20+ Infopro India Interview Questions and Answers

Underground working in mining involves the use of blasting systems, support systems, and ventilation.

• Underground working in mining is done through the use of tunnels and shafts.

• Blasting systems are used to break up the rock and extract the desired minerals.

• Support systems such as rock bolts, shotcrete, and steel arches are used to ensure the stability of the underground workings.

• Ventilation systems are crucial for providing fresh air, removing dust and gases, and maintaining ...read more

Explaining blast output calculation and powder factor calculation.

• Blast output calculation involves determining the amount of material moved during a blast.

• Powder factor calculation involves determining the amount of explosive needed to move a certain amount of material.

• Blast output calculation can be done using the formula: Volume of material moved = hole volume x burden x spacing x number of holes.

• Powder factor calculation can be done using the formula: Powder factor = mass...read more

Gases like carbon monoxide and nitrogen oxides are present from blasting and are handled through ventilation and monitoring.

• Gases are produced during blasting due to the combustion of explosives.

• Carbon monoxide and nitrogen oxides are the most common gases produced.

• These gases can be harmful to humans and the environment.

• Ventilation systems are used to remove the gases from the mine.

• Monitoring systems are used to detect the presence of gases and ensure safe levels.

• Personal pr...read more

Correct temperature indication by RTD can be verified using multimeter.

• Check the resistance value of RTD using multimeter and compare it with the standard resistance-temperature chart.

• Ensure that the RTD is properly connected to the measuring instrument and there are no loose connections.

• Perform a calibration check periodically to ensure accurate temperature measurement.

• Use a reference thermometer to cross-check the temperature reading.

• Verify the RTD for any physical damage o...read more

The power pack position for longwall mining face should be strategically located for efficient operation.

• The power pack should be located near the longwall face to minimize the length of hydraulic hoses and electrical cables.

• It should be positioned in a safe and accessible location for maintenance and repair.

• The power pack should be designed to withstand the harsh mining environment, including dust and moisture.

• The layout should be optimized for efficient operation, with clea...read more

Bord and pillar mining percentage of extraction refers to the amount of coal or ore that can be extracted from a given area using this method.

• The percentage of extraction in bord and pillar mining can vary depending on factors such as the size of the pillars left behind, the thickness of the seam being mined, and the equipment used.

• In general, the percentage of extraction for coal using bord and pillar mining ranges from 40% to 60%, while for ore it can be as high as 80%.

• Fact...read more

Increase in 1% moisture in boiler furnace leads to decrease in efficiency.

• Moisture in fuel leads to incomplete combustion and heat loss.

• Efficiency can decrease by 0.5-1% for every 1% increase in moisture.

• Regular maintenance and monitoring can prevent excessive moisture in furnace.

RTD measures temperature using resistance while thermocouple uses voltage difference.

• RTD has higher accuracy and stability than thermocouple.

• RTD is more expensive than thermocouple.

• RTD is suitable for precise temperature measurement while thermocouple is better for high temperature measurement.

• RTD has a linear relationship between resistance and temperature while thermocouple has a non-linear relationship.

• Examples of RTD include platinum, nickel, and copper while examples of ...read more

Mining is the process of extracting valuable minerals or other geological materials from the earth's surface or underground.

• Mining is done to obtain various resources such as coal, gold, diamonds, and metals like iron, copper, and aluminum.

• It involves the removal of soil, rocks, and other materials to access the desired minerals.

• Mining can be categorized into surface mining and underground mining, depending on the location of the resources.

• Surface mining methods include open-...read more

There are various types of gauges used in different industries for measuring different parameters.

• Types of gauges include pressure gauges, temperature gauges, fuel gauges, thread gauges, and bore gauges.

• Each type of gauge is designed for specific measurement purposes.

• Gauges can be analog or digital depending on the application.

• Some common examples include micrometers, calipers, dial indicators, and depth gauges.

Coal contains various components including carbon, sulfur, hydrogen, oxygen, and nitrogen.

• Coal is primarily composed of carbon, which makes up about 60-80% of its total weight.

• Sulfur is another common component found in coal, which can contribute to air pollution when burned.

• Coal also contains varying amounts of hydrogen, oxygen, and nitrogen, which can affect its energy content and burning characteristics.

• Trace elements such as arsenic, mercury, and lead may also be present ...read more

Dry wiring refers to wiring without any external protection, while wet wiring involves the use of protective coatings or materials.

• Dry wiring is typically used in low-risk environments where there is no chance of moisture or other contaminants damaging the wiring.

• Wet wiring is used in high-risk environments where moisture or other contaminants are present, such as in chemical plants or outdoor installations.

• Examples of wet wiring materials include heat shrink tubing, silicone...read more

Slugging and fauling are terms used in coal handling. Slugging refers to the formation of lumps in coal, while fauling refers to the accumulation of fine coal dust.

• Slugging occurs when coal particles stick together due to moisture or other factors, forming large lumps that can clog coal handling equipment.

• Fauling occurs when fine coal dust accumulates in the air and settles on surfaces, creating a potential fire hazard.

• Both slugging and fauling can cause problems in coal hand...read more

Nonel is a type of non-electric initiation system used in blasting operations to detonate explosives.

• Nonel is used in mining, construction, and demolition industries.

• It is a safe and reliable method of initiating explosives without the need for electricity.

• Nonel consists of a shock tube filled with a small amount of explosive material that is initiated by a blasting cap.

• It allows for precise timing and sequencing of blasts, improving safety and efficiency.

• Nonel is commonly us...read more

There are various types of boilers used in boiler combustion, including fire-tube boilers, water-tube boilers, and electric boilers.

• Fire-tube boilers: These boilers have hot gases flowing through tubes surrounded by water. They are commonly used in small-scale applications.

• Water-tube boilers: These boilers have water flowing through tubes surrounded by hot gases. They are commonly used in large-scale industrial applications.

• Electric boilers: These boilers use electricity to g...read more

Safety means ensuring the well-being and protection of individuals from harm or danger.

• Safety involves implementing measures to prevent accidents and injuries.

• It includes following protocols and guidelines to minimize risks.

• Safety also encompasses creating a culture of awareness and accountability.

• Examples: wearing personal protective equipment, conducting regular safety inspections, providing proper training.

Yes, 0-10 V can be used in PLC as an analog input or output signal.

• PLCs typically have analog input and output modules that can handle 0-10 V signals.

• The signal can be used to measure or control variables such as temperature, pressure, or flow.

• The resolution and accuracy of the signal depend on the PLC and the analog module used.

• Some PLCs may require additional scaling or conversion of the signal to match the desired range or units.

• Examples of PLCs that can use 0-10 V signals...read more

Steam pressure in a boiler is used to generate power and heat.

• Steam pressure is used to drive turbines and generate electricity.

• It is also used to provide heat for various industrial processes.

• Higher steam pressure results in increased energy output.

• Steam pressure is controlled and regulated to ensure safe and efficient operation of the boiler.

• Examples of boilers that utilize steam pressure include power plants, refineries, and manufacturing facilities.

Heat exchangers are devices used to transfer heat between two or more fluids.

• Design considerations include heat transfer area, fluid flow rates, temperature differences, and material selection.

• Parameters to consider include heat transfer coefficient, pressure drop, fouling factor, and overall efficiency.

• Different types of heat exchangers include shell and tube, plate and frame, and finned tube.

• Examples of heat exchanger applications include HVAC systems, refrigeration units, ...read more

Amazon's business strategy is to be the most customer-centric company in the world.

• Customer obsession

• Continuous innovation

• Operational excellence

• Long-term thinking

• Expansion into new markets and industries

A fitter is a skilled worker who assembles, installs, and maintains machinery and equipment.

• Fitters use hand tools and power tools to assemble parts according to blueprints or specifications

• They may also be responsible for troubleshooting and repairing machinery

• Examples of fitters include pipefitters, millwrights, and machinery maintenance workers

Entries in accounts refer to the recording of financial transactions in the company's books.

• Entries in accounts include recording revenue, expenses, assets, and liabilities.

• Each entry should include the date, description, and amount of the transaction.

• Examples of entries in accounts include sales revenue, rent expenses, equipment purchases, and loan repayments.

There is no known meaning for the acronym fbpb.

• There is no context provided for the acronym fbpb, making it impossible to determine its meaning.

• It is important to provide context when using acronyms to avoid confusion.

• If the acronym fbpb is specific to a certain industry or organization, it may have a unique meaning within that context.