Action Tesa Interview Questions, Process, and Tips for Freshers

Gears are mechanical devices that transmit power and motion between rotating shafts. There are various types of gears.

• Gears are toothed wheels that mesh with each other to transmit power and motion.

• They are used to change the speed, torque, and direction of rotation in machines.

• Common types of gears include spur gears, helical gears, bevel gears, worm gears, and rack and pinion gears.

• Spur gears have straight teeth and ...read more

Turbines are used to convert fluid energy into mechanical energy. There are various types of turbines.

• Types of turbines include steam turbines, gas turbines, and hydraulic turbines.

• Steam turbines are used in power plants to generate electricity by using steam to rotate the turbine blades.

• Gas turbines are commonly used in aircraft propulsion and power generation.

• Hydraulic turbines are used in hydroelectric power plants ...read more

A boiler is a closed vessel in which water or other fluid is heated to generate steam or hot water.

• Boilers are commonly used in industries for various purposes such as power generation, heating, and processing.

• They work by transferring heat from a fuel source to the water or fluid inside the boiler.

• The heated water or fluid then circulates through pipes or tubes to provide heat or generate steam.

• Boilers can be classifi...read more

Production is the process of creating goods or services, while manufacturing is the process of making physical products.

• Production involves both goods and services, while manufacturing is limited to physical products.

• Production is a broader term that includes manufacturing as a subset.

• Manufacturing involves the use of machinery and tools to create physical products.

• Production can be done manually or with the help of ma...read more

Casting is a manufacturing process where a liquid material is poured into a mold and allowed to solidify. Types of welding include MIG, TIG, and stick welding. Runners and risers are components of the casting process.

• Casting involves pouring a liquid material into a mold and allowing it to solidify

• Types of welding include MIG, TIG, and stick welding

• Runners are channels that allow the molten material to flow into the mo...read more

Gating system is a network of channels that delivers molten metal to the mold cavity during casting.

• It consists of sprue, runner, gates, and risers.

• Sprue is the main channel that connects the pouring basin to the runner.

• Runner is a channel that connects the sprue to the gates.

• Gates are openings in the mold cavity that control the flow of molten metal.

• Risers are reservoirs that provide additional molten metal to compens...read more

Casting and welding defects are common in production. Casting defects include porosity, shrinkage, and misruns. Welding defects include cracks, porosity, and incomplete fusion.

• Casting defects can be caused by improper mold design, incorrect pouring temperature, or inadequate cooling time.

• Porosity is a common casting defect caused by trapped gas in the molten metal.

• Shrinkage occurs when the metal cools and contracts, ca...read more

Allowances in casting refer to the additional dimensions added to the pattern to compensate for shrinkage and other factors during the casting process.

• Allowances are added to the pattern to ensure the final casting is the correct size and shape.

• Shrinkage allowance compensates for the reduction in size of the casting as it cools and solidifies.

• Draft allowance is added to the pattern to allow for easy removal from the mo...read more

2 stroke engines have simpler design and produce more power, but are less fuel efficient and emit more pollution than 4 stroke engines.

• 2 stroke engines complete a power cycle in one revolution of the crankshaft, while 4 stroke engines complete it in two revolutions

• 2 stroke engines have fewer moving parts and are lighter than 4 stroke engines

• 2 stroke engines produce more power per unit of displacement than 4 stroke engi...read more

No, petrol cannot be used in a diesel engine and vice versa due to differences in fuel properties and engine design.

• Petrol and diesel have different chemical compositions and ignition properties.

• Petrol engines use spark plugs to ignite the fuel-air mixture, while diesel engines rely on compression ignition.

• Using the wrong fuel can damage the engine and lead to poor performance or even engine failure.

• For example, using ...read more

Bearings are machine elements that reduce friction between moving parts.

• Plain bearings

• Rolling element bearings

• Jewel bearings

• Fluid bearings

• Magnetic bearings

CPM and PERT are project management techniques used to plan and schedule tasks.

• CPM stands for Critical Path Method and PERT stands for Program Evaluation and Review Technique.

• CPM is used for projects with known activity times, while PERT is used for projects with uncertain activity times.

• CPM uses a single time estimate for each activity, while PERT uses three time estimates (optimistic, pessimistic, and most likely) to...read more

Tig welding, rolling, milling, shaper and planer are all different manufacturing processes used in metalworking.

• Tig welding is a type of arc welding that uses a tungsten electrode to produce the weld.

• Rolling is a process of reducing the thickness of a metal sheet or plate by passing it through a set of rollers.

• Milling is a process of cutting and shaping metal using a rotating cutting tool.

• Shaper is a machine tool used ...read more

Jigs and fixtures are devices used to hold and guide workpieces during manufacturing processes.

• Jigs are used to guide and control the cutting or machining tools.

• Fixtures are used to hold the workpiece in place during the manufacturing process.

• They increase production efficiency and accuracy while reducing costs.

• Examples include drill jigs, welding fixtures, and assembly fixtures.