20+ Graduate Apprenticeship Trainee Interview Questions and Answers for Freshers

Questions related to fluid mechanics and cycles in I.C. Engine

• Viscosity is the measure of a fluid's resistance to flow

• Density is the measure of mass per unit volume of a substance

• Newton's law of viscosity states that the shear stress between adjacent fluid layers is directly proportional to the velocity gradient

• Surface tension is the force that causes the surface of a liquid to contract

• Cycles in I.C. Engine include intake, compression, power, and exhaust

• Diesel cycle has const...read more

Earthing and neutral are both important components of electrical systems, but they serve different purposes.

• Earthing is the process of connecting electrical equipment and installations to the earth to prevent electric shock and protect against electrical faults.

• Neutral is a current-carrying conductor that completes the circuit and provides a return path for the current back to the source.

• Earthing is primarily for safety purposes, while neutral is for the proper functioning of...read more

IOT stands for Internet of Things, Cloud computing is a technology that allows access to data and applications over the internet, Flip-flops are digital circuits used in electronics.

• IOT (Internet of Things) refers to the network of physical devices connected to the internet, enabling them to collect and exchange data.

• Cloud computing involves storing and accessing data and programs over the internet instead of a computer's hard drive.

• Flip-flops are digital circuits used to sto...read more

HPCL is a leading oil and gas company in India.

• Hindustan Petroleum Corporation Limited (HPCL) is a Navratna Central Public Sector Enterprise in India.

• It is a leading oil and gas company with a strong presence in refining, marketing, and distribution.

• HPCL operates two major refineries in Mumbai and Visakhapatnam, with a total refining capacity of over 18 million metric tonnes per annum.

• The company has a wide network of retail outlets and LPG distributors across the country.

• HPC...read more

DPC stands for Damp Proof Course. It is a barrier in a building to prevent moisture from rising through the walls.

• DPC is usually made of materials like bitumen, plastic sheets, or metal strips.

• The quantity of DPC required is calculated based on the length and width of the walls where it needs to be installed.

• The thickness of the DPC also plays a role in determining the quantity needed.

• For example, if a wall is 10 meters long and the DPC needs to be 150mm thick, the quantity r...read more

We are manufacturing electronic devices for home and office use.

• Our products include smart home devices, routers, and modems.

• We focus on creating user-friendly and efficient products.

• Our devices are designed to improve connectivity and productivity.

• Examples of our products include smart thermostats, wireless speakers, and network extenders.

Stress happens before strain.

• Stress is the force applied to an object, while strain is the deformation that results from that force.

• Stress causes strain, so stress must happen first.

• For example, if you pull on a rubber band, the stress you apply causes the rubber band to stretch, which is the strain.

• In engineering, stress and strain are important concepts for designing structures that can withstand external forces.

The Russia-Ukraine war can have a negative impact on the Indian economy due to rising oil prices, disruptions in trade, and geopolitical tensions.

• Rising oil prices due to supply disruptions from Russia, a major oil exporter

• Disruptions in trade with both Russia and Ukraine, affecting imports and exports

• Geopolitical tensions leading to uncertainty in global markets and investment decisions

There are several types of welding, including arc welding, MIG welding, TIG welding, and spot welding.

• Arc welding uses an electric arc to create heat and join metals.

• MIG welding uses a wire electrode and a shielding gas to create a weld.

• TIG welding uses a tungsten electrode and a separate filler material.

• Spot welding is used to join two or more metal sheets together at specific points.

Different types of welding include MIG, TIG, Stick, and Flux-Cored welding, each with unique applications.

• MIG welding is commonly used for automotive and construction applications.

• TIG welding is often used for precision work on thin materials like aluminum.

• Stick welding is a versatile method used for welding thicker materials in outdoor environments.

• Flux-Cored welding is ideal for welding in windy or dirty conditions.

Forging is a process of shaping metal by applying compressive force. Different types of forging are used for different applications.

• Open-die forging: used for large parts like shafts and cylinders

• Closed-die forging: used for small parts like bolts and fittings

• Roll forging: used for long parts like rails and bars

• Impression-die forging: used for complex shapes like gears and engine parts

• Precision forging: used for high-precision parts like aerospace components

Mass transfer is the movement of substances from one place to another due to a concentration gradient.

• Mass transfer involves the transfer of mass or substances, such as molecules or ions, from one phase to another.

• It occurs due to a difference in concentration or partial pressure between the two phases.

• Examples of mass transfer include the diffusion of gases in air, the movement of solutes in a liquid, and the evaporation of a liquid into a gas.

• Mass transfer is important in v...read more

Centrifugal pumps are devices that use centrifugal force to move fluids through a system.

• Centrifugal pumps are commonly used in industries such as oil and gas, water treatment, and chemical processing.

• They consist of an impeller that rotates to create centrifugal force, which pushes the fluid towards the pump outlet.

• The fluid enters the pump through the suction inlet and is accelerated by the impeller.

• The kinetic energy of the fluid is then converted into pressure energy as i...read more

Vaccum distillation is a process that separates liquids based on their boiling points under reduced pressure.

• Vaccum distillation is used to purify liquids with high boiling points or heat-sensitive compounds.

• It involves heating the liquid in a distillation flask under reduced pressure to lower its boiling point.

• The reduced pressure allows the liquid to vaporize at a lower temperature, preventing thermal degradation.

• The vapor is then condensed and collected as a purified liqui...read more

Hooke's law states that the force needed to extend or compress a spring by a certain distance is proportional to that distance.

• Hooke's law is a principle of physics that states the force needed to extend or compress a spring by a certain distance is directly proportional to that distance.

• The formula for Hooke's law is F = kx, where F is the force applied, k is the spring constant, and x is the displacement of the spring from its equilibrium position.

• Hooke's law is used in var...read more

A venturi is a device used to measure the flow rate of a fluid by creating a pressure difference.

• A venturi consists of a narrow throat section and wider inlet and outlet sections.

• As fluid flows through the venturi, its velocity increases in the narrow throat, causing a decrease in pressure.

• The pressure difference is measured and used to calculate the flow rate of the fluid.

• Venturis are commonly used in industries such as HVAC, water treatment, and automotive.

• For example, a ve...read more

Antenna signals refer to electromagnetic waves transmitted and received by antennas for communication purposes.

• Antenna signals are used to transmit and receive information wirelessly.

• They can be used for various purposes such as radio broadcasting, television broadcasting, cellular communication, and satellite communication.

• Different types of antennas are used for different applications, such as dipole antennas, parabolic antennas, and Yagi antennas.

• Antenna signals can be aff...read more