A voltage tester is a tool used to check if electrical circuits or components are live or carrying electrical current. It typically consists of two probes that are connected to a display or indicator, showing whether voltage is present. Voltage testers come in various types, including non-contact models, which detect voltage without touching the wires, and contact models, which require the probes to be placed on the circuit. These tools are commonly used in electrical work to ensure safety before working on wiring or electrical systems, helping to prevent accidents and electrical shock.

What is a "voltage tester"?

voltage tester

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A multimeter is a tool used to measure multiple electrical properties, such as voltage, current, and resistance, in electrical circuits. It typically has a digital or analog display and a set of probes that are connected to the circuit. Multimeters are versatile tools used by electricians and technicians to troubleshoot and diagnose electrical issues. They can check whether a circuit is functioning correctly, test batteries, or measure the continuity of wires.

What is a "multimeter"?

multimeter

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A circuit breaker finder is a tool used to locate the specific circuit breaker that controls a particular electrical outlet or appliance. It consists of two parts: a transmitter and a receiver. The transmitter is plugged into the outlet or connected to the electrical device, while the receiver is used to scan the circuit panel. The receiver detects the signal from the transmitter and helps identify which breaker is connected to the outlet or device. This tool is useful for safely and quickly shutting off power to a specific circuit without having to turn off breakers one by one.

What is a "circuit breaker finder"?

circuit breaker finder

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A megohmmeter is a tool used to measure the resistance of electrical insulation in cables, motors, or other electrical components. It applies a high voltage to the insulation and measures how much resistance is present, helping to identify any deterioration or faults in the insulation material. Megohmmeters are commonly used in electrical maintenance and testing to ensure that insulation is intact and safe, preventing potential electrical shorts or failures. The tool provides readings in megohms, indicating the effectiveness of the insulation in preventing current leakage.

What is a "megohmmeter"?

megohmmeter

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A circuit analyzer is a tool used to test and evaluate the condition of electrical circuits, outlets, and wiring. It checks for issues like incorrect wiring, grounding problems, and faulty connections in electrical systems. Circuit analyzers typically have a set of indicators, such as lights or a digital display, that show the results of the test. They are often used by electricians to ensure that circuits are properly installed and functioning safely. Some advanced models can also detect issues like voltage fluctuations and provide detailed readings for troubleshooting and diagnostics.

What is a "circuit analyzer"?

circuit analyzer

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tape measure

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A steel square, also called a framing square, is a flat, L-shaped tool used in construction and woodworking for measuring and marking right angles, as well as for layout and cutting tasks. It consists of two straight edges joined at a 90-degree angle, with one longer side called the blade and a shorter side called the tongue. The tool has measurement markings along both sides, allowing for precise measurements and angle calculations. Steel squares are commonly used for tasks like framing, roofing, and stair building, ensuring accuracy in creating straight and angled cuts.

What is a "steel square"?

steel square

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A wood moisture meter is a tool used to measure the amount of moisture inside wood. It helps determine if the wood is dry enough for construction, woodworking, or other uses, as excessive moisture can cause problems like warping or splitting. The meter usually has either pins that are inserted into the wood or a pinless sensor that scans the surface to provide a moisture reading. Wood moisture meters are widely used by carpenters, flooring installers, and furniture makers to ensure quality and durability in their work.

What is a "wood moisture meter"?

wood moisture meter

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A chalk line is a simple tool used to mark straight lines on surfaces for construction or woodworking tasks. It consists of a string coated with powdered chalk inside a case, which also serves as a reel. To use it, the string is stretched tightly across the surface and snapped, leaving a straight chalk mark. Chalk lines are helpful for creating guides for cutting, aligning materials, or laying out designs. They are commonly used on walls, floors, or boards where precise, straight markings are needed.

What is a "chalk line"?

chalk line

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An electrical meter is a device used to measure various electrical properties, such as voltage, current, resistance, or power consumption, in circuits or systems. It typically has a display to show readings and probes or clamps to connect to the electrical components being tested. Electrical meters are used by electricians and technicians for diagnosing problems, ensuring equipment is functioning correctly, and monitoring energy usage. Common types include multimeters, clamp meters, and watt meters, each designed for specific tasks, such as testing outlets, wires, or entire electrical systems.

What is an "electrical meter"?

electrical meter

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A yardstick is a straight measuring tool used to measure length or distance, typically up to three feet or one yard. It is made of wood, metal, or plastic and has markings for inches, feet, and sometimes centimeters. Yardsticks are commonly used in tasks like drawing straight lines, measuring fabric, or checking dimensions in construction, sewing, or crafts. Its sturdy, rigid design makes it suitable for measuring longer distances accurately and providing a reliable guide for marking straight edges.

What is a "yardstick"?

yardstick

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A stud finder is a tool used to locate wooden or metal studs behind walls. It helps identify the solid framing in a wall, making it easier to securely hang heavy objects like shelves, mirrors, or TVs. Stud finders work by detecting differences in density, magnetic fields, or electrical signals within the wall. They often have visual or audio indicators to show where a stud is located. This tool is commonly used in construction, carpentry, or home improvement projects to ensure proper fastening and prevent wall damage.

What is a "stud finder"?

stud finder

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level

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A sliding bevel is a tool used to measure and transfer angles. It consists of a handle with a metal blade that can be adjusted to any desired angle and locked into place. This tool is commonly used in carpentry, woodworking, and metalworking to set precise angles for cutting or joining materials. The sliding bevel allows users to replicate angles from one piece of work to another, making it essential for tasks that require accurate angle measurements, such as framing, trim work, and joinery.

What is a "sliding bevel"?

sliding bevel

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A laser level is a tool that projects a laser beam to create a straight line or plane of reference, helping to ensure accuracy in alignment and leveling. It is often used in construction, carpentry, and home improvement projects to mark or measure level surfaces or straight lines over long distances. Laser levels can be used for tasks like installing shelves, laying tiles, or building walls, providing a clear, visible guide for precise work. Some models are self-leveling, while others require manual adjustments, and they may include horizontal, vertical, or both types of laser beams.

What is a "laser level"?

laser level

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A spirit level is a tool used to check if a surface is perfectly horizontal or vertical. It consists of a straight bar with one or more liquid-filled vials containing air bubbles. When the bubble is centered in the vial, the surface is level or plumb. Spirit levels are commonly used in construction, carpentry, and other projects that require precise alignment. They come in various sizes, from small pocket versions to larger, more accurate models used for bigger tasks like building walls or laying floors.

What is a "spirit level"?

spirit level

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A torpedo level is a small, compact level tool used to check if a surface is perfectly horizontal or vertical in tight spaces. It is shaped like a small torpedo or rectangular prism and typically has one or two bubble vials, with one often set at a 90-degree angle to measure vertical surfaces. Many torpedo levels also have a vial set at a 45-degree angle, allowing for easy measurement of diagonal surfaces. Torpedo levels are commonly used in tasks like plumbing, electrical work, or installing appliances, where precision is needed but space is limited. Despite its size, it provides accurate measurements similar to larger levels.

What is a "torpedo level"?

torpedo level

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A box level is a type of level with a rectangular, box-like shape, designed for measuring horizontal and vertical surfaces. It typically features three bubble vials: one for checking horizontal alignment, one for vertical, and often a third set at a 45-degree angle for angled measurements. The box design makes it sturdy and durable, ideal for use in construction, carpentry, or other projects where precision and strength are required. Box levels are often larger than other types of levels, allowing for more accurate measurements over longer distances.

What is a "box level"?

box level

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A line level is a small, lightweight tool used to measure the level of a surface over a long distance. It consists of a bubble vial encased in a small frame that is hung on a string or wire. To use it, the string is stretched between two points, and the line level is positioned at the midpoint to ensure the line is level. It is commonly used for tasks like setting fences, leveling posts, or aligning garden structures, where long distances need to be measured for levelness. Despite its simplicity, it provides accurate results over a wide area.

What is a "line level"?

line level

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A digital level is an advanced tool used to measure the level or angle of a surface with high precision. It features an electronic display that shows the angle or alignment in degrees or as a percentage slope, making it easier to read than traditional bubble vials. Digital levels often have a built-in sensor that detects changes in alignment and can give more accurate results over longer distances. They are commonly used in construction, carpentry, and other projects where precise measurements are needed, offering added features like audio alerts and the ability to measure both horizontal and vertical surfaces.

What is a "digital level"?

digital level

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A transit level is a type of optical instrument used to measure horizontal and vertical angles with high precision. It consists of a telescope mounted on a tripod that can rotate horizontally and vertically. The instrument uses a spirit level to ensure the telescope is aligned properly, allowing the user to accurately measure and transfer levels over long distances. Transit levels are commonly used in construction, surveying, and engineering for tasks like establishing grades, measuring elevations, and mapping land. They offer greater accuracy than simpler levels and are ideal for large-scale projects.

What is a "transit level"?

transit level

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A clinometer is a tool used to measure angles of slope, elevation, or inclination of a surface. It works by using a liquid-filled vial or a digital sensor to determine the angle between the tool and a surface. Clinometers are commonly used in fields like surveying, forestry, and geology, as well as in construction and engineering to measure the steepness of slopes or the angle of structures. Some clinometers also have a built-in compass for measuring the direction of the slope. This tool helps ensure accurate measurements for tasks requiring precise angle determination.

What is a "clinometer"?

clinometer

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A machinist level is a highly precise tool used to measure the flatness or alignment of surfaces in metalworking and manufacturing tasks. It has a very fine, sensitive bubble vial that allows for extremely accurate measurements, often to fractions of a millimeter. Machinist levels are typically used for tasks such as leveling machine tools, checking surfaces of workpieces, or ensuring that parts are correctly aligned during production processes. They are made of durable materials like cast iron and are essential in precision engineering, where accuracy is crucial.

What is a "machinist level"?

machinist level

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A mason's level is a type of level specifically designed for use in masonry work, such as building walls or laying bricks. It typically features a longer, sturdy frame and one or more bubble vials to check whether surfaces are horizontal or vertical. The mason's level ensures that the surface being worked on is perfectly straight and aligned, which is crucial in masonry to ensure the strength and stability of the structure. These levels are often made from durable materials like aluminum or wood, allowing them to withstand heavy use in construction environments.

What is a "mason's level"?

mason's level

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A plumb bob is a simple tool used to find a vertical reference line, ensuring that surfaces or structures are perfectly upright. It consists of a weight, usually made of metal, attached to a string or cord. When the plumb bob is suspended from a point and allowed to hang freely, it will align itself with gravity, pointing directly downward. This helps measure or check for vertical alignment in construction, carpentry, and other projects, such as ensuring walls or posts are perfectly straight.

What is a "plumb bob"?

plumb bob

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A carpenter's level is a tool used by carpenters to check if a surface is perfectly horizontal or vertical. It typically consists of a straight bar with one or more bubble vials that indicate alignment. The vials are filled with liquid and have an air bubble that moves to the center when the tool is perfectly horizontal or vertical. Carpenter's levels come in various sizes, and some also feature magnets for use on metal surfaces. They are essential for ensuring precise measurements and alignment in tasks like framing, flooring, and cabinet installation.

What is a "carpenter's level"?

carpenter's level

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The concrete slump test is a method used to measure the consistency or workability of freshly mixed concrete. It involves filling a cone-shaped mold with concrete, then lifting the mold away. The amount the concrete settles or "slumps" after the mold is removed is measured. This slump value indicates the flowability of the concrete, helping to ensure it is suitable for the intended application. The test is often used in construction to check whether the concrete mix has the right consistency for pouring or shaping, especially for tasks like paving, foundation work, and forming structures.

What is the "concrete slump test"?

concrete slump test

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A total station is a modern surveying tool used to measure distances, angles, and elevations with high accuracy. It combines an electronic theodolite, which measures angles, and an electronic distance measurement (EDM) device, which measures distances, into one instrument. The total station is used to collect data for mapping, construction, and land surveying, allowing surveyors to create precise measurements and layouts. It can also store and process data, making it a powerful tool for large-scale projects. Total stations often use a computer interface to record and analyze measurements in real time.

What is a "total station"?

total station

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A theodolite is a precision instrument used to measure angles in both horizontal and vertical planes. It consists of a rotating telescope mounted on a base, allowing it to be adjusted to measure angles accurately. Theodolites are commonly used in surveying and construction to determine angles between points, helping create precise maps and layouts. The instrument is essential for tasks like land surveying, building foundations, and setting boundaries. Modern theodolites may also include digital features to measure angles more easily and record data for further analysis.

What is a "theodolite"?

theodolite

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A penetrometer is a tool used to measure the hardness or resistance of a material by determining how deeply a pointed probe can penetrate the surface. It is commonly used in fields like soil testing, construction, and agriculture to assess the consistency of materials, such as soil or concrete. In soil testing, a penetrometer helps measure soil compaction and its ability to allow water and air movement. In other applications, it helps evaluate the strength of materials or the firmness of surfaces. The device is essential for ensuring proper material properties for construction and other projects.

What is a "penetrometer"?

penetrometer

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A compaction hammer is a tool used to compact or compress soil, gravel, or other materials to increase their density and stability. It typically features a heavy, flat head that is dropped repeatedly onto the surface to apply force. This action helps to reduce air gaps within the material, making it stronger and less likely to shift or settle over time. Compaction hammers are commonly used in construction, road building, and landscaping to prepare foundations, roads, or pavements. They ensure that the materials are firmly packed, which is crucial for the durability of the finished structure.

What is a "compaction hammer"?

compaction hammer

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A leveling rod is a long, vertical measuring tool used in surveying to determine the height difference between points. It is typically marked with measurements along its length and is used in conjunction with a level or a total station. The leveling rod is placed at different points in a survey area, and the measurement on the rod is read from a telescope or optical instrument to determine elevation differences. This tool is commonly used in construction, road building, and land surveying to ensure accurate measurements and proper grading of surfaces.

What is a "leveling rod"?

leveling rod

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A dumpy level is a type of optical instrument used in surveying and construction to measure and establish horizontal levels over long distances. It consists of a telescope mounted on a tripod that can be adjusted to a horizontal position. The instrument has a spirit level built into it, allowing the user to align it properly. A dumpy level is typically used for tasks like leveling land, establishing floor levels, or setting out foundations. It is known for its simplicity, durability, and accuracy in measuring horizontal lines in surveying and construction projects.

What is a "dumpy level"?

dumpy level

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A measuring wheel is a tool used to measure distance by rolling it along a surface. It has a large wheel that rotates as it moves, with a built-in counter that records the distance traveled. The user simply pushes or walks the measuring wheel along the path they want to measure, and the counter displays the total distance. Measuring wheels are commonly used in construction, landscaping, and surveying for tasks like measuring property lines, roadways, or plots of land. They provide a quick and accurate way to measure distances over large areas.

What is a "measuring wheel"?

measuring wheel

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A protractor is a tool used to measure and draw angles. It is usually a flat, semicircular or circular device marked with degree measurements from 0 to 180 or 360. The protractor has a straight edge for aligning with a line or point, while the curved side is used to measure the angle between two meeting lines. Protractors are commonly used in geometry, drafting, carpentry, and construction to ensure accurate angle measurements for various projects. They come in different sizes and types, including digital versions for easier reading.

What is a "protractor"?

protractor

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A prism pole is a tool used in surveying to support a survey prism, which is a reflective device used to measure distances. The pole is typically made of lightweight materials like aluminum and is adjustable in length. It allows the surveyor to position the prism at the correct height for accurate measurements. The prism reflects signals from a total station or other measuring instruments, helping surveyors determine distances with high precision. Prism poles are essential for tasks like land surveying, construction, and road building, where accurate distance measurements are required.

What is a "prism pole"?

prism pole

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An architect's scale is a tool used to measure and draw scaled drawings in architecture and construction. It is a triangular ruler with multiple sides, each marked with different scales, allowing for accurate measurement and conversion of real-world dimensions to a smaller size on blueprints or plans. The most common scales on an architect's scale include 1:10, 1:50, and 1:100, among others. The tool helps architects, designers, and builders create detailed plans that represent the actual size of a building or structure. It is essential for ensuring accuracy in design and construction.

What is an "architect's scale"?

architect's scale

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A drafting board is a flat, smooth surface used for drawing or designing technical drawings, such as blueprints or architectural plans. It provides a stable and level base for using drawing tools like rulers, compasses, and protractors. Drafting boards are typically adjustable, allowing the user to set the board at a comfortable angle for drawing. They are commonly used by architects, engineers, and designers to create detailed and precise drawings. The surface of the board is often made of wood or other durable materials that are resistant to wear from drawing tools.

What is a "drafting board"?

drafting board

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A T-square is a drawing tool used in technical drawing and drafting. It consists of a long, straight edge that is attached to a shorter crosspiece, forming a "T" shape. The T-square is used to draw horizontal lines and to guide other drawing tools. It is commonly used on a drafting board to ensure straight, precise lines and is essential for architects, engineers, and designers when creating detailed plans or drawings. The T-square is typically made of wood, plastic, or metal for durability.

What is a "T-square"?

T-square

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A compass is a tool used for drawing circles or arcs and measuring distances on maps. It consists of two arms, one with a pointed end for placing on a surface and the other with a pencil or marker for drawing. The distance between the points can be adjusted to create circles of different sizes. Compasses are commonly used in geometry, drafting, and design for precise measurements and drawings. They are also used by surveyors and mapmakers to measure distances on maps by adjusting the compass arms to the scale of the map.

What is a "compass"?

compass

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A French curve is a curved template used in drafting and design to draw smooth, irregular curves. It is typically made of plastic or wood and features a series of different curved edges that can be used to create various shapes. The user places the French curve on the paper and traces along its edges to form curves that are difficult to draw freehand. French curves are commonly used by architects, engineers, and designers for precise and consistent curved lines, especially when drawing freeform shapes or when working on detailed technical drawings.

What is a "French curve"?

French curve

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A scale ruler is a tool used to measure and draw objects at a smaller or larger scale than their actual size. It has multiple scales marked on its surface, allowing users to convert measurements from a scaled drawing to real-world dimensions. The most common scales on a scale ruler include ratios like 1:10, 1:50, or 1:100. Scale rulers are widely used in fields such as architecture, engineering, and design to create and read blueprints, technical drawings, and maps accurately. They help ensure that drawings are proportionate and can be translated into real-world measurements.

What is a "scale ruler"?

scale ruler

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A drafting triangle is a tool used in technical drawing to create precise angles. It is typically made of plastic or metal and comes in various sizes. The most common drafting triangles are the 30-60-90 degree and 45-45-90 degree types. They are used in combination with a T-square or ruler to draw straight lines at specific angles. Drafting triangles are essential for architects, engineers, and designers, helping them create accurate geometric shapes and angles in their technical drawings and blueprints.

What is a "drafting triangle"?

drafting triangle

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A drafting pencil is a tool designed for precise and fine-line drawing in technical work such as drafting, sketching, and illustration. It typically has a thin, hard lead that produces sharp, clean lines without smudging, making it ideal for detailed drawings. Drafting pencils are often mechanical, allowing for easy lead replacement and consistent line thickness. The lead is usually marked with hardness levels, ranging from H, which is hard, to 9H, which is very hard, with harder leads being used for finer lines. These pencils are essential for professionals like architects, engineers, and designers who require accuracy and detail in their work.

What is a "drafting pencil"?

drafting pencil

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A carpenter pencil is a tool used by carpenters and builders for marking measurements, cutting lines, and measurements on wood and other construction materials. It has a flat, rectangular shape, which prevents it from rolling away when placed on surfaces. Carpenter pencils typically have a thick, durable lead that can create visible marks on rough surfaces. The lead is often softer than regular pencils, allowing for clear markings that do not easily fade. These pencils are essential in construction and woodworking, providing precise lines for accurate cutting, joining, and fitting of materials.

What is a "carpenter pencil"?

carpenter pencil

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Here you will learn some English words related to measuring and drafting tools such as "stud finder", "clinometer", and "prism pole".

英语单词为"测量和绘图工具"