20+ Maths Unlimited Interview Questions and Answers

The thyristor value from gate to cathode in an induction furnace depends on the specific design and requirements of the furnace.

• The thyristor value is determined by the voltage and current ratings required for the induction furnace.

• It is important to select a thyristor with appropriate voltage and current handling capabilities to ensure reliable operation.

• The thyristor value may vary depending on the power rating and frequency of the induction furnace.

• Consulting the furnace's...read more

Over current in furnace is mainly caused by short circuits or overload.

• Short circuits

• Overload

• Faulty wiring

• Malfunctioning equipment

Transformers used in furnaces are mainly of two types - power transformers and isolation transformers.

• Power transformers are used to step down the high voltage power supply to a lower voltage suitable for the furnace.

• Isolation transformers are used to isolate the furnace from the power supply to prevent electrical interference.

• Other types of transformers used in furnaces include control transformers and potential transformers.

• Control transformers are used to power the control...read more

Slip ring motor has external connections for rotor winding while 3 phase induction motor has a squirrel cage rotor.

• Slip ring motor has external connections for rotor winding, allowing for external control of rotor circuit.

• 3 phase induction motor has a squirrel cage rotor, which is simpler and more rugged.

• Slip ring motor is used in applications where variable speed control is required, such as cranes and hoists.

• 3 phase induction motor is commonly used in industrial application...read more

Hydraulic systems use liquid to transmit power, while pneumatic systems use compressed air.

• Hydraulic systems use incompressible fluids like oil or water, while pneumatic systems use compressed air or gas.

• Hydraulic systems can generate higher forces and are used in heavy machinery like cranes and excavators.

• Pneumatic systems are lighter and more flexible, commonly used in applications like air brakes in vehicles.

• Hydraulic systems are generally more expensive and require more m...read more

I have faced various hydraulic breakdowns in my career as a Mechanical Maintenance Engineer.

• One common hydraulic breakdown is a leak in the hydraulic system, which can be caused by worn-out seals or damaged hoses.

• Another issue is a hydraulic pump failure, which can occur due to excessive wear and tear or lack of proper maintenance.

• Clogged or blocked hydraulic filters can also lead to breakdowns, as they restrict the flow of hydraulic fluid.

• Problems with hydraulic valves, such...read more

Absenteeism can be controlled through various measures such as implementing flexible work schedules, offering incentives for good attendance, and providing a supportive work environment.

• Implement flexible work schedules to accommodate employees' personal needs

• Offer incentives for good attendance such as bonus or extra paid time off

• Provide a supportive work environment where employees feel valued and motivated to come to work

• Track and monitor absenteeism rates to identify patt...read more

Roll cost refers to the expenses associated with the production of rolls, typically in manufacturing or printing industries.

• Roll cost includes the cost of raw materials, labor, equipment, and overhead expenses involved in the production process.

• For example, in a paper manufacturing company, roll cost would include the cost of wood pulp, energy consumption, machine maintenance, and labor wages.

• Roll cost analysis helps in determining the profitability of producing rolls and opt...read more

Gear, pulley, belt drive, and chain are mechanical components used to transmit motion and power between rotating shafts.

• Gear: Toothed wheel that meshes with another gear to transmit motion.

• Pulley: Wheel with a grooved rim used with a belt to transmit power.

• Belt drive: System of belts and pulleys used to transfer power between shafts.

• Chain: Series of connected links used to transmit motion and power.

• Examples: Gear trains in machinery, pulley systems in elevators, belt drives i...read more

Chemistry 304 and 316 are grades of stainless steel commonly used in various industries.

• 304 stainless steel is a versatile and widely used grade known for its corrosion resistance and durability.

• 316 stainless steel is also corrosion-resistant and has added molybdenum for improved resistance to pitting and crevice corrosion.

• Both grades are commonly used in food processing, pharmaceutical, and chemical industries.

• 304 stainless steel is more affordable than 316, but 316 is often...read more

Attrition can be controlled by improving employee engagement, offering competitive compensation, providing growth opportunities, and conducting exit interviews.

• Improve employee engagement through regular feedback, recognition programs, and career development opportunities.

• Offer competitive compensation and benefits to retain top talent.

• Provide growth opportunities such as training programs, promotions, and cross-functional projects.

• Conduct exit interviews to understand the re...read more

GSTR-3B is a monthly self-declaration that summarizes all the GST liabilities of a taxpayer.

• GSTR-3B is a summary of all the GST liabilities of a taxpayer for a particular month.

• It includes details of both inward and outward supplies, input tax credit, and tax payable.

• It must be filed by the 20th of the following month.

• TDS stands for Tax Deducted at Source.

• It is a mechanism for collecting tax at the source of income.

• It is applicable to various types of payments such as salary,...read more

Chock overhauling is a process of inspecting, repairing, and maintaining chocks used in various engineering applications.

• Chock overhauling involves disassembling the chock to inspect its components for wear and damage.

• Any worn or damaged parts are repaired or replaced to ensure proper functioning.

• The chock is then reassembled and tested to ensure it meets the required specifications.

• Regular chock overhauling helps prevent breakdowns and ensures the longevity of the equipment....read more

A petrol engine works by igniting a mixture of fuel and air inside a cylinder to create a controlled explosion that powers the engine.

• Fuel and air are mixed in the carburetor or fuel injection system

• The mixture is compressed by a piston inside a cylinder

• A spark plug ignites the mixture, causing a controlled explosion

• The explosion pushes the piston down, which turns the crankshaft and powers the engine

• The exhaust gases are expelled through the exhaust system

To check the motor, you can perform various tests and inspections to ensure it is functioning properly.

• Check for any physical damage or wear on the motor casing

• Inspect the wiring connections for any loose or damaged wires

• Measure the voltage and current going into the motor to ensure it is within the specified range

• Test the motor's insulation resistance to check for any faults

• Run the motor under load to see if it operates smoothly and efficiently

Power analysis involves measuring and analyzing the electrical power consumption of a system or device.

• Identify the components of the system or device that consume power.

• Measure the current and voltage across these components using appropriate instruments.

• Calculate the power consumption using the formula P = VI, where P is power, V is voltage, and I is current.

• Analyze the power consumption data to identify any inefficiencies or areas for improvement.

• Consider factors such as p...read more

Diesel engines work by compressing air and fuel in a cylinder, causing combustion and driving a piston.

• Air is drawn into the cylinder and compressed by a piston.

• Fuel is injected into the cylinder and ignites due to the high temperature and pressure.

• The resulting explosion drives the piston, which turns the crankshaft and powers the engine.

• Diesel engines are commonly used in trucks, buses, and heavy equipment due to their high torque and fuel efficiency.

A thyristor is a semiconductor device that acts as a switch and can handle high voltages and currents.

• It has three terminals: anode, cathode, and gate

• It can be turned on by applying a small current to the gate terminal

• It can handle high power and is commonly used in power control applications

• Examples include AC motor speed control, lighting dimming, and power supplies

A transformer is a device that transfers electrical energy between two or more circuits through electromagnetic induction.

• Transformers are used to increase or decrease voltage levels in electrical circuits.

• They consist of two coils of wire, known as the primary and secondary coils.

• Examples of transformers include power transformers used in electrical substations and voltage transformers in electronic devices.

Motor analysis involves studying the performance, efficiency, and characteristics of electric motors.

• Motor analysis includes evaluating the electrical and mechanical properties of a motor.

• It involves testing the motor under different operating conditions to determine its efficiency and performance.

• Motor analysis helps in identifying any faults or issues in the motor and optimizing its operation.

• Common techniques used in motor analysis include vibration analysis, thermal imagi...read more

TDC stands for Test Design Specification, which outlines the test cases to be executed during testing.

• TDC is a document that details the test cases to be executed during testing.

• It includes information on the test case ID, description, test steps, expected results, and actual results.

• TDC helps ensure that all necessary test cases are executed and documented properly.

• It serves as a reference for testers to follow during the testing process.

• Example: A TDC may include test cases...read more

International trade refers to the exchange of goods and services between countries.

• Involves importing and exporting goods and services across borders

• Facilitates economic growth and development

• Influenced by factors such as tariffs, trade agreements, and currency exchange rates

• Examples include the export of automobiles from Japan to the United States, or the import of coffee from Brazil to Europe

Conference call connection process involves dialing into a designated number and entering a passcode to join the call.

• Dial the designated conference call number provided by the organizer

• Enter the passcode or access code when prompted

• Wait for the host to start the call or for other participants to join

• Mute your microphone when not speaking to avoid background noise

• Use headphones or earphones for better audio quality