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90.

How the capacity of batteries is specified ?
A) Volt B) Watt C) Volt Ampere D) Ampere hour

What is the output voltage of Lithium cell ?
‏ھ‎ ۷ 8) 1.5 ४ 0) 2.5 ४ 0) 1.8 ४

What is the purpose of the hydrometer is used during charging of battery ?
A) Determine level of electrolyte

B) Determine the specific gravity of electrolyte

C) Determine discharge level of battery

D) Determine battery voltage level

Which is used as an electrolyte in lead acid battery ?
A) Hydrochloric acid B) Ammonium chloride
C) Potassium hydroxide D) Dilute sulphuric acid

What is the name of defect that bending of plates in secondary cells ?
A) Buckling B) Local action
C) Partial short D) Hard sulphation

Why the vent plug is kept open during charging of battery ?
A) To allow oxygen enter inside

B) To escape the gas freely

C) To check level of electrolyte

D) To check the colour changes in the plates

Which material is used as positive electrode in a dry cell ?

A) Carbon B) Zinc C) Copper D) Lithium
Why cells are connected in series ?

A) To reduce total voltage B) To obtain higher current

C) To obtain higher voltage D) To reduce current

Which method is used to charge the battery at very low rate and long period ?
A) Rectifier method B) Trickle charging method
C) Constant current method D) Constant potential method

Which is rechargeable cell ?
A) Voltaic cell B) Carbon zinc cell
C) Lead acid cell D) Mercury cell

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