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.Management Sciences
Category: CHEMICAL ENGINEERING
Leaching of coarse solid lumps is also termed as _____________________?
A. Decoction
B. Dissolution
C. Percolation
D. Agitation and settling
Which of the following is an autocatalytic reaction ?
A. Photochemical reactions
B. Microbial fermentation reaction
C. Enzyme fermentation reaction
D. Ammonia synthesis reaction
The main drawback of supplying more excess air in the combustion of fuel is the_________________?
A. Excessive power requirement of air blower
B. Enhanced sensible heat loss in the flue gas
C. Intermittent and uncontrolled combustion of the fuel
D. High exit flue gas temperature from the furnace
Optimum reaction temperature in steam reforming of naphtha is ______________ °C?
A. 700 – 1000
B. 300 – 450
C. 1500-1700
D. 100-200
Dacron is a ___________________?
A. Condensation product of Hexamethylene diamine and adipic acid
B. Thermosetting material
C. Condensation product of dimethyl terephthalate and ethylene glycol
D. None of these
What happens in a reversible adiabatic compression ?
A. Heating occurs
B. Cooling occurs
C. Pressure is constant
D. Temperature is constant
In troposphere (the weather domain), the temperature ‘t’ at height ‘h’ above the sea level in metres is given by (where, temperature at sea level is 15°C and t is in °C.) ?
A. t = 15 – 0.0065 h
B. t = 15 + 0.0065 h
C. t = 0.0035 h – 15
D. t = 15 – 0.0035 h
Reference points i.e., ice point and steam point in Reaumer temperature scale are respectively_________________?
A. – 273° & 80°
B. 0° & 80°
C. 32° & 460°
D. 32° & 80°
For a vapour phase catalytic reaction (A + B → P) which follows the Ridel mechanism and the reaction step is rate controlling, the rate of reaction is given by (reaction rate is irreversible, product also absorbs) ?
A. -rA = (k . PA . PB)/(1 + KAPA + KPPP)
B. -rA = (k . PA
2 – k1PP)/(1 + KAPA + KPPP)
C. -rA = (k . PA . PB)/(1 + KAPB + KBPB . KPPP)
D. -rA = (k . PA . PB)/(1 + KAPA)
Fine grained steels have____________________?
A. High brittleness
B. Higher tendency to distort
C. High ductility
D. None of these
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