30+ Johnson Controls Interview Questions and Answers

Stitch cutting can be used to prevent distortion on longer products by cutting them into smaller sections and then removing the stitches after cooling.

• Distortion can occur on longer products during gas cutting.

• Stitch cutting involves cutting the product into smaller sections using stitches.

• After cooling or reaching normal temperature, the stitches are removed.

• This method helps to prevent distortion on the product.

• Examples of longer products that can benefit from stitch cuttin...read more

Hanging and slipping are two common issues in technical work. Learn how to tackle them effectively.

• Hanging refers to a situation where a program or system stops responding or freezes.

• Slipping refers to a situation where a program or system runs slower than expected.

• To tackle hanging, try restarting the program or system, or checking for any updates or patches.

• To tackle slipping, try optimizing the program or system, or upgrading hardware if necessary.

To avoid distortion while gas cutting steel, measures like preheating, using proper cutting speed, and cooling are adopted.

• Preheating the steel before cutting to reduce thermal shock

• Using proper cutting speed to prevent excessive heat buildup

• Cooling the steel after cutting to prevent warping

• Using a jig or fixture to hold the steel in place during cutting

• Using a smaller cutting torch tip to reduce heat input

• Using a back purge to prevent oxidation and reduce heat input

Despite the current loss, I believe in the potential of the iron and steel sector to bounce back and contribute to the economy.

• I am passionate about the technical aspects of the iron and steel sector

• I have researched the current market trends and believe that with the right strategies, the sector can recover

• I am excited about the opportunity to be a part of the solution and contribute to the growth of the sector

• I am confident in my ability to learn and adapt to the challenges...read more

The blending mixture of coal for Met coke making depends on the quality of coal and the desired coke properties.

• The blending mixture is determined by the quality of coal available.

• The desired coke properties also play a role in determining the blending mixture.

• The blending mixture typically includes a combination of coking coal, anthracite coal, and other additives.

• The ratio of each component in the blending mixture can vary depending on the specific requirements.

• For example,...read more

The chip relieving angle is the angle between the cutting edge of a tool and the surface of the workpiece.

• The chip relieving angle is important in machining operations as it affects the chip formation and evacuation.

• A larger chip relieving angle allows for better chip flow and reduces the chances of chip clogging or built-up edge.

• Different materials and cutting conditions may require different chip relieving angles for optimal performance.

• For example, in turning operations, a...read more

Hot blast stoves preheat air before it enters the blast furnace. Efficiency can be improved by using waste heat recovery systems.

• Hot blast stoves preheat air to around 1200°C before it enters the blast furnace

• Efficiency can be improved by using waste heat recovery systems to recover heat from the stove exhaust gases

• Insulating the stove walls and using high-quality refractory materials can also improve efficiency

• Regular maintenance and cleaning of the stove can prevent heat lo...read more

We sell blast furnace slag as a byproduct to construction companies at market rates.

• Blast furnace slag is a byproduct of the steel-making process.

• We sell it to construction companies for use in cement and concrete production.

• The cost varies depending on market rates and demand.

• We ensure that the slag meets all necessary quality standards before selling it.

• We also explore potential new markets for the slag to maximize its value.

Efficiency of hot blast stoves can be increased by optimizing combustion, improving insulation, and reducing heat losses.

• Optimize combustion by using high-quality fuel and maintaining proper air-to-fuel ratio

• Improve insulation by using high-temperature refractory materials and insulating the stove walls

• Reduce heat losses by minimizing air leaks and using heat recovery systems

• Regular maintenance and cleaning of the stoves can also improve efficiency

• Implementing advanced contro...read more

Steps to take when furnace is getting chilled

• Check the fuel supply and adjust if necessary

• Inspect the burners and clean them if needed

• Check the thermostat and adjust the temperature settings

• Inspect the air filters and replace if dirty

• Check the insulation and repair any leaks

• Inspect the ductwork and repair any leaks

• Check the blower motor and lubricate if needed

The lip angle on a drill bit refers to the angle formed between the cutting edge of the drill bit and the surface of the material being drilled.

• The lip angle affects the cutting action and chip formation during drilling.

• A smaller lip angle provides a more aggressive cutting action, but may cause the drill bit to wander or chatter.

• A larger lip angle provides a more controlled cutting action, but may generate more heat.

• Common lip angles for drill bits range from 118 degrees to ...read more

Pitch circle diameter in spur gear is calculated using the formula: PCD = (Number of teeth / Diametral pitch)

• The pitch circle diameter (PCD) is the diameter of the imaginary circle that passes through the center of the gear teeth.

• To calculate the PCD, you need to know the number of teeth on the gear and the diametral pitch.

• The formula to calculate PCD is PCD = (Number of teeth / Diametral pitch).

• For example, if a gear has 20 teeth and the diametral pitch is 4, the PCD would b...read more

Forged steel is used for machine parts due to its superior strength, durability, and resistance to wear and tear.

• Forged steel has a higher tensile strength compared to other materials, making it ideal for heavy-duty machine parts.

• It has excellent toughness and impact resistance, ensuring the parts can withstand high loads and vibrations.

• Forged steel is highly resistant to wear and tear, reducing the need for frequent replacements.

• The forging process improves the grain structu...read more

The pitch of a thread refers to the distance between adjacent threads on a screw or bolt.

• Pitch is typically measured in millimeters or inches.

• It determines the tightness or looseness of the fit between the screw and the threaded hole.

• A finer pitch means more threads per unit length, resulting in a tighter fit.

• A coarser pitch means fewer threads per unit length, resulting in a looser fit.

• For example, a screw with a pitch of 1.5mm will have 1.5mm distance between each thread.

The formula for feed calculation in mechanical engineering is Feed = (Number of teeth on the cutter x RPM x Chip load)

• Feed is a crucial parameter in machining operations

• It determines the rate at which the cutting tool advances into the workpiece

• The formula for feed calculation involves the number of teeth on the cutter, RPM (revolutions per minute), and chip load

• Chip load refers to the thickness of the material removed by each tooth of the cutter in one revolution

• The feed rat...read more

Distortion during welding refers to the changes in shape or dimensions of the welded material caused by the heat and cooling processes.

• Distortion occurs due to the expansion and contraction of the material during welding.

• It can result in changes in the straightness, flatness, or angularity of the welded components.

• Distortion can be minimized by using proper welding techniques, such as preheating, controlling heat input, and using fixtures or clamps to hold the components in p...read more

To avoid distortion, proper design, material selection, and manufacturing processes should be followed.

• Use appropriate design techniques to minimize stress concentrations.

• Select materials with suitable mechanical properties to withstand applied loads.

• Ensure proper heat treatment and surface finishing to reduce residual stresses.

• Implement accurate manufacturing processes to maintain dimensional stability.

• Perform regular inspections and quality control measures to identify and ...read more

The proportion of steel to cement used in construction varies depending on the type of structure and design requirements.

• The proportion of steel to cement in construction is typically measured by weight or volume.

• In reinforced concrete structures, the ratio of steel to cement is usually around 1:10 to 1:20.

• For high-rise buildings or structures requiring greater strength, the ratio may be higher.

• The specific ratio will also depend on factors such as the type of cement, grade o...read more

India's current steel production capacity is around 140 million metric tons per year.

• India is the second largest steel producer in the world.

• The government has set a target of increasing the production capacity to 300 million metric tons by 2030.

• Major steel producers in India include Tata Steel, JSW Steel, and Steel Authority of India Limited (SAIL).

Motors are devices that convert electrical energy into mechanical energy. There are various types of motors.

• Motors are used in various applications such as industrial, automotive, and household appliances.

• Types of motors include DC motors, AC motors, stepper motors, and servo motors.

• DC motors are used in electric vehicles, robotics, and conveyor belts.

• AC motors are used in fans, pumps, and compressors.

• Stepper motors are used in printers, scanners, and CNC machines.

• Servo motor...read more

A steel plant is a facility where raw materials such as iron ore and coal are processed to produce steel.

• Steel plants typically consist of various units such as blast furnaces, steelmaking furnaces, and rolling mills.

• The process of steel production involves the extraction of iron from iron ore, which is then combined with carbon and other elements to create steel.

• Steel plants require large amounts of energy and water for their operations.

• They play a crucial role in the manufa...read more

The steel was prepared through a process called steelmaking, which involves melting iron ore and adding various alloys and elements.

• Steelmaking is the process of producing steel from iron ore.

• Iron ore is melted in a blast furnace to remove impurities and create molten iron.

• Various alloys and elements are added to the molten iron to achieve desired properties.

• The molten steel is then cast into different shapes or further processed for specific applications.

Magnetic particle test is a non-destructive testing method used to detect surface and near-surface flaws in ferromagnetic materials.

• The test involves magnetizing the component, applying magnetic particles to the surface, and inspecting for indications of defects.

• Defects such as cracks, laps, seams, and inclusions can be detected using this method.

• The test can be performed using either dry magnetic powder or wet fluorescent magnetic particles.

• It is commonly used in industries ...read more

Power plant engineering involves designing, constructing, and operating power plants to generate electricity.

• Involves designing power generation systems using various sources such as coal, natural gas, nuclear, or renewable energy

• Requires knowledge of thermodynamics, fluid mechanics, and electrical engineering

• Focuses on optimizing efficiency, reliability, and safety of power plants

• Examples include thermal power plants, hydroelectric plants, and solar power plants

Amplifiers are used in various applications to increase the amplitude of electrical signals.

• Amplifiers are used in audio systems to amplify sound signals.

• They are used in telecommunication systems to amplify and transmit signals over long distances.

• Amplifiers are used in medical equipment such as ultrasound machines and MRI scanners.

• They are used in scientific research to amplify weak signals for analysis.

• Amplifiers are used in power systems to increase the power of electrica...read more

Transformers are electrical devices that transfer energy from one circuit to another through electromagnetic induction.

• Transformers are used to increase or decrease the voltage of an alternating current (AC) power supply.

• They consist of two coils of wire, known as the primary and secondary coils, wrapped around a magnetic core.

• When an AC voltage is applied to the primary coil, it creates a magnetic field that induces a voltage in the secondary coil.

• Transformers are used in po...read more

Drive refers to the mechanism that powers a machine or device.

• Drive is the source of power that enables a machine or device to function.

• It can be electrical, mechanical, hydraulic, or pneumatic.

• Examples of drives include electric motors, internal combustion engines, and hydraulic pumps.

• The type of drive used depends on the application and the requirements of the machine or device.

The point angle of a centre punch is typically 90 degrees.

• The point angle is the angle between the two sides of the punch tip.

• A 90 degree point angle is the most common and versatile for general use.

• Different point angles can be used for specific applications, such as 60 degrees for softer materials.

• The point angle affects the size and shape of the indentation made by the punch.

A converter is a device that converts one form of energy to another.

• Converts electrical energy to mechanical energy in electric motors

• Converts AC to DC in power supplies

• Converts digital signals to analog signals in communication systems

The point angle of scriber is the angle between the two cutting edges of the scriber.

• The point angle is typically between 30 and 60 degrees.

• It affects the sharpness and durability of the scriber.

• A larger point angle will result in a stronger but less sharp scriber.

• A smaller point angle will result in a sharper but less durable scriber.

My favourite subject in my respected batch is Mathematics.

• I enjoy solving complex problems and equations.

• I find it fascinating how mathematical concepts can be applied in various fields.

• I have consistently performed well in Mathematics throughout my academic career.

Iron and steel making is a process of extracting iron from iron ore and converting it into steel through various methods.

• Iron ore is first mined and then processed to remove impurities and create iron concentrate.

• The iron concentrate is then smelted in a blast furnace to produce pig iron, which contains high amounts of carbon.

• Pig iron is further processed in a basic oxygen furnace or electric arc furnace to remove excess carbon and other impurities, resulting in steel.

• Various...read more

Mechanical engineering passion is the driving force that motivates individuals to innovate, design, and solve complex problems in the field of mechanical engineering.

• Passion for mechanical engineering involves a deep interest in understanding how things work and a desire to create new technologies.

• It drives individuals to constantly seek out new challenges and opportunities for growth within the field.

• Passionate mechanical engineers often spend their free time tinkering with ...read more

Heat treatment is a process used to alter the physical and sometimes chemical properties of a material through controlled heating and cooling.

• Heat treatment involves heating a material to a specific temperature, holding it at that temperature for a certain amount of time, and then cooling it at a controlled rate.

• The purpose of heat treatment is to improve the material's hardness, strength, toughness, ductility, and other properties.

• Common heat treatment processes include anne...read more

The steel industry is a crucial sector that produces steel for various applications such as construction, automotive, and manufacturing.

• Steel industry is highly cyclical and influenced by global economic trends.

• Major players in the steel industry include ArcelorMittal, Nippon Steel, and Baosteel.

• Technological advancements have led to the development of high-strength steel for lightweight applications.

• Steel industry faces challenges such as overcapacity, trade disputes, and en...read more

The laws of thermodynamics are fundamental principles that govern the behavior of energy and matter in the universe.

• First Law: Energy cannot be created or destroyed, only transferred or converted.

• Second Law: The entropy of a closed system will never decrease over time.

• Third Law: As temperature approaches absolute zero, the entropy of a system approaches a minimum value.

• Examples: A car engine converting fuel into motion follows the laws of thermodynamics.

• Examples: A cup of hot...read more