Deck 14: Batteries

Question 1

Nickel-metal hydride cells are very popular for portable equipment such as notebook computers, video cameras, cell phones, and many others.

Answer 1

False

Question 2

In a charging circuit, the generator voltage must equalize and overcome the battery emf and have a small enough value to produce a current below the resistance of the circuit.

Answer 2

False

Question 3

In secondary cells, the electrochemical action is reversible.

Answer 3

True

Question 4

Georges Leclanche improved the basic battery cell by using a solution of water and ____ instead of hydrochloric acid.

A)ammonium chloride
B)sulfuric acid
C)ammonium phosphide
D)magnesium chloride

Question 5

The Leclanche, alkaline, and mercury cells are the most widely used dry cells.

Question 6

The inside of a cell is not dry but rather is a moist paste (when the cell is new).

Question 7

Batteries are combinations of three or more cells for the attainment of higher voltages or currents.

Question 8

Cells are classified, according to the nature of their ____ activity, as being primary or secondary.

A)electromotive
B)chemical
C)physical
D)electrical

Question 9

When multiple power sources are connected in parallel, there is a great increase in emf.

Question 10

The ____ cell is structurally stronger and lighter in weight than lead cells of the same current rating.

A)Epsom
B)Franklin
C)Junger
D)Edison

Question 11

In a ____cell, the material giving electrons and the material taking electrons are not contained within the cell.

A)zinc-air
B)mercury
C)fuel
D)primary

Question 12

The voltage derived from a cell depends solely on the type of materials used in the construction of the cell.

Question 13

In low-current applications, such as the memory-retention circuits of computerized equipment, ____ batteries often last for many years with virtually undiminished voltage output up to the last moments of life.

A)alkaline
B)mercury
C)Leclanche
D)lithium

Question 14

A battery is charged by forcing ____ through it in a direction opposite to that of normal battery operation.

A)electrolytes
B)electrons
C)H+ ions
D)a current

Question 15

Electrons move from positive to negative in the outer circuit (the load), but inside the source they move from negative to positive.

Question 16

The ____ and oxygen released by a battery being charged form an explosive gas mixture that can be ignited by sparks or open flames.

A)carbon
B)nitrogen
C)hydrogen
D)helium

Question 17

A hydrometer measures the specific gravity of the electrolyte in each cell.

Question 18

A great many automobile batteries probably go bad because of the accidental entry of ____ into a cell.

A)dirt
B)water
C)sulfuric acid
D)air

Question 19

____ electrolyte membrane fuel cells offer high-power density combined with low weight and volume compared with other types of fuel cells.

A)Polymer
B)Ceramic
C)Copper-coated
D)Zinc

Question 20

The safest charging procedure is a ____ rate, or less, requiring about 24 hours.

A)10-ampere
B)20-ampere
C)60-ampere
D)100-ampere