Electrical Engineering · Question Bank

Fundamentals of Electricity

141 questions · page 6 of 8. Answer in your head first, then check the solution.

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TypeAll 141Problem solving 47Objective 94
DifficultyAll 141Easy 136Medium 5Hard
#101📘 EE Pocket Reviewer RojasEasy
What is the usual ampere-hour efficiency of a lead acid cell?
A90%
B50%
C70%
D25%
#102📘 EE Pocket Reviewer RojasEasy
In which of the following appliances would you choose a lithium battery?
AA two way portable radio
BA rechargeable table lamp
CA microcomputer memory back up
DA stand-alone solar electric system
#103📘 EE Pocket Reviewer RojasEasy
Impurities in the electrolyte in a lead acid cell can cause internal short circuits called
ASulphation
BElectrolysis
CPolarization
DLocal action
#104📘 EE Pocket Reviewer RojasEasy
The chemical energy of a battery or cell ____.
AIs caused by electric current
BCannot be replenished once it is gone
CChanges to electrical energy when the cell is discharged
DIs stored in the electrolyte only
#105📘 EE Pocket Reviewer RojasEasy
A partially discharged storage battery can be brought back to fully charged state by which of the following?
AAdd sulphuric acid to the electrolyte
BAdd distilled water to the electrolyte
CConnect the battery terminals to a dc source
DConnect the battery terminals to an ac source
#106📘 EE Pocket Reviewer RojasEasy
Which one is true about an alkaline cell in comparison to a carbon-zinc cell?
AIt has shorter shelf life
BIt is cheaper
CIt generally works better in transistor radios
DIt has higher voltages
#107📘 EE Pocket Reviewer RojasEasy
Which one is an advantage of a secondary cell over a primary cell?
AIt can be recharged
BIt is portable
CIt is smaller in size
DIt has a higher capacity
#108📘 EE Pocket Reviewer RojasEasy
During charging of a lead acid battery, what happens to the specific gravity of the electrolyte?
AIt will decrease
BIt will increase
CIt remains the same
DIt will become zero
#109📘 EE Pocket Reviewer RojasEasy
When the electrolyte of a storage battery is low, what will a technician usually do?
ATop up or add distilled water to the electrolyte
BDrain the battery electrolyte
CCharge the battery first before adding electrolyte
DAdd a special acid solution to the electrolyte
#110📘 EE Pocket Reviewer RojasEasy
What is the form of energy stored in a lead-acid cell?
AChemical energy
BSolar energy
CElectro-mechanical energy
DElectrostatic energy
#111📘 EE Pocket Reviewer RojasEasy
The capacity of a lead-acid cell does not depend on which of the following?
ARate of discharge
BQuantity of the active material
CTemperature
DRate of charge
#112📘 EE Pocket Reviewer RojasEasy
What is the purpose of using distilled water in the electrolyte of a lead-acid cell?
AIt speeds up electrochemical action
BIt improves the specific gravity
CIt prevents or slows down local action
DIt prevents polarization of the battery
#113📘 EE Pocket Reviewer RojasEasy
A rechargeable battery is sometimes called
APrimary cell
BSecondary cell
CDry cell
DVoltaic cell
#114📘 EE Pocket Reviewer RojasEasy
What is the advantage of the iron-nickel battery over the lead acid battery?
AIt needs less maintenance
BIt is much cheaper in cost
CThe output voltage is much higher
DIts efficiency is much higher
#115📘 EE Pocket Reviewer RojasEasy
The level of the electrolyte in a cell should be ____ the level of plates.
AAbove
BBelow
CEqual to
DAny of these, depending on type of plates
#116📘 EE Pocket Reviewer RojasEasy
The life of a storage battery is generally measured in terms of the number of ____.
ACells it contains
BPlates it contains
CAh it can deliver
DTimes it can be cycled
#117📘 EE Pocket Reviewer RojasEasy
What type of cells is used by satellites?
ALead-acid cells
BCarbon-zinc cells
CSolar cells
DNickel-cadmium cells
#118📘 EE Pocket Reviewer RojasEasy
What is the purpose of connecting cells in parallel?
ATo increase the output voltage
BTo increase the current capacity
CTo increase the internal resistance
DTo decrease the current capacity
#119📘 EE Pocket Reviewer RojasEasy
Where would you most likely to find a lead-acid battery?
AIn an LCD wall clock
BIn a flashlight
CIn a portable audio CD player
DIn an uninterruptible power supply
#120📘 EE Pocket Reviewer RojasEasy
Which of the following statements is true during ' charging of a lead-acid cell?
AIt gives out energy
BThe voltage output will increase
CThe specific gravity of the electrolyte will decrease
DIts cathode will become dark chocolate in color

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