Hindalco Industries Technician Interview Questions and Answers

The unit of resistance is ohm (Ω).

• The unit of resistance is measured in ohms (Ω).

• Resistance is denoted by the symbol 'R' in equations.

• One ohm is equal to one volt per ampere (1 Ω = 1 V/A).

Current is the flow of electric charge in a circuit.

• Current is the rate of flow of electric charge in a circuit.

• It is measured in Amperes (A).

• Current flows from positive to negative terminal in a circuit.

• There are two types of current - AC (Alternating Current) and DC (Direct Current).

A magnet is an object that produces a magnetic field and attracts certain materials like iron.

• A magnet has two poles - north and south.

• Opposite poles attract each other while like poles repel.

• Magnets can be natural (lodestone) or man-made (permanent magnets).

Transformer works on the principle of electromagnetic induction to transfer electrical energy between two or more circuits.

• Transformers have two coils of wire, known as primary and secondary coils.

• When an alternating current flows through the primary coil, it creates a changing magnetic field.

• This changing magnetic field induces a voltage in the secondary coil, transferring electrical energy.

• The ratio of the number of ...read more

The value of Indian frequency is 50 Hz.

• The standard frequency used in India for electrical power distribution is 50 Hz.

• This frequency is used for both residential and industrial purposes.

• It is important for ensuring compatibility of electrical equipment and appliances.

• In contrast, countries like the United States use a frequency of 60 Hz.

The unit of current is Ampere (A).

• The unit of current is Ampere (A)

• It is named after the French physicist Andre-Marie Ampere

• Current is the flow of electric charge in a circuit

A magnetic field is a region around a magnetic material or a moving electric charge within which the force of magnetism acts.

• A magnetic field is produced by moving electric charges or magnetic materials.

• It exerts a force on other moving charges and magnetic materials within its vicinity.

• The strength and direction of a magnetic field can be represented by magnetic field lines.

• Examples include the Earth's magnetic field

The laws of resistance describe how the resistance of a material is affected by factors such as length, cross-sectional area, and temperature.

• Resistance is directly proportional to the length of the material - longer materials have higher resistance.

• Resistance is inversely proportional to the cross-sectional area of the material - larger cross-sectional areas have lower resistance.

• Resistance increases with temperature ...read more

The relationship between current, voltage, and resistance is described by Ohm's Law.

• Ohm's Law states that the current flowing through a conductor is directly proportional to the voltage applied across it and inversely proportional to the resistance of the conductor.

• Mathematically, Ohm's Law is expressed as I = V/R, where I is the current in Amperes, V is the voltage in Volts, and R is the resistance in Ohms.

• This relati...read more

The micrometer list count refers to the number of items or components listed in a micrometer measurement tool.

• The micrometer list count is the total number of items listed on a micrometer measurement tool

• It helps in accurately measuring the dimensions of small objects or components

• For example, a micrometer list count of 0.01mm indicates that the tool can measure up to 0.01mm precision

The list count of varniya caliper is typically 0, as varniya caliper is not a standard or commonly used tool in the field of measurement.

• Varniya caliper is not a standard tool in the field of measurement

• There is no specific list count for varniya caliper as it is not commonly used

• It is important to use standard calipers for accurate measurements

The material of the drill bit depends on the type of material being drilled and the desired outcome.

• Drill bits can be made of high-speed steel, cobalt steel, carbide, or diamond.

• High-speed steel drill bits are versatile and suitable for drilling wood, plastic, and soft metals.

• Cobalt steel drill bits are harder and more heat-resistant, making them ideal for drilling hard metals.

• Carbide drill bits are extremely hard and ...read more

Center punches are tools used to make small indentations in metal or other materials for drilling or marking purposes.

• Automatic center punch: Spring-loaded for easy one-handed operation

• Manual center punch: Requires a hammer to create the indentation

• Transfer punch: Used for transferring hole locations from one material to another

• Prick punch: Has a sharper point for more precise marking

Extrusion presses are used to create products with a consistent cross-sectional profile by forcing material through a die.

• There are different types of extrusion presses based on the method of operation, such as direct extrusion press, indirect extrusion press, and impact extrusion press.

• Direct extrusion presses push the material through the die using a ram, while indirect extrusion presses pull the material through the...read more