler ?
A. Economiser
B. Steam superheater
C. Air preheater
D. Furnace water wall
✅ The correct answer is option D.
__________ remains constant during the adiabatic cooling of moist air.
A. Wet bulb temperature
B. Dry bulb temperature
C. Relative humidity
D. Specific humidity
✅ The correct answer is option A.
Multistage compression of air as compared to single stage compression offers the advantage of
A. Power saving per unit weight of air delivered
B. Moisture elimination in the inter-stage cooler
C. Increased volumetric efficiency
D. All of the above
✅ The correct answer is option D.
__________ welding will be the most suitable for butt welding two 20 cms thick boiler drum mild steel plates.
A. Electrical resistance
B. Electroslag
C. Plasma torch
D. Submerged arc
✅ The correct answer is option B.
Minimum diameter of the tube used for making water manometer should be __________ mm to avoid a correction for the effect of capillarity.
A. 1
B. 2.5
C. 4
D. 6
✅ The correct answer is option D.
Which of the following heat treatment processes is usually applied to castings ?
A. Tempering
B. Annealing
C. Normalising
D. Carburising
✅ The correct answer is option D.
Metal shots used in shot blasting are made of
A. Stellite
B. Steel
C. Bronze
D. Lead
✅ The correct answer is option B.
A highly elastic material is deformed least on loading and retains its original form on removal of the load. Which of the following is the most elastic material?
A. Steel
B. Glass
C. Rubber
D. Brass
✅ The correct answer is option A.
The most commonly used combustion system manufactured in India for the thermal power plant boilers is the __________ combustion system.
A. Pulverised fuel
B. Travelling grate stoker firing
C. Circulating fluidised bed
D. Fluidised bed
✅ The correct answer is option A.