2A656 Vol 2 Ure (2013)

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Screwdrivers are sized by the length of the shank. The shank refers to the cylindrical part of the screwdriver that fits into the handle and holds the blade. The length of the shank determines the reach and the depth that the screwdriver can reach into a screw or a hole. Therefore, the shank length is an important factor in determining the size and functionality of a screwdriver.

Connector plugs are used as junction points for circuits that are frequently disconnected because they provide a secure and reliable connection that can be easily disconnected and reconnected without causing damage to the wires or components. Terminal boards are more suitable for permanent connections, shielded wires are used for reducing electromagnetic interference, and splices are used for joining two or more wires together permanently. Therefore, connector plugs are the most appropriate choice for circuits that require frequent disconnection.

Box-end wrenches have a closed-loop design that provides a secure fit around the nut. This design reduces the likelihood of the wrench slipping off the nut during use, making them a reliable tool for tightening or loosening nuts.

The correct answer is "disconnected from the power source." Prior to soldering electronic equipment, it is important to disconnect the equipment from the power source to prevent any electrical accidents or damage to the equipment. This ensures the safety of the person performing the soldering and also protects the equipment from any power surges or voltage spikes that may occur during the soldering process. Properly disconnecting the equipment from the power source is a standard safety precaution in electronics work.

A permanent magnet is able to keep its magnetism because it is made of materials that have strong magnetic properties. These materials, such as iron, cobalt, and nickel, have their atomic magnetic moments aligned in a way that creates a strong magnetic field. This alignment remains even when the external magnetic field is removed, allowing the magnet to retain its magnetism over a long period of time.

The typical multimeter is a device used to measure various electrical quantities. It usually includes a voltmeter to measure voltage, an ammeter to measure current, and an ohmmeter to measure resistance. In this case, the correct answer is "ohmmeter, and ammeter" because these are the two components commonly found in a multimeter. A dosimeter and frequency meter are not typically included in a multimeter.

When using a hammer or any other hand tool, it is crucial to use the tool only for its correct purpose. This means using the tool in the way it was designed and intended to be used. Using a tool for a different purpose can result in inefficiency, potential damage to the tool or the object being worked on, and even personal injury. Therefore, it is important to always use the right tool for the job to ensure safety and effectiveness.

Before storing a torque wrench that has been used, it is recommended to set it at its lowest setting. This is important because leaving the torque wrench set at a high setting can cause the internal spring to become compressed and lose its calibration over time. By setting it at the lowest setting, the spring is relaxed and the torque wrench is less likely to lose its accuracy when not in use. It is also a good practice to lubricate the torque wrench with a light oil to prevent rust and ensure smooth operation. Checking the torque wrench for accuracy is also important, but it is not specifically mentioned in the question. Setting it at zero setting is not necessary before storing it.

When torquing a bolt assembly, the force applied to overcome friction is called torsion. Torsion refers to the twisting or rotational force applied to an object, in this case, the bolt assembly, to overcome the friction between its components. Torsion is commonly used in fastening applications, where the twisting force helps tighten the bolt and secure the components together.

A good rule to follow in using safety wire is to loop it so that it opposes the loosening of the part. This means that the wire should be twisted in a way that it tightens and secures the part, preventing it from coming loose. This technique ensures that the safety wire effectively serves its purpose of keeping the part in place and maintaining safety.

Wire insulation may consist of several layers of nonconducting material that provides thermal protection and fluid resistance. This means that the insulation helps to prevent the wire from overheating and also protects it from any fluids it may come into contact with. The multiple layers of nonconducting material provide an extra barrier of protection, ensuring that the wire remains safe and functional.

To test the heat of a soldering iron, you should touch the tip to the solder, away from your body. This is the correct answer because it ensures safety by keeping the hot tip away from your body, reducing the risk of burns or accidents. By touching the tip to the solder, you can also gauge the temperature and readiness of the iron for soldering tasks.

To ensure a secure and reliable connection, it is necessary to wrap the wire around the terminal at least 180°, but no more than 270°. This allows for proper contact between the wire and the terminal, ensuring a good electrical connection. Wrapping the wire too loosely or tightly can lead to a weak connection or damage to the wire or terminal. Therefore, it is important to follow this procedure prior to soldering a turret terminal.

When a gas is heated, the average kinetic energy of its particles increases. This increase in kinetic energy leads to more frequent and forceful collisions between the gas particles and the walls of the container. As a result, the gas exerts a greater force on the walls, causing an increase in pressure. Therefore, when a gas is heated, its pressure will increase.

Mutual induction is the process that transfers electrical energy from the primary to the secondary winding of a transformer. This occurs when a changing current in the primary winding creates a changing magnetic field, which then induces a voltage in the secondary winding. This voltage can be used to transfer electrical energy from one circuit to another. Reluctance refers to the opposition to the flow of magnetic flux, and radiation is the emission of energy in the form of electromagnetic waves, neither of which directly transfer electrical energy in a transformer.

Thickness gauges are typically used to measure the clearance between two objects. These gauges come in various sizes and are specifically designed to determine the space or gap between two surfaces. They are not used to measure the depth of a hole, the thread size of a bolt, or the outside diameter of a tube. Therefore, the correct answer is clearance between two objects.

The electrical magnetic pulse (EMP)-hardened cable is designed to protect against electrostatic interference. Electrostatic interference refers to the disturbance caused by static electricity, which can interfere with the proper functioning of electronic devices. By providing a barrier to electrostatic interference, the EMP-hardened cable ensures that the electrical signals transmitted through it are not affected by static electricity, thus maintaining the integrity of the electrical system.

After soldering, it is important to remove traces of flux, which is a material used to clean and prepare surfaces for soldering. A medium-stiff brush is commonly used to scrub away the flux residue, as it can effectively remove the flux without causing damage to the soldered components. An approved solvent is also necessary to help dissolve the flux and aid in its removal. Therefore, using a medium-stiff brush and an approved solvent is the correct method for removing traces of flux after soldering.

The intensity of electrical current flow is measured in amperes. Amperes, also known as amps, are the unit of measurement for electric current. It represents the rate of flow of electric charge in a circuit. Volts, on the other hand, measure the electric potential difference or voltage, cycles measure the frequency of alternating current, and coulombs measure the quantity of electric charge. Therefore, the correct answer is amperes.

A positive peak is reached when the waveform reaches its maximum positive value. In this case, the options provided indicate the positions in degrees at which the positive peak occurs. Among the given options, 90 degrees represents the position where the positive peak is reached.

Slip refers to the difference in speed between the stator's rotating magnetic field and the rotor in an induction motor. It is a crucial parameter that determines the motor's efficiency and performance. When the rotor's speed is less than the speed of the rotating magnetic field, slip occurs, allowing the motor to generate torque and rotate. Therefore, slip is the correct answer in this context.

Pitting corrosion is a localized form of corrosion that occurs on the surface of metals, such as aluminum or magnesium alloys. It is characterized by the formation of small pits or holes in the metal. The first indication of pitting corrosion is often the presence of a white powdery deposit on the metal surface. This deposit is formed as a result of the chemical reactions that take place during the corrosion process. As the corrosion progresses, the pits may become larger and more visible, leading to further damage to the metal surface.

A properly ground tip on a standard screwdriver is square and flat because this shape allows for maximum contact with the screw slot, ensuring a secure grip and minimizing the risk of slipping or stripping the screw. A square and flat tip also provides better torque transfer, making it easier to turn the screw and apply the necessary force.

The correct answer is 1-1A-14. This technical order (TO) provides instructions for the Brady Wire Marking System.

During the soldering process, oxide films can form on the surface of metals, which can prevent proper adhesion of the solder. To remove these oxide films, a soldering flux is used. The flux helps to clean the metal surface by reacting with the oxide layer and dissolving it. This allows the solder to flow and bond effectively with the metal, ensuring a strong and reliable connection. Therefore, the soldering flux is the correct answer for removing oxide films from the surface of metals during soldering.

After soldering a connection, the next step is to clean the connection and inspect it for defects. This is important to ensure that the connection is free from any debris or flux residue that may affect its performance. Inspecting the connection allows for identification of any defects or issues that may need to be addressed before moving forward. This step helps to ensure the quality and reliability of the soldered connection.

The greater the current flow through an electromagnet, the stronger the magnetic field it produces. This is because the magnetic field is directly proportional to the current flowing through the electromagnet. Therefore, as the current increases, the field strength also increases.

In a two-phase induction motor, the current is 90 degrees out-of-phase. This means that the current in one phase lags behind the current in the other phase by 90 degrees. This phase difference is necessary for the motor to create a rotating magnetic field, which is essential for its operation. The reversal of the current 60 times a second ensures that the magnetic field continuously rotates, allowing the motor to generate torque and rotate.

A switch is used as a circuit-controlling device. It is a mechanical device that can open or close an electrical circuit, allowing or interrupting the flow of current. By flipping the switch, the circuit can be turned on or off, controlling the flow of electricity to the connected devices. Fuses, current limiters, and circuit breakers also play important roles in electrical circuits, but they are not primarily used as circuit-controlling devices like switches.

Flat, coated surfaces are not prone to corrosion because the coating acts as a protective barrier, preventing direct contact between the metal and corrosive elements in the environment. On the other hand, dissimilar metals in contact can create a galvanic cell, leading to corrosion. Fittings and plumbing are also susceptible to corrosion due to exposure to moisture and chemicals. Overlapping joints can trap moisture and debris, promoting corrosion.

When installing a cotter pin, it is important to ensure that the prong that bends over the bolt shank does not exceed the bolt diameter. This is because the diameter of the bolt determines the size of the hole through which the cotter pin is inserted. If the prong of the cotter pin exceeds the bolt diameter, it may not fit properly and could potentially cause the pin to become loose or ineffective in securing the bolt. Therefore, it is crucial to match the cotter pin size with the bolt diameter to ensure proper installation and secure fastening.

There are no nicked or broken wire strands allowed on 16-gauge aluminum wire. This is because any damage to the wire strands can weaken the overall structure of the wire and compromise its conductivity and safety. Therefore, it is important to ensure that the wire is free from any damage or defects for optimal performance.

A key-and-key way arrangement ensures that a connector plug and receptacle are not mismated. This arrangement involves the use of a key, which is a small metal piece that fits into a corresponding key way or slot on the plug and receptacle. The key and key way are uniquely shaped, preventing the plug from being inserted into the wrong receptacle or vice versa. This helps to ensure that the correct connections are made and prevents any potential damage or malfunction that could occur from a mismatched connection.

When heat is applied to thermofit material, it will shrink by one-half its original diameter. This means that the material will reduce in size by 50% of its original diameter when exposed to heat.

When making wire connections to turret terminals, it is necessary to wrap the wire around the terminal at least 180 degrees. This ensures a secure and reliable connection between the wire and the terminal, minimizing the risk of the wire coming loose or losing electrical conductivity. Wrapping the wire around the terminal at this angle creates a tight and firm grip, ensuring that the connection remains intact even under vibrations or other external forces.

An acceptable tinned wire has an insulation clearance equal to the diameter of the wire, meaning that there is no insulation covering the wire strands. The wire strands are covered with solder, but they are still visible. This means that the solder provides a protective coating for the wire strands, but does not completely cover them, allowing for visibility.

To check for a shorted relay in a parallel circuit, it is necessary to isolate the component. By disconnecting the relay from the circuit, it can be examined separately to determine if there is a short. This allows for a more accurate assessment of the relay's condition without interference from other components in the circuit. Turning the power on, using an ammeter, and using a voltmeter are not sufficient steps to specifically check for a shorted relay in a parallel circuit.

If a sealed lead acid battery is found to be leaking during maintenance, the first thing to be done is to terminate the maintenance. This is because a leaking battery can be dangerous and pose a risk of chemical burns or fire. By stopping the maintenance process, further exposure to the leaking battery can be avoided, minimizing the potential harm to individuals and preventing any potential accidents.

The tubing used in aircraft for various purposes such as oxygen, fuel, lubrication, fire extinguishing, instruments, hydraulic, and vent lines is made of aluminum alloy and stainless steel. These materials are chosen for their specific properties and suitability for their respective applications. Aluminum alloy is lightweight and has good corrosion resistance, making it ideal for applications where weight is a concern. Stainless steel, on the other hand, is known for its high strength and excellent resistance to corrosion, making it suitable for applications where durability and resistance to harsh environments are required.

A fitting that has pipe threads can be identified by its taper. Pipe threads have a tapered shape, meaning that the diameter of the threads gradually decreases towards the end. This taper allows the fitting to create a tight seal when screwed into another fitting or pipe with matching threads. By recognizing the taper on the fitting, one can determine that it is designed for use with pipe threads.

After prepping the wire, the next step is to melt a small amount of solder inside the terminal. This is done to ensure a secure and strong connection between the wire and the terminal. The melted solder will fill any gaps or spaces inside the terminal, creating a solid bond. This step is crucial in achieving a reliable and durable solder joint.

To calculate the number of British thermal units (BTU) required to raise the temperature of water, we need to use the specific heat capacity of water. The specific heat capacity of water is 1 BTU/lb.°F. In this case, we have 5 pounds of water and we need to raise the temperature by 5°F. Therefore, the calculation would be 5 pounds * 5°F * 1 BTU/lb.°F = 25 BTU. Thus, it takes 25 BTU to raise the temperature of 5 pounds of water by 5°F.

To compute capacitance, one must consider the plate area, distance between the plates, and type of dielectric. The plate area is important because a larger area allows for more charge to be stored on the plates. The distance between the plates is crucial because a smaller distance allows for a stronger electric field, resulting in a higher capacitance. The type of dielectric affects the capacitance because different materials have different abilities to store charge. Therefore, all three factors - plate area, distance between the plates, and type of dielectric - are necessary to accurately calculate the capacitance.

When wire supports are more than 12 inches apart, it is necessary to tie all wire groups or bundles together. This is because without tying them, the wires may sag or become loose, which can lead to potential hazards such as electrical shorts or damage to the wires. By tying the wire groups or bundles, they are held securely in place and maintain proper alignment and tension, ensuring the safety and functionality of the wiring system.

A good solder connection should have no pits or holes, indicating that the solder has properly filled in the joint and there are no gaps or voids. Additionally, it should have a good concave fillet, meaning that the solder has formed a smooth, curved shape that indicates a strong bond between the components being soldered.

The NOR gate is the correct answer because it produces a high output only when all of its inputs are low. This means that if any input to the NOR gate is high, the output will be low. Therefore, the NOR gate is often used as a universal gate because it can be used to implement any other logic gate.

Bicarbonate of soda, also known as baking soda, is the correct neutralizing agent for sulfuric acid. When sulfuric acid reacts with bicarbonate of soda, it forms carbon dioxide gas, water, and a salt called sodium sulfate. This reaction helps to neutralize the acidity of sulfuric acid and reduce its corrosive properties. Distilled water, boric acid, and regular water do not have the ability to neutralize sulfuric acid. Therefore, bicarbonate of soda is the most suitable neutralizing agent in this case.

The indent-type crimping tool should be used only on noninsulated terminals. This is because the tool is specifically designed to create a secure and reliable connection between the wire and the terminal. Noninsulated terminals do not have any protective covering or insulation, so using the indent-type crimping tool ensures that the connection is properly made without damaging the terminal or causing any electrical issues. On the other hand, preinsulated splices and terminals already have insulation, so using the indent-type crimping tool may damage the insulation or result in an unreliable connection.

The preferred type of solder for printed circuit boards is 63/37. This solder alloy is composed of 63% tin and 37% lead. It is commonly used in electronics manufacturing because it has a lower melting point compared to other solder alloys, making it easier to work with. Additionally, the 63/37 solder provides good wetting and flow properties, ensuring reliable and strong connections between the components and the circuit board.