Practice Test: Question Set - 12
1. The active materials of a nickel-iron battery are
- (A) Nickel hydroxide
- (B) Powdered iron and its oxide
- (C) 21% solution of KOH
- (D) All of the above
2. When the lead-acid cell is fully charged, the electrolyte assumes ________ appearance
- (A) Dull
- (B) Reddish
- (C) Bright
- (D) Milky
3. Lead-acid cell has a life of nearly charges and discharges
- (A) 500
- (B) 700
- (C) 1000
- (D) 1250
4. Internal short circuits are caused by
- (A) Breakdown of one or more separators
- (B) Excess accumulation of sediment at the
bottom of the cell
- (C) Both (A) and (B)
- (D) None of the above
5. The substances which combine together to store electrical energy during the charge are called _________ materials
- (A) Active
- (B) Passive
- (C) Inert
- (D) Dielectric
6. Battery container should be acid resistance; therefore it is made up of
- (A) Glass
- (B) Plastic
- (C) Wood
- (D) All above
7. ________ of electrolyte indicates the state of charge of the battery
- (A) Color
- (B) Mass
- (C) Viscosity
- (D) Specific gravity
8. In alkaline cell the electrolyte is
- (A) Dilute sulphuric acid
- (B) Concentrated sulphuric acid
- (C) NaOH
- (D) KOH
9. A battery of 6 cells will show a drop of _________ volts from fully charged state to fully discharged state.
- (A) 1.0
- (B) 1.5
- (C) 2.4
- (D) 2.9
10. A typical output of a solar cell is
- (A) 0.1 V
- (B) 0.26 V
- (C) 1.1 V
- (D) 2 V
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