Related Questions

Catalytic action in a catalytic chemical reaction follows from the ability of catalyst to change the
A Activation energy
B Equilibrium constant
C Heat of reaction
D None of these
Catalyst used in the 'catalytic converter' employed in automobile exhaust line for complete combustion/oxidation of carbon monoxide, nitrogen oxides and hydrocarbons is
A Alumina
B Platinum
C Vanadium pentoxide
D Iron oxide
A three way catalytic converter
A Re-circulates exhaust gases
B Burns fuel vapour gases
C Reduces N2, H2O and CO2 emission levels
D Removes CO, HC and NO2 from the exhaust gases passing through it
Automobile exhaust is passed through two compartments catalytic converter employing platinum as catalyst for
A Conversion of CO into CO2 in the second compartment
B Conversion of NOx into N2 and NH3 in the first compartment
C Oxidation of unburnt hydrocarbon fuel in the second compartment
D All of the above
Multistage centrifugal pumps are used to
A Give high discharge
B Produce high heads
C Pump viscous fluids
D All of these
Multistage centrifugal pumps are used to obtain
A High discharge
B High head
C Pumping of viscous fluids
D High head and high discharge
Multistage centrifugal pumps are generally used for
A High head
B Low head but high discharge
C Highly viscous liquid
D Slurries of high solid concentration
Multistage compressors are used in industry, because they
A Reduce the cost of compressor
B Reduce the size requirement
C Resemble closely to isothermal compression
D Are easy to control
The total gain of a multistage amplifier is less than the product of the gains of individual stages due to ___________
A Power loss in the coupling device
B Loading effect of the next stage
C The use of many transistors
D The use of many capacitors
The cascade amplifier is a multistage configuration of
A CC-CB
B CE-CB
C CB-CC
D CE-CC

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