Deck 13: Batteries

Question 1

Specific gravity is a ______________ comparing the weight of a substance with the weight of water.

Answer 1

ratio

Question 2

A method in which the charger and the battery are always connected to each other to supply current to the load is ______________ charging.

Answer 2

float

Question 3

A ______________ cell is a storage cell that can be recharged by reversing the internal chemical reaction.

Answer 3

secondary

Question 4

A single ______________ cell is a piece of plastic between a couple of pieces of carbon plates that are sandwiched between two end plates acting as electrodes.

Question 5

Solar cells are made of ______________ materials which generate voltage output with light input.

Question 6

An applied voltage higher than the emf of one cell can be obtained by connecting cells in ______________.

Question 7

If there is a short circuit across a generator, its ______________ resistance prevents the current from becoming infinitely high.

Question 8

A generator with a very low internal resistance is considered a ______________ source.

Question 9

A ______________ is a group of cells that generate energy from an internal chemical reaction.

Question 10

A ______________ is used to check specific gravity of a lead-acid battery.

Question 11

A common rating used with lead-acid batteries is

A) power
B) watt-hours
C) ampere-hours
D) milliamperes-minutes

Question 12

A method in which a charger and a battery are always connected to each other to supply current to the load is referred to as

A) trickle charging
B) continuous charging
C) load charging
D) float charging

Question 13

A storage cell that can be recharged by reversing the internal chemical reaction is called a

A) primary cell
B) secondary cell
C) dry cell
D) carbon-zinc battery

Question 14

What type cell has the ability to deliver high current and be cycled many times for recharging?

A) Zinc-chloride
B) Lithium
C) Nickel-cadmium
D) Nickel-iron

Question 15

Which of the following is an advantage of the nickel-metal-hydride cell?

A) Cost is less than NiCd
B) Self-discharge is more slowly than NiCd
C) 40% more capacity than a NiCd
D) Can be cycled more times than a NiCd

Question 16

What type cell is an electrochemical device that converts hydrogen and oxygen into water and in the process produces electricity?

A) Manganese dioxide
B) Solar
C) Fuel
D) Primary

Question 17

Voltage cells made of semiconductor materials are classified as

A) germanium
B) solar
C) fuel
D) optical

Question 18

The combination of cells is called a

A) battery
B) charger
C) recombination
D) constant current generator

Question 19

For more current capacity, the battery

A) has more electrolytes
B) is rechargeable
C) has cells in series
D) has cells in parallel

Question 20

Any source that produces voltage output continuously is a

A) cell
B) battery
C) generator
D) motor

Question 21

A generator with a very low internal resistance is considered a

A) transconductance
B) delta configuration
C) constant-current source
D) constant-voltage source

Question 22

A group of cells that generate energy from an internal chemical reaction is a

A) constant-current source
B) generator
C) battery
D) electrolyte

Question 23

If a source can maintain a constant output for different values of load current

A) internal resistance is low
B) internal resistance is high
C) it must be made up of primary cells
D) it must be made up of secondary cells

Question 24

A secondary cell is also known as a

A) primary cell
B) storage cell
C) dry cell
D) galvanic cell

Question 25

A device for converting chemical energy into electrical energy is a

A) fuel cell
B) voltaic cell
C) solar cell
D) electrolyte

Question 26

The internal resistance of a good cell is about

A) 1 ?
B) 100 ?
C) 1000 ?
D) 1 M?

Question 27

The carbon zinc cell is very common because of its

A) ability to be recharged
B) ability to operate in temperatures of 125°F or higher
C) ability to operate without polarization
D) low cost

Question 28

What cell has an output of 1.5 V and is available as either a primary or secondary cell and lasts much longer than a carbon-zinc cell?

A) Mercuric oxide
B) Alkaline
C) Nickel-iron
D) Lithium

Question 29

What cells are becoming increasingly unavailable due to the hazards associated with proper disposal after use?

A) Mercuric oxide
B) Alkaline
C) Nickel-cadmium
D) Lithium

Question 30

Where is a common place to store small nonrechargeable batteries in order to prolong battery life?

A) Attic
B) Oven
C) Refrigerator
D) Automobile

Question 31

When a high level of current is necessary, which cell is most commonly used?

A) Lead-acid
B) Carbon-zinc
C) Nickel-iron
D) Alkaline

Question 32

How many times more energy can a lithium cell provide than the equivalent carbon-zinc cell?

A) 1
B) 2
C) 5
D) 10

Question 33

Dry batteries are used in most automobiles.

Question 34

If a battery has a high internal resistance, then the source can maintain constant output voltage for different values of load current.

Question 35

Primary cells cannot be recharged.

Question 36

The device for converting chemical energy into electrical energy is sometimes called a galvanic cell.

Question 37

An internal resistance of 100 ? is considered good for a voltage source cell.

Question 38

The electrolyte, cost, stability, and long life are important for the construction of commercial batteries.

Question 39

A carbon-zinc D cell may operate for only a few hours with a continuous drain at its rated current.

Question 40

Mercury cells are becoming increasingly unavailable due to hazards associated with proper disposal after use.

Question 41

It is common practice to store small nonrechargeable batteries in a warm place.

Question 42

A lithium cell can provide at least 10 times more energy than the equivalent carbon-zinc cell.

Question 43

Where a high level of load current is necessary, the lead-acid cell is the type most commonly used.

Question 44

The lead-acid cell cannot be recharged.

Question 45

An applied voltage higher than the emf of one cell can be obtained by connecting cells in parallel.

Question 46

A dry cell has a moist electrolyte.