Question is ⇒ For keeping the lead acid battery terminals free from corrosion it is advisable to, Options are ⇒ (A) keep electrolyte level low, (B) apply petroleum jelly., (C) charge the battery at frequent intervals., (D) , (E) , Leave your comments or Download question paper.

Question is ⇒ For keeping the lead acid battery terminals free from corrosion it is advisable to, Options are ⇒ (A) keep electrolyte level low, (B) apply petroleum jelly., (C) charge the battery at frequent intervals., (D) , (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	For keeping the lead acid battery terminals free from corrosion it is advisable to
A.	keep electrolyte level low [Wrong Answer]
B.	apply petroleum jelly. [Correct Answer]
C.	charge the battery at frequent intervals. [Wrong Answer]
View Answer 6 -3 Explanation:- Answer : B Discuss it below : !! OOPS Login [Click here] is required to post your answer/result Help other students, write article, leave your comments

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⇒ Common impurity in a battery electrolyte is
dust particles.
iron.
lead crystals.
sodium chloride.

⇒ What carries current in an electrolyte
Electrons only
- ve ions only
+ ve ions only
Both + ve and - ve ions

⇒ Addition of which of the following substances in electrolyte promotes smooth deposition?
Albumen.
Glucose.
Phenol.
Any of these.

⇒ The condition of a fully charged lead acid battery cannot be ascertained by
gassing.
voltage.
colour of the electrodes.
specific gravity of the electrolyte.

⇒ In a battery, cover is placed over the elements and sealed at the top of the battery container. This is done in order to
exclude dirt and foreign matter from the electrolyte.
reduce evaporation of water from electrolyte.
both (a) and (b).
none of the above

⇒ Cells are connected in parallel in order to increase the
life of the cells.
efficiency.
current capacity.
voltage rating.

⇒ Capacity of a dry cell is
more when it supplies current continuously.
more when it supplies current intermittently.
not affected by the type of discharge.
none of the above.

⇒ Short circuiting of a cell may be caused by
buckling of plates.
breakdown of one or more separators.
excessive accumulation of sediments at the bottom of the cell.
lead particles forming circuits between positive and negative plates.

⇒ The electric cell is a device to obtain
Electrons
Electric charge
Electric energy from chemical energy
Electric force

⇒ During electrodeposition. the amounts of different substances liberated by same quantity of electricity are proportional to
atomic weights.
valency.
chemical equivalents.
atomic numbers

⇒ Battery charging equipment should be installed
in well ventilated, clean and dry place.
as near as practical to the battery under charge.
both (a) and (b).
wherever convenient.

⇒ The current capacity of a cell is measured in
A
Ah
W
Wh

⇒ In a lead acid battery, fillers are provided to
facilitate flow of gasses
prevent flow of gasses.
recover acid losses through vapours.
reduce tendency for polarisation.

⇒ Standard cell
will have precise and accurate constant voltage when current drawn from it is few microamperes only.
will have precise and accurate constant voltage when few milliamperes are drawn from it.
will continue to have constant voltage irrespective of loading conditions.
can supply voltages up to 10 V.

⇒ A 24 V battery of internal resistance r = 4 ω connected to a variable resistance R. The rate of heat dissipation in the resistor is maximum when the current drawn from the battery is I. The current drawn from the battery will be 1/2 when R is equal to
8 ω
12 ω
16 ω
20 ω

⇒ Which of the following cells is more likely to be damaged due to short circuiting ?
Daniel cell
Dry Cell
Acid cell
Fuel cell

⇒ During electroplating the weight of a substance deposited depends upon
shape of the article
quantity of electricity
room temperature
all of the above

⇒ The emf of primary cell depends upon the
physical dimensions of a cell.
nature of electrolyte.
nature of electrode.
both (b) and (c).

⇒ Rust, scales and oxides can be removed from a surface with the help of
various acids.
alkali and salt solution.
mechanical abrasion.
electrolytic cleaning any of the above.

⇒ Through an electrolyte an electric current is due to drift of
Free electrons
Positive and negative ions
Free electrons and holes
Protons

⇒ During discharging of lead acid cells, the terminal voltage decreases with the decrease in
temperature.
discharge rate.
state of charge.
none of these.

⇒ If the specific gravity of the electrolyte in a lead acid cell increases beyond 1.23 there will be
loss of life.
loss of capacity.
increase in internal resistance.
corrosion of the grids of the plate.

⇒ Nickel-cadmium accumulators in comparison to nickel-iron accumulators have the advantages of
being lighter in weight and cheaper in cost.
low internal resistance and longer life.
higher emf and higher efficiency.
all of the above.

⇒ Which of the following statements is incorrect about lead acid batteries ?
The electrolyte in weak sulphuric acid.
When fully charged both of the plates become lead-per-oxide.
The number of plates is always odd.
The number of negative plates is one more than the number of positive plates.

⇒ Internal resistance of primary cell varies
inversely with the distance between electrodes.
inversely with the surface area of electrodes.
directly with the distance between electrodes
with the nature of electrodes.

⇒ The ratio of the number of hydrogen to that of oxygen atoms liberated in the electrolysis of acidulated water is
1 : 4
1 : 2
2 : 1
4 : 1

⇒ During charging and discharging of an Edison cell
electrolyte does not take part in chemical reaction.
emf remains the same.
corrosive fumes are produced.
nickel hydroxide remains unsplit.

⇒ For achieving uniform thickness of deposit on irregular surface
anode and cathode are kept farther apart
anode and cathode are kept closer.
high current densities are used.
electrolyte is agitated constantly

⇒ A battery is connected to a resistance causing a current of 0.5 A in the circuit. The current drops to 0.4 A when an additional resistance of 5 ω is connected in series. The current will drop to 0.2 A when the resistance is further increased by
10 ω
15 ω
25 ω
40 ω

⇒ Which of the following statements is correct about lead acid batteries ?
It delivers current as soon as its components are put together.
Density of electrolyte increases while delivering current
lt does not deliver current on putting its components together until it is supplied electrical energy from an external source
It has lead as positive plates.