Electrolysis and Storage Batteries MCQs
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While charging accumulators, one should
- A. check the acid level with a lighted match
- B. short cells to see if they are full charged
- C. keep them in a well-ventilated space
- D. connect and disconnect them with the supply on
- Correct Answer: Option C
The advantage of the iron-nickel over the lead-acid battery is that
- A. it has much higher efficiency
- B. it needs less maintenance
- C. the cell voltage of the iron-nickel battery is higher
- D. it is much cheaper
- Correct Answer: Option B
A cell which is used as voltage reference source for instrument calibration is
- A. solar cell
- B. dry cell
- C. mercury-cadmium cell
- D. nickel-cadmium cell
- Correct Answer: Option C
A fuel cell converts ___ energy into electrical energy.
- A. mechanical
- B. magnetic
- C. chemical
- D. solar
- Correct Answer: Option C
During the charging period of a lead-acid battery, the charging rate is lowered to prevent violent gassing because
- A. the gasses given off are explosive
- B. evaporation of the electrolyte will weaken its effect
- C. the cells will be subjected to excessive pressure
- D. violent gassing tends to wash the active material from the plates
- Correct Answer: Option D
Which of the following affects the capacity of a lead-acid battery?
- A. temperature
- B. discharge time
- C. specific gravity
- D. all of these
- Correct Answer: Option D
Separators in storage battery cell are designed to prevent plates from
- A. touching the electrolyte
- B. touching the container
- C. shorting together
- D. shorting to the sediment
- Correct Answer: Option C
Charging a lead-acid cell causes the electrolyte to become
- A. stronger
- B. stable
- C. weaker
- D. water
- Correct Answer: Option A
Which of the following is a primary cell
- A. mercury oxide
- B. lead-acid
- C. nickel-iron-alkaline
- D. nickel-cadmium-alkaline
- Correct Answer: Option A
A partially discharged lead storage battery may be brought back to full charge by
- A. adding sulphuric acid
- B. adding distilled water
- C. applying ac voltage across the terminals
- D. applying dc voltage across the terminals
- Correct Answer: Option D