Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
procedure of extinguishing flames that the have engulfed a person
Assess the situation: The first step is to assess the severity of the situation and determine if it is safe to approach the person. If the flames are small and the person is able to move, they should be encouraged to move away from the source of the flames and seek help. If the flames are large or tRead more
- Assess the situation: The first step is to assess the severity of the situation and determine if it is safe to approach the person. If the flames are small and the person is able to move, they should be encouraged to move away from the source of the flames and seek help. If the flames are large or the person is unable to move, they may require immediate assistance to extinguish the flames.
- Call for help: If the flames are large or the person is unable to move, it is important to call for help as soon as possible. This may include calling emergency services, such as the fire department or the police, or alerting others who can assist with the extinguishment.
- Remove the source of the flames: If possible, the source of the flames should be removed or extinguished to stop the fire from spreading. This may involve turning off a gas stove, unplugging an electrical appliance, or extinguishing a burning candle or lighter.
- Extinguish the flames: The flames should be extinguished as quickly as possible to prevent further injury to the person. This can be done using a fire extinguisher, a bucket of water, a blanket, or other materials that are available. It is important to cover the entire body of the person to ensure that all of the flames are extinguished.
- Seek medical attention: After the flames have been extinguished, it is important to seek medical attention for the person as soon as possible. They may have suffered burns or other injuries that require treatment.
See lesssafety precautions observed when sharpening cutting tools on a grinding wheel.
Wear protective equipment: It is important to wear appropriate protective equipment, such as safety glasses, gloves, and a face shield, to protect against injuries from flying chips or debris, as well as from contact with the grinding wheel. Secure the tool: The cutting tool should be securely clampRead more
- Wear protective equipment: It is important to wear appropriate protective equipment, such as safety glasses, gloves, and a face shield, to protect against injuries from flying chips or debris, as well as from contact with the grinding wheel.
- Secure the tool: The cutting tool should be securely clamped or held in place to prevent it from moving or shifting during the sharpening process. This will help to ensure a precise and accurate edge, and will also help to prevent accidents or injuries.
- Check the grinding wheel: The grinding wheel should be checked for damage or defects before use, and any damaged or defective wheels should be replaced. The wheel should also be tightened securely on the spindle to prevent it from slipping or coming loose during the sharpening process.
- Use proper technique: When sharpening the cutting tool, it is important to use proper technique, such as applying even and steady pressure and making smooth and continuous passes. This will help to prevent the tool from overheating or becoming damaged, and will also help to ensure a clean and accurate edge.
See lessmachines used in sheet metal fabrication
Shearing machine: A shearing machine is used to cut sheet metal into precise shapes and sizes, using a blade that moves back and forth along a fixed path. Punching machine: A punching machine is used to punch holes or shapes in sheet metal, using a punch and a die. Bending machine: A bending machineRead more
- Shearing machine: A shearing machine is used to cut sheet metal into precise shapes and sizes, using a blade that moves back and forth along a fixed path.
- Punching machine: A punching machine is used to punch holes or shapes in sheet metal, using a punch and a die.
- Bending machine: A bending machine is used to bend sheet metal into various shapes, using a set of rollers or a press brake.
- Rolling machine: A rolling machine is used to roll sheet metal into cylinders or other curved shapes, using a set of rollers that apply pressure to the metal.
- Welding machine: A welding machine is used to join sheet metal parts together by melting and fusing the metal at the joint.
- Grinding machine: A grinding machine is used to remove excess material or to smooth and finish the surface of sheet metal parts, using an abrasive wheel or belt.
- Laser cutting machine: A laser cutting machine is used to cut sheet metal into precise shapes and sizes, using a laser beam to vaporize the metal.
See lessdistinguish between soft soldering and brazing
Temperature: Soft soldering typically involves the use of a filler metal with a melting point of below 400°C, while brazing involves the use of a filler metal with a melting point of above 450°C. Joint strength: Soft soldering typically produces a joint with lower strength than brazing, as the filleRead more
- Temperature: Soft soldering typically involves the use of a filler metal with a melting point of below 400°C, while brazing involves the use of a filler metal with a melting point of above 450°C.
- Joint strength: Soft soldering typically produces a joint with lower strength than brazing, as the filler metal has a lower melting point and is less able to withstand high stresses and loads. Brazing, on the other hand, produces a joint with higher strength, as the filler metal has a higher melting point and is able to form a stronger and more durable bond with the base metals.
- Base metal compatibility: Soft soldering can be used to join a wider range of base metals than brazing, as the lower melting point of the filler metal allows for a greater tolerance of differences in the melting points and expansion rates of the base metals. Brazing, on the other hand, requires that the base metals have a sufficiently high melting point and a similar expansion rate to avoid overheating and damage to the parts.
- Surface preparation: Both soft soldering and brazing require that the surfaces of the base metals be clean and properly prepared before the filler metal is applied. However, brazing typically requires more thorough surface preparation, as the higher melting point of the filler metal requires a more stable and secure bond with the base metals.
See lessdescribe the following metal joining processes: i. riveting ii. bolting.
i. Riveting is a metal joining process in which two or more metal parts are permanently joined together by the use of a rivet. A rivet is a cylindrical rod with a head at one end and a tail at the other end. To join the parts using riveting, the tail of the rivet is inserted through a hole in one ofRead more
i. Riveting is a metal joining process in which two or more metal parts are permanently joined together by the use of a rivet. A rivet is a cylindrical rod with a head at one end and a tail at the other end. To join the parts using riveting, the tail of the rivet is inserted through a hole in one of the parts and the head is formed on the other side, using a hammer or a rivet gun. The head of the rivet is then upset or deformed to secure the parts together. Riveting is a strong and durable method of joining metal parts, and it is often used in the construction of aircraft, ships, and other structures where high strength is required.
ii. Bolting is a metal joining process in which two or more metal parts are permanently joined together by the use of a bolt, a nut, and a washer. A bolt is a long, cylindrical rod with a thread at one end and a head at the other end. To join the parts using bolting, the bolt is inserted through a hole in one of the parts and the nut is tightened on the other side, using a wrench or a torque tool. The washer is placed between the parts to distribute the clamping force and to prevent damage to the parts. Bolting is a strong and reliable method of joining metal parts, and it is often used in the construction of machinery and other equipment where high strength and reliability are required.
See lesssafety precautions observed when cutting a work piece using a hacksaw blade
Wear protective equipment: It is important to wear appropriate protective equipment, such as safety glasses, gloves, and a protective apron, to protect against injuries from flying chips or debris, as well as from contact with the blade or the workpiece. Secure the workpiece: The workpiece should beRead more
- Wear protective equipment: It is important to wear appropriate protective equipment, such as safety glasses, gloves, and a protective apron, to protect against injuries from flying chips or debris, as well as from contact with the blade or the workpiece.
- Secure the workpiece: The workpiece should be securely clamped or held in place to prevent it from moving or shifting during the cutting process. This will help to ensure a straight and accurate cut, and will also help to prevent accidents or injuries.
- Check the blade: The hacksaw blade should be checked for damage or defects before use, and any damaged or defective blades should be replaced. The blade should also be tightened securely in the frame to prevent it from slipping or coming loose during the cutting process.
- Use proper technique: When cutting the workpiece, it is important to use proper technique, such as applying even and steady pressure and making smooth and continuous cuts. This will help to prevent the blade from binding or breaking, and will also help to ensure a clean and accurate cut.
- Keep your hands and fingers away from the blade: It is important to keep your hands and fingers away from the blade at all times, as the blade can cause serious injuries if it comes into contact with your skin.
See lessstate three; i. categories of fits; ii. functions of a steel rule.
. There are three main categories of fits in mechanical engineering: clearance fits, transition fits, and interference fits. Clearance fits: Clearance fits are designed to allow a certain amount of clearance or space between the two parts that are being fitted together. This type of fit is used whenRead more
. There are three main categories of fits in mechanical engineering: clearance fits, transition fits, and interference fits.
ii. The functions of a steel rule include:
- Measuring: A steel rule is used to measure the dimensions of objects or materials, either in inches or in millimeters. It is commonly used to measure the width, length, or thickness of parts or products, and to check for dimensional accuracy or conformity to specified tolerances.
- Marking: A steel rule can also be used to mark lines or dimensions on materials or surfaces, either by hand or with the aid of a scribe or other marking tool.
- Straight edge: A steel rule can be used as a straight edge to check for straightness or flatness, or to guide the cutting or machining of materials.
- Scaling: A steel rule can be used to scale drawings or plans, either by measuring and transferring dimensions directly or by using a scale factor.
See lessdefine the term ‘tolerance’ with reference to workshop measurements.
tolerance refers to the allowable deviation from a specified dimension or standard. Tolerances are used to specify the acceptable range of variation in the dimensions of a part or product, and they are typically defined in terms of a maximum and minimum limit.
tolerance refers to the allowable deviation from a specified dimension or standard. Tolerances are used to specify the acceptable range of variation in the dimensions of a part or product, and they are typically defined in terms of a maximum and minimum limit.
See lessdescribe the functions of i. bed ii. headstock as used in lathe machine parts
i. The bed of a lathe machine is a long, horizontal beam that provides support for the workpiece and the other components of the lathe. It is typically made of a strong and durable material, such as cast iron, and is designed to withstand the forces and stresses of the machining process. The bed alsRead more
i. The bed of a lathe machine is a long, horizontal beam that provides support for the workpiece and the other components of the lathe. It is typically made of a strong and durable material, such as cast iron, and is designed to withstand the forces and stresses of the machining process. The bed also serves as a reference point for aligning and positioning the workpiece and the cutting tool.
ii. The headstock of a lathe machine is a housing that is mounted on the bed and contains the motor and gears that drive the spindle and chuck. The headstock is typically located at one end of the bed and is responsible for rotating the workpiece at a high speed during the machining process. It also contains the controls and indicators that are used to adjust the speed and direction of the spindle, as well as the feed and depth of the cutting tool. The headstock also typically houses the chuck, which is a device used to hold and secure the workpiece in place during the machining process.
See lessoutline two reasons for using a cutting fluid with high speed tools
Cooling: High speed tools generate a lot of heat during the cutting process, which can lead to overheating and damage to the tool and the workpiece. A cutting fluid helps to dissipate this heat and cool the tool and workpiece, which can improve the tool's performance and extend its life. LubricationRead more
- Cooling: High speed tools generate a lot of heat during the cutting process, which can lead to overheating and damage to the tool and the workpiece. A cutting fluid helps to dissipate this heat and cool the tool and workpiece, which can improve the tool’s performance and extend its life.
- Lubrication: A cutting fluid can also provide lubrication to the tool and workpiece, which can reduce the friction and wear that occurs during the cutting process. This can help to improve the tool’s performance and extend its life, and can also improve the surface finish of the workpiece.
- Chip control: A cutting fluid can help to control the chips that are generated during the cutting process, which can make the process cleaner and more efficient. It can also help to reduce the risk of chips becoming stuck in the cutting tool or workpiece, which can cause damage or reduce the tool’s performance.
- Corrosion prevention: A cutting fluid can help to prevent corrosion of the tool and workpiece during the cutting process, which can improve the tool’s performance and extend its life.
See less