Question: The e.m.f. of an Edison cell, when fully charged, is nearly______________?

• 1. 1.4 V
• 2. 1 V
• 3. 0.9 V
• 4. 0.8 V

Question: The internal resistance of an alkali cell is nearly _________ times that of the lead-acid cell.

• 1. two
• 2. three
• 3. four
• 4. five

Question: The capacity of a lead-acid cell depends on:

• 1. rate of discharge
• 2. temperature
• 3. density of electrolyte
• 4. all above

Question: The ampere-hour efficiency of a lead acid cell is normally between_________?

• 1. 20 to 30%
• 2. 40 to 50%
• 3. 60 to 70%
• 4. 90 to 95%

Question: When the lead-acid cell is fully charged, the electrolyte assumes _______ appearance.

• 1. dull
• 2. reddish
• 3. bright
• 4. milky

Question: The active material of the positive plates of silver-zinc batteries is_________?

• 1. silver oxide
• 2. lead oxide
• 3. lead
• 4. zinc powder

Question: The average charging voltage for alkali cell is about__________?

• 1. 1 V
• 2. 1.2 V
• 3. 1.7 V
• 4. 2.1 V

Question: The watt-hour efficiency of a lead-acid cell varies between________?

• 1. 25 to 35%
• 2. 40 to 60%
• 3. 70 to 80%
• 4. 90 to 95%

Question: Trickle charging of a storage battery helps to___________?

• 1. maintain proper electrolyte level
• 2. increase its reserve capacity
• 3. prevent sulphation
• 4. keep it fresh and fully charged

Question: It is noticed that durum charging___________?

• 1. there is a rise in voltage
• 2. energy is absorbed by the cell
• 3. specific gravity of H2SO4 is increased
• 4. all of the above