IOCL Junior Operator General Science MCQ || IOCL Junior Operator General Science Questions and Answers

• The purpose of Standard Wire Gauge (SWG) is primarily to measure the diameter of wire.
• This system was developed to standardize wire sizes for various applications, ensuring compatibility and safety in electrical wiring and other uses.

The material used as an electrical insulator is Porcelain.

• Porcelain is a type of ceramic that exhibits excellent electrical insulating properties, making it suitable for high-voltage applications such as insulator strings on overhead power lines and substations.

Pure copper is indeed a highly conductive material, often cited as the second most conductive metal after silver. Its specific conductivity is approximately 0.92 to 0.94 of the International Annealed Copper Standard (IACS).

The material that contains eight electrons in its valency layer is Insulators.

• Insulators are materials that typically have full valence shells, often with eight electrons, which makes them stable and unreactive.

A single strand wire is commonly referred to as Hook up wire.

• Hook up wire is designed for connecting components in electronic circuits and is typically a single, solid conductor.
• It is used in applications where flexibility is not a primary concern, such as panel wiring.

The electrical quantity that is directly proportional to the current carrying capacity of the conductor is Conductor’s diameter.

• A larger conductor diameter increases the cross-sectional area, allowing it to carry more current without overheating.
• This relationship is due to the fact that resistance decreases as the diameter increases, thus enhancing the current carrying capacity.

• The coulomb (C) is the standard unit of electric charge in the International System of Units (SI).
• It is defined as the amount of charge carried by a current of one ampere flowing for one second.

The number of electrons contained in one coulomb of electric charge is 6.25 x 10¹⁸ electrons.

The movement of electrons through a conductor in a particular direction is called Electric current.

• Electric current refers to the flow of electric charge, typically carried by electrons, through a conductive material. It is measured in amperes (A) and represents the rate at which charge flows.

The electrolyte used in a lead-acid battery is Sulphuric acid.

• Lead-acid batteries utilize a solution of sulfuric acid mixed with distilled water as their electrolyte. This solution supports the chemical reactions necessary for the battery’s operation, allowing it to store and release electrical energy effectively.