The best indication about the state of charge on a lead-acid battery is given by

Which of the following factors adversely affects the capacity of the leadacid battery ?

A

Temperature of surroundings

B

Specific gravity of electrolyte

C

Rate of discharge

D

All of the above

The ampere-hour efficiency of a leadacid cell is normally between

A

20 to 30%

B

40 to 50%

C

60 to 70%

D

90 to 95%

The following indicate that battery on charge has attained full charge

A

colour of electrode

B

gassing

C

specific gravity

D

all above

In a battery cover is placed over the element and sealed to the top of the battery container. This is done

A

to reduce evaporation of water from electrolyte

B

to exclude dirt and foreign matter from the electrolyte

C

to discharge both of the above functions

D

to discharge none of the above functions

The battery is an electrochemical device, which means battery

A

Makes chemicals by mechanical means

B

Uses chemical action to provide electricity

C

Has curved plates instead of flat plates

D

Does not use an electrolyte

_______ of electrolyte indicates the state of charge of the battery

A

colour

B

mass

C

viscosity

D

specific gravity

If a battery is wrongly connected on charge following will happen

A

current delivered by the battery will be high

B

current drawing will be nil

C

current drawing will be very small

D

current drawing will be very high

Gradually increasing temperature of flue gases at inlet to chimney for given steam outputs is an indication of

A

Higher effectiveness of boiler

B

High calorific value coal being burnt

C

Fouling of heat transfer surfaces

D

Raising of steam temperature

When semaphore and warner are installed on the same post, then the stop indication is given when

A

both arms are horizontal

B

semaphore arm lowered but warner arm horizontal

C

both semaphore and warner arms lowered

D

none of the above

The charge of a room at Sheraton is 25% less than that of a room at Westin and 10% less than that of a room at Sonargaon . By what percent is the charge of a room at Westin is greater than that of Sonargaon ?

A

15%

B

17%

C

19%

D

20%

The best indication about the state of charge on a lead-acid battery is given by

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