Related Questions

In constant voltage charging method, the charging current from discharged to fully charged condition
A decreases
B increases
C remains constant
D none of the above
Under normal charging rate, the charging current should be
A 10% of capacity
B 20% of capacity
C 30% of capacity
D 40% of capacity
A trickle bed reactor is the one, which
A Has altogether three streams either entering or leaving
B Processes three reactants at different flow rates
C Processes three reactants with same flow rate
D Employs all the three phases (i.e.. .solid, liquid and gas)
During charging the specific gravity of the electrolyte of a lead-acid battery
A increases
B decreases
C remains the same
D becomes zero
Battery charging equipment is generally installed
A In well ventilated location
B In clean and dry place
C As near as practical to the battery being charged
D In location having all above features
Excessive charging a battery tends to
A produce gassing
B increase the internal resistance of the battery
C to corrode the positive plates into lead peroxide thereby weakening them physically
D bring about all above changes
Charging a sulphated battery at high rate results in
A boiling of electrolyte due to gassing
B warping of plates
C damage to separators, cell caps covers and battery case due to excessive temperature
D all above
Following will happen if battery charging rate is too high
A excessive gassing will occur
B temperature rise will occur
C bulging and buckling of plates will occur
D all above will occur
Sometimes water is sprayed during coal charging in the coke oven, which helps in
A Prevention of clinker formation in the oven
B Controlling the dust nuisance while charging the coal
C Reducing the cracking of hydrocarbons in the gas and increasing the percentage of CO & H2 in the gas (due to the endothermic reaction represented by C + H2O = CO + H2)
D All of the above
In a battery cover is placed over the element and sealed to the top of the battery container. This is done
A to reduce evaporation of water from electrolyte
B to exclude dirt and foreign matter from the electrolyte
C to discharge both of the above functions
D to discharge none of the above functions

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