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MCQs 1: In alkaline cell the electrolyte is_____________?

dilute sulphuric acid concentrated sulphuric acid NaOH KOH
Answer Explanation

MCQs 2: A typical output of a solar cell is_____________?

0.1V 0.26 V 1.1 V 2 V
Answer Explanation

MCQs 3: Which of the following factors adversely affects the capacity of the leadacid battery ?

Temperature of surroundings Specific gravity of electrolyte Rate of discharge All of the above
Answer Explanation

MCQs 4: In a lead-acid battery the energy is stored in the form of___________?

charged ions chemical energy electrostatic energy electromagnetic energy
Answer Explanation

MCQs 5: Satellite power requirement is provided through________?

solar cells dry cells nickel-cadmium cells lead-acid batteries
Answer Explanation

MCQs 6: Cells are connected in parallel to__________?

increase the efficiency increase the current capacity increase the voltage output increase the internal resistance
Answer Explanation

MCQs 7: Which among the following constitutes the major load for an automobile battery _________?

Brake light Self starter Parking lights Spark plugs
Answer Explanation

MCQs 8: When the load resistance equals the generator resistance which of the following will be maximum __________?

Current Efficiency of the circuit Power in the load resistance Voltage across the load resistance
Answer Explanation

MCQs 9: Under normal charging rate, the charging current should be__________?

10% of capacity 20% of capacity 30% of capacity 40% of capacity
Answer Explanation

MCQs 10: A constant-voltage generator has___________?

minimum efficiency minimum current capacity low internal resistance high internal resistance
Answer Explanation

MCQs 11: Which of the following is incorrect ?

A storage cell has a reversible chemical reaction A lead-acid cell can be recharged A carbon-zinc cell has unlimited shelf life A primary cell has an irreversible chemical reaction
Answer Explanation

MCQs 12: While preparing electrolyte for a lead-acid battery___________?

water is poured into acid acid is poured into water anyone of the two can be added to other chemical
Answer Explanation

MCQs 13: The common impurity in the electrolyte of lead-acid battery is_____________?

chlorine dust particles lead crystals iron
Answer Explanation

MCQs 14: Petroleum jelly is applied to the electrical connections to the lead-acid battery___________?

prevent local heating prevent short-circuiting reduce path resistance prevent corrosion
Answer Explanation

MCQs 15: Which of the following cell has a. reversible chemical reaction ___________?

Lead-acid Mercury oxide Carbon-zinc Silver-oxide
Answer Explanation

MCQs 16: When two batteries are connected in parallel, it should be ensured that___________?

they have same e.m.f. they have same make they have same ampere-hour capacity they have identical internal resistance
Answer Explanation

MCQs 17: Which of the following has lower specific gravity V__________?

Dilute H2S04 Concentrated H2SO4 Water Any of the above
Answer Explanation

MCQs 18: Which of the following battery is used for air-craft _____________?

Lead-acid battery Nickel-iron battery Dry cell battery Silver oxide battery
Answer Explanation

MCQs 19: In a battery cover is placed over the element and sealed to the top of the battery container. This is done____________?

to reduce evaporation of water from electrolyte to exclude dirt and foreign matter from the electrolyte to discharge both of the above functions to discharge none of the above functions
Answer Explanation

MCQs 20: Hydrogen evolved during charging produces explosive mixture when it is more than___________?

2% 4% 6% 8%
Answer Explanation

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