Wireman – 1st YEAR Module 5: Cells and Batteries
98 : Which is the formula to express Faradays law of electrolysis?
99 : What is the process of chemical decomposition produced by current passed through electrolyte?
A : Electromagnetism
B : Electrolysis
C : Electrodynamic
D : Electro statics
100 : Which is the positive (Anode) electrode in silver oxide cells?
A : zinc
B : copper
C : carbon
D : Silver oxide
101 : Which is rechargeable cell?
A : Voltaic cell
B : Carbon zinc cell
C : Lead acid cell
D : Mercury cell
102 : Which material is used as positive electrode in a dry cell?
A : Zinc
B : Carbon
C : Copper
D : Lithium
103 : Which is the negative electrode in voltaic cell?
A : Carbon
B : Copper
C : Zinc
D : Lithium
104 : Which electrolyte is used in lead acid battery?
A : Diluted hydrochloric acid
B : Concentrated ammonium chloride
C : Concentrated potassium hydroxide
D : Diluted sulphuric acid
105 : What is the name of part marked as x ?
A : Container
B : Plates
C : Separators
D : Terminals
106 : What is the name of the part marked as ´x´ of lead acid battery?
A : Separators
B : Container
C : Post terminal
D : Plates
107 : What is the purpose of separators provided in lead acid battery?
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
108 : Which material the positive Faure plates are made in lead acid battery?
A : Spongy lead (Pb)
B VIEW ANSWER
109 : Which formula is used to calculate internal resistance (Ri) of a cell?
110 : Why cells are connected in series?
A : To reduce total voltage
B : To obtain higher current
C : To obtain higher voltage
D : To reduce current
111 : What is the name of the charge that given to a battery if it is in danger of becoming over discharged during working?
A : Boost charge
B : Freshening charge
C : Trickle charge
D : Initial charge
112 : Which method is used to charge the battery at very low rate and long period?
A : Rectifier method
B : Trickle charging method
C : Constant current method
D : Constant potential method
113 : Which instrument is used to measure electrolyte specific gravity?
A : Barometer
B : Hydrometer
C : Lactometer
D : Thermometer
114 : Why the vent plugs are kept open during charging of lead acid battery?
A : Check the level of electrolyte
B : Release the gas produced
C : Enter the oxygen from atmospheric air
D : Check the condition of plates
115 : Which is applied on the battery terminals to avoid corrosion?
A : Solid grease
B : Petroleum jelly
C : Lubricating oil
D : Liquid grease
116 : What happens to the terminal voltage of a cell if load is increased?
A : Decreases
B : Increases
C : Remain same
D : Falls to zero
117 : Which is the purpose of inverter?
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
118 : Which device converts AC to DC in inverter?
A : SCR
B : Metal rectifiers
C : Bridge rectifiers
D : Full wave rectifiers
119 : What is the full form of abbreviation of UPS?
A : Uni directional Power Supply
B : Un interrupted Power Supply
C : Uniform Power Supply
D : Un regulated Power Supply
120 : Which is used as stand by source for critical loads in absence of AC supply?
A : Inverter
B : UPS
C : Voltage Stabilizer
D : Regulated Power Supply
121 : Which converts light energy into electrical energy?
A : Thermistors
B : Sensistors
C : Photovoltaic cell
D : Light dependent resistor
122 : Which batteries can be kept in the AC room along with inverter?
A : Nickel cadmium batteries
B : SMF batteries
C : Tubular batteries
D : Nickel iron batteries
123 : Which is the unit of capacity of a storage cell?
A : Ampere-hour (A)
B : Watt
C : Volt Ampere (VA)
D : Ampere
124 : Which factor the capacity of a cell depends?
A : Distance between plates
B : Material of positive plate
C : Material of negative plate
D : Size of plates
125 : Which cell has high shelf life?
A : Dry cell
B : Leclanche cell
C : Lithium cell
D : Alkaline cell