20+ Jwala Associates Interview Questions and Answers

Helical gearboxes are commonly used in the steel industry.

• Helical gearboxes are preferred in the steel industry due to their high efficiency and smooth operation.

• These gearboxes provide better load distribution and reduce noise and vibration.

• They are capable of handling heavy loads and high torque requirements.

• Helical gearboxes are commonly used in steel rolling mills, steel processing plants, and other steel manufacturing equipment.

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 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

Hydraulics is a branch of engineering that deals with the mechanical properties of liquids, especially water or oil, and their applications.

• Hydraulics involves the study of fluid mechanics and the behavior of liquids under pressure.

• It is used in various applications such as hydraulic machinery, hydraulic systems, and hydraulic power transmission.

• Hydraulic systems use fluid pressure to generate, control, and transmit power.

• Examples of hydraulic systems include hydraulic lifts,...read more

Servo valve nas value refers to the National Aerospace Standard (NAS) specification for servo valves.

• NAS value is a standard that defines the performance and quality requirements for servo valves used in aerospace applications.

• It ensures that servo valves meet specific criteria for reliability, accuracy, and durability.

• NAS value is often used as a reference when selecting or evaluating servo valves for aerospace systems.

• The NAS value may include parameters such as flow rate, ...read more

Check in bearing is a type of bearing that allows axial movement while preventing radial movement.

• Check in bearing is designed to accommodate axial loads.

• It allows movement in one direction while preventing movement in the opposite direction.

• This type of bearing is commonly used in applications where axial displacement is required, such as in automotive suspensions.

• An example of a check in bearing is a thrust bearing used in a gearbox to support axial loads.

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 die using a hollow ram.

• Impact extrusion presses use a pun...read more

Blank endorsement on bill of lading allows for transfer of ownership.

• Blank endorsement means the holder of the bill of lading can transfer ownership to another party.

• It is commonly used in international trade to facilitate the transfer of goods.

• The blank endorsement allows the new holder to take possession of the goods without the need for a new bill of lading.

• It also allows for easier financing of the goods as the bill of lading can be used as collateral.

• However, it also car...read more

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 are used for drilling tough materials like concrete and ma...read more

Control valves are used to regulate the flow, pressure, temperature, or level of a fluid in a system.

• There are several types of control valves, including globe valves, butterfly valves, ball valves, and plug valves.

• Globe valves are commonly used for throttling and regulating flow.

• Butterfly valves are often used for large flow rates and low-pressure applications.

• Ball valves provide quick shut-off and are suitable for on/off control.

• Plug valves are used for applications requiri...read more

Incoterms are standard trade definitions used in international trade to define the responsibilities of buyers and sellers.

• There are 11 Incoterms in total

• They are divided into four categories: E, F, C, and D

• E terms are for use when the seller is responsible for the goods only until they are made available at the seller's premises

• F terms are for use when the seller is responsible for the goods until they are loaded onto a means of transport

• C terms are for use when the seller is...read more

Types of letter of credit in international trade

• There are various types of letter of credit (LC) used in international trade such as commercial LC, standby LC, revolving LC, transferable LC, back-to-back LC, red clause LC, green clause LC, and direct pay LC.

• Commercial LC is used for payment of goods and services, standby LC is used as a backup in case of default, revolving LC is used for multiple shipments, transferable LC allows the beneficiary to transfer the credit to anot...read more

Lubricant use in wire rope reduces friction, prevents corrosion, and extends the lifespan of the rope.

• Lubricants help reduce friction between the wires in the rope, allowing for smoother operation.

• They also help prevent corrosion by creating a protective barrier against moisture and other corrosive elements.

• Regular lubrication can extend the lifespan of the wire rope by reducing wear and tear on the individual wires.

• Different types of lubricants, such as dry film lubricants o...read more

Aluminium Extrusion press technical data includes specifications such as tonnage, billet size, speed, and power consumption.

• Tonnage refers to the force exerted by the press on the billet during extrusion.

• Billet size determines the maximum size of the extruded profile.

• Speed is the rate at which the billet is pushed through the die.

• Power consumption is the amount of energy required to operate the press.

• Other technical data may include the type of heating system, cooling system,...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

Third angle projection is commonly used in India for engineering drawings.

• Third angle projection is the standard method used in India for representing 3D objects on 2D surfaces.

• In third angle projection, the object is imagined to be in the third quadrant (behind the viewing planes).

• This method is widely taught in engineering colleges and used in industries across India.

• It is important for machine maintenance engineers to be familiar with third angle projection for interpretin...read more

A diesel engine is a type of internal combustion engine that uses compression ignition to burn fuel.

• Diesel engines are commonly used in trucks, buses, and some cars.

• They are more fuel efficient than gasoline engines.

• Diesel engines have higher torque output compared to gasoline engines.

• They do not have spark plugs, instead relying on compression to ignite the fuel.

• Diesel engines are known for their durability and longevity.

A hydraulic system is a technology that uses liquid to transmit power.

• Uses incompressible fluid to generate power

• Consists of a pump, valves, cylinders, and hydraulic fluid

• Commonly used in heavy machinery like excavators and cranes

A 4-stroke engine is an internal combustion engine that completes four separate strokes in the combustion cycle: intake, compression, power, and exhaust.

• 4-stroke engines are commonly used in automobiles, motorcycles, and small engines like lawnmowers.

• They are more fuel-efficient and produce less pollution compared to 2-stroke engines.

• Examples of vehicles with 4-stroke engines include cars, trucks, and SUVs.

Thermal power is the energy generated from heat, typically through the combustion of fossil fuels or nuclear reactions.

• Thermal power plants use steam turbines to convert heat energy into mechanical energy

• Common sources of thermal power include coal, natural gas, and nuclear fuel

• Thermal power generation can contribute to air pollution and greenhouse gas emissions

4-stroke engine is a type of internal combustion engine commonly used in vehicles and machinery.

• 4-stroke engines have four stages: intake, compression, power, and exhaust.

• They are more fuel efficient and produce less emissions compared to 2-stroke engines.

• Examples of vehicles with 4-stroke engines include cars, motorcycles, and trucks.

The process involves planning, executing, and monitoring activities to achieve a specific goal or outcome.

• Identify the goal or outcome to be achieved

• Create a plan outlining the steps and resources needed

• Execute the plan by carrying out the activities

• Monitor progress and make adjustments as needed

• Evaluate the results to determine success or areas for improvement

CNC machines can have 2, 3, 4, or 5 axes depending on the complexity of the machine.

• CNC machines can have 2 axes for simple operations like drilling and cutting along two axes.

• 3-axis CNC machines can move along three axes (X, Y, Z) allowing for more complex operations like milling.

• 4-axis CNC machines have an additional rotary axis, enabling the cutting tool to rotate and move along four axes.

• 5-axis CNC machines have two additional rotary axes, providing even more flexibility ...read more

Hydraulics is a branch of science and engineering that deals with the mechanical properties of liquids, especially water.

• Hydraulics involves the study of fluid mechanics and the behavior of liquids under pressure.

• It is used in various applications such as hydraulic systems in machinery, vehicles, and aircraft.

• Hydraulic systems use fluid power to generate, control, and transmit forces and motion.

• Examples include hydraulic brakes in cars, hydraulic lifts in buildings, and hydra...read more

Wire ropes are classified based on construction, material, and application.

• Classification based on construction: regular lay, lang lay, compacted, rotation resistant

• Classification based on material: steel, stainless steel, galvanized, synthetic fibers

• Classification based on application: general purpose, hoisting, mining, marine

• Example: Steel wire rope with regular lay construction used for hoisting applications

Grade of concrete refers to the strength of the concrete mix, typically denoted by a number.

• Grade of concrete is determined by the ratio of cement, sand, and aggregates in the mix.

• Common grades of concrete include M20, M25, and M30, with M representing mix and the number indicating strength in Newton per square millimeter.

• Higher grade concrete mixes have higher strength and are used for structural purposes.

• The grade of concrete required for a project depends on factors like l...read more