Wireman – Semester 1, Module 5: Cells and Batteries

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Common for Wireman Trade 1st Year

NAME *

NAME OF THE ITI *

MOBILE NUMBER *

1: Which is the formula to express Faradays law of electrolysis? *

3 points

2: What is the process of chemical decomposition produced by current passed through electrolyte? *

2 points

A : Electromagnetism

B : Electrolysis

C : Electrodynamic

D : Electro statics

3 : Which is the positive (Anode) electrode in silver oxide cells? *

2 points

A : zinc

B : copper

C : carbon

D : Silver oxide

Other:

4 : Which is rechargeable cell? *

2 points

A : Voltaic cell

B : Carbon zinc cell

C : Lead acid cell

D : Mercury cell

5: Which material is used as positive electrode in a dry cell? *

2 points

A : Zinc

B : Carbon

C : Copper

D : Lithium

6 : Which is the negative electrode in voltaic cell? *

2 points

A : Carbon

B : Copper

C : Zinc

D : Lithium

7 : Which electrolyte is used in lead acid battery? *

2 points

A : Diluted hydrochloric acid

B : Concentrated ammonium chloride

C : Concentrated potassium hydroxide

D : Diluted sulphuric acid

8 : What is the name of part marked as x? *

2 points

A : Container

B : Plates

C : Separators

D : Terminals

9 : What is the name of the part marked as ´x´of lead acid battery? *

3 points

A : Separators

B : Container

C : Post terminal

D : Plates

10 : What is the purpose of separators provided in lead acid battery? *

2 points

A : To avoid short between positive and negative plates

B : To avoid short between plates and body

C : To avoid buckling effect

D : To avoid sedimentation effect

11: Which material the positive Failure plates are made in lead acid battery? *

2 points

A : Spongy lead (Pb)

B : Lead peroxide (PbO2)

C : Lead sulphate (PbSO4)

D : Zinc sulphate (ZnSO4)

12 : Which formula is used to calculate internal resistance (R i) of a cell? *

3 points

13 : Why cells are connected in series? *

2 points

A : To reduce total voltage

B : To obtain higher current

C : To obtain higher voltage

D : To reduce current

14 : What is the name of the charge that given to a battery if it is in danger of becoming over discharged during working? *

3 points

A : Boost charge

B : Freshening charge

C : Trickle charge

D : Initial charge

15 : Which method is used to charge the battery at very low rate and long period? *

2 points

A : Rectifier method

B : Trickle charging method

C : Constant current method

D : Constant potential method

16: Which instrument is used to measure electrolyte specific gravity? *

2 points

A : Barometer

B : Hydrometer

C : Lactometer

D : Thermometer

17 : Why the vent plugs are kept open during charging of lead acid battery? *

2 points

A : Check the level of electrolyte

B : Release the gas produced

C : Enter the oxygen from atmospheric air

D : Check the condition of plates

18 : Which is applied on the battery terminals to avoid corrosion? *

2 points

A : Solid grease

B : Petroleum jelly

C : Lubricating oil

D : Liquid grease

19: What happens to the terminal voltage of a cell if load is increased? *

2 points

A : Decreases

B : Increases

C : Remain same

D : Falls to zero

20 : Which is the purpose of inverter? *

2 points

A : Convert AC to DC

B : Convert low voltage DC to high voltage DC

C : Convert low voltage AC to high voltage AC

D : Convert DC to AC

21: Which device converts AC to DC ininverter? *

2 points

A : SCR

B : Metal rectifiers

C : Bridge rectifiers

D : Full wave rectifiers

22 : What is the full form of abbreviation of UPS? *

2 points

A : Uni directional Power Supply

B : Un interrupted Power Supply

C : Uniform Power Supply

D : Un regulated Power Supply

23 : Which is used as stand by source for critical loads in absence of AC supply? *

2 points

A : Inverter

B : UPS

C : Voltage Stabilizer

D : Regulated Power Supply

24 : Which converts light energy into electrical energy? *

2 points

A : Thermistors

B : Sensistors

C : Photovoltaic cell

D : Light dependent resistor

25 : Which batteries can be kept in the AC room along with inverter? *

2 points

A : Nickel cadmium batteries

B : SMF batteries

C : Tubular batteries

D : Nickel iron batteries

26 : Which is the unit of capacity of a storage cell? *

2 points

A : Ampere-hour (A)

B : Watt

C : Volt Ampere (VA)

D : Ampere

27 : Which factor the capacity of a cell depends? *

2 points

A : Distance between plates

B : Material of positive plate

C : Material of negative plate

D : Size of plates

28: Which cell has high shelf life? *

2 points

A : Dry cell

B : Leclanche cell

C : Lithium cell

D : Alkaline cell

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