Computer Programming MCQs

5739 MCQs  (Page 153 of 574)

Internal resistance of a cell is reduced by__________?
A. Using vent plug to permit gas formed during discharge
B. Increasing the plate area
C. Putting plates very close together
D. All above methods
Sulphated cells are indicated by____________?
A. The loss of capacity of the cell
B. The decrease of the specific gravity
C. The low voltage of the cell on discharge
D. All above conditions
Local action in a battery is indicated by____________?
A. Excessive gassing under load conditions
B. Excessive drop in the specific gravity of electrolyte even when the cell is on open circuit
C. Both a. and (b)
D. None of the above
Capacity of dry cells is_________?
A. More when it is supplying current for intermittent periods
B. More when it is supplying current for continuous periods
C. Unaffected by the type of discharge
D. None of the above
Cell short circuit results in_________?
A. Low sp. gravity electrolyte
B. Abnormal high temperature
C. Reduced gassing on charge
D. All above
In a lead-acid cell, if the specific gravity of sulphuric acid is 1.8, it will require following ratio of acid to water to get mixture of specific gravity of 1.3
A. 6 parts of acid to 4 parts of water
B. 4 parts of acid to 4 parts of water
C. 4 parts of acid to 6 parts of water
D. 4 parts of acid to 8 parts of water
If a lead-acid cell is discharged below 1.8 V the following will happen.____________?
A. Capacity of cell will reduce
B. Sulphation of plates will occur
C. Internal resistance will increase
D. All above will occur
Internal resistance of a cell is due to___________?
A. Resistance of electrolyte
B. Electrode resistance
C. Surface contact resistance between electrode and electrolyte
D. All above