The complete combusion of 1 pound of carbon requires
A.2.66 pounds of air
B.29 pounds of air
C.11.5 pounds of air
D.12.6 pounds of air
Category: Chemical Engineering Mcqs
Three rods one made of glass, one of pure aluminium and one made of wrought iron are heated to 150?C. All the rods are 15 mm in diameter and 300 mm long. The lowest temperature at the free end of the rods will occur in case of
A.Aluminium rod
B.Wrought iron rod
C.Glass rod
D.Temperature will be same for all the three rods at free end
E.Temperature will depend on the surrounding air temperature
The degree of ionisation does not depend upon
A.nature of solvent
B.nature of solute
C.temperature
D.current strength
Mixed fertilizers contain three principal elements (nitrogen phosphorus and potassium). 5-10-5 mixed fertilizer contains
A.5 wt. % P2O5 10%N 5% K2O
B.5 wt. % N 10% P2O5 5% K2O
C.5 wt. % N 10% P2O5 85% K2O
D.10 wt. % N 10% P2O5 5% K2O
The density of the hydrocarbon liquids
A.remains unaffected with change in the number of carbon and hydrogen atoms in hydrocarbon molecules
B.decreases with increase in the number of carbon and hydrogen atoms in hydrocarbon molecules
C.increases with increase in the number of carbon and hydrogen atoms in hydrocarbon molecules
D.none of the above
The solvent used in the dewaxing of the waxy oil feed is
A.liquid sulphur trioxide
B.composed of methyl ethyl ketone and toluene
C.composed of triethylene glycol and water
D.platinum
Atoms of U-235 and U-238 differ in structure by
A.three electrons
B.three protons
C.three neutrons
D.three electrons and three protons
The mass of water vapour per kg of the pressure of saturated vapour at the air is known as
A.Specific humidity
B.Relative humidity
C.Molar humidity
D.Humidity ratio
E.None of the above
For which fluid combination the value of overall heat transfer coefficient will be least?
A.Feed water heaters
B.Alcohol condensers
C.Air to heavy tars
D.Air condensers
In a fabric filter the pressure drop
A.increases directly as viscosity of the gas and inversely as density of the gas
B.increases directly as density of the gas and inversely as viscosity of the gas
C.increases directly as density of the gas and independent of the viscosity of the gas
D.none of the above
