1.
The tool used to give support while bending sheet metal is known as.
Correct Answer
D. Stake
Explanation
The tool used to give support while bending sheet metal is known as a stake. A stake is a metal rod or post that is used to provide stability and support to the sheet metal during the bending process. It helps to prevent the metal from deforming or buckling under the pressure, ensuring a clean and accurate bend. Stakes come in various shapes and sizes to accommodate different bending needs and can be used in conjunction with other tools to achieve desired results.
2.
Bent snip is used for
Correct Answer
D. For cutting sheet with curved line
Explanation
A bent snip is a type of cutting tool that is specifically designed for cutting sheet metal or other similar materials along a curved line. The bent shape of the snip allows for better maneuverability and control when cutting along curves, making it the ideal tool for tasks that require precise and accurate cutting of sheet metal in a curved shape.
3.
Which rivet is appropriate for the riveting of soft metal like leather ,plastic ,etc
Correct Answer
D. Counter sunk head rivet
Explanation
Counter sunk head rivets are appropriate for riveting soft metals like leather and plastic because they have a flat head that can sit flush with the surface of the material. This ensures a smooth and even finish, without any protrusions or obstructions. The countersunk shape of the head allows the rivet to be easily countersunk into the material, creating a clean and neat appearance. Additionally, the design of the counter sunk head rivet provides a strong and secure connection between the two pieces of material being joined together.
4.
The full form of SWG is-
Correct Answer
C. Standard wire gauge
Explanation
SWG stands for Standard Wire Gauge. It is a measurement system used for determining the size of wire. This standard is widely used in various industries, especially in electrical and engineering fields. The SWG system assigns a specific number to each wire size, with smaller numbers representing thicker wires. This standardized gauge helps ensure consistency and compatibility in wire sizes across different applications.
5.
The length of snap head rivet is given by the formula.
Correct Answer
D. L=T+d(1.3-1.6)
Explanation
The correct answer is L=T+d(1.3-1.6). This formula calculates the length of a snap head rivet. It takes into account the thickness of the material (T) and the diameter of the rivet (d). By multiplying the diameter by the difference between 1.3 and 1.6, and adding the thickness, we can determine the length of the rivet.
6.
Which metal is use for bit of hatched soldering iron?
Correct Answer
B. Copper
Explanation
Copper is used for the bit of a soldering iron because it has excellent thermal conductivity and can quickly transfer heat to the solder joint. It also has a low melting point, which allows it to melt the solder effectively. Copper is a durable and corrosion-resistant metal, making it suitable for prolonged use in soldering applications. Additionally, copper is easily shaped and can be formed into various tip shapes, providing versatility for different soldering tasks.
7.
Snip is also known as
Correct Answer
A. Hand shear
Explanation
Snip is also known as a hand shear. Hand shears are a type of cutting tool that are used to cut through various materials such as metal, fabric, or paper. They typically have two sharp blades that are operated by hand, allowing for precise cutting and shaping. Hand shears are commonly used in industries such as construction, tailoring, and crafting.
8.
The brazing temperature is -
Correct Answer
B. More than 450 degree celcius
Explanation
The correct answer is more than 450 degrees Celsius. This is because brazing is a joining process that requires the base metals to be heated above their melting point but below the melting point of the filler metal being used. Typically, brazing temperatures range from 600 to 1500 degrees Celsius, depending on the specific materials being joined. Therefore, a temperature higher than 450 degrees Celsius is necessary for successful brazing.
9.
A non corrosive flux used for soldering is -
Correct Answer
A. Resin
Explanation
Resin is a non corrosive flux used for soldering. It is a substance that helps in removing oxides from the metal surface and promotes better adhesion of the solder. Unlike other options like ammonium chloride, hydrochloric acid, and zinc chloride, resin does not have corrosive properties that can damage the metal being soldered. Therefore, resin is the correct choice for a non corrosive flux in soldering.
10.
The soft solder is a mixture of -
Correct Answer
A. Tin and lead
Explanation
Soft solder is a low melting point alloy used for joining metals together. It is typically composed of tin and lead, making it easy to melt and apply to the surfaces being joined. The mixture of tin and lead creates a strong bond between the metals, allowing them to be securely connected. Copper and lead, brass and lead, and phosphorus and copper are not commonly used combinations for soft solder.
11.
The melting point of hard solder is -
Correct Answer
C. 450 degree celcius
Explanation
Hard solder is a type of solder that has a higher melting point compared to soft solder. It is typically used for joining metals that require a stronger bond. The correct answer, 450 degrees Celsius, indicates the melting point of hard solder. This means that it will start to liquefy and become molten at this temperature, allowing it to flow and create a bond between the metals being joined.
12.
Which notch is used from the following , when the job is made with a 90 degree bend ?
Correct Answer
B. V notch
Explanation
The V notch is used when the job is made with a 90 degree bend.
13.
Which stake is used for shaping and seaming of a funnel and tapered objects?
Correct Answer
C. Funnel stake
Explanation
The correct answer is Funnel stake. A funnel stake is specifically designed for shaping and seaming funnels and tapered objects. It has a tapered shape that allows for easy forming and shaping of the material. The curved surface of the stake helps in creating smooth and even curves, making it ideal for working on funnel-shaped objects.
14.
Mallet is made from .........
Correct Answer
C. Hard wood
Explanation
Mallets are typically made from hard wood because it provides the necessary weight and durability for various woodworking and construction tasks. Hard wood, such as hickory or oak, is strong enough to withstand repeated striking without breaking or splintering. It also has a natural shock-absorbing quality, which helps to minimize the impact on the user's hand and wrist. Additionally, hard wood is readily available and relatively affordable compared to other materials like lead, brass, or cast iron, making it a popular choice for making mallets.
15.
GI sheet coated with -
Correct Answer
C. Zinc
Explanation
The correct answer is Zinc. GI sheet stands for Galvanized Iron sheet, which is coated with a layer of zinc. This coating helps to protect the iron sheet from corrosion and rusting. Zinc is commonly used for this purpose as it is a highly corrosion-resistant metal. It forms a protective barrier on the surface of the iron sheet, preventing it from coming into direct contact with moisture and other corrosive substances. This makes the GI sheet more durable and long-lasting.
16.
The property of sheet metal due to which the sheet can be rolled in one direction is called-
Correct Answer
D. Directionality
Explanation
Directionality refers to the property of sheet metal that allows it to be rolled in one specific direction. This means that the sheet can be easily manipulated and formed into a desired shape without losing its structural integrity. This property is important in industries such as manufacturing and construction, where sheet metal is commonly used for various applications.
17.
Least count of the steel rule is......
Correct Answer
B. 0.5mm
Explanation
The least count of a measuring instrument refers to the smallest value that can be measured or read using that instrument. In the case of a steel rule, the least count is typically determined by the smallest division or marking on the rule. Therefore, the correct answer is 0.5mm, as it is the smallest value that can be accurately measured using the given steel rule.
18.
Which hammer is used for sheet metal work?
Correct Answer
D. Soft hammer
Explanation
A soft hammer is used for sheet metal work because it has a non-marring surface that prevents damage to the metal. It is typically made of materials like rubber or plastic, which absorb the impact and reduce the risk of leaving marks or dents on the sheet metal. This makes it ideal for shaping and forming delicate metal sheets without causing any harm to the surface.
19.
The file is made of......
Correct Answer
C. High carbon steel
Explanation
The file is made of high carbon steel because it is a material that is known for its hardness and durability. High carbon steel contains a higher percentage of carbon compared to other types of steel, which gives it these desirable properties. This makes it suitable for use in tools such as files, as it can effectively shape and smooth hard materials. Additionally, high carbon steel is resistant to wear and can maintain its sharpness for a longer period of time.
20.
Mallet is made from ..........
Correct Answer
D. Hard wood
Explanation
Mallets are typically made from hard wood because it provides a durable and sturdy material for striking and pounding tasks. Hard wood, such as oak or hickory, is able to withstand repeated impact without easily breaking or splintering. This makes it ideal for use in woodworking, construction, and other applications where a strong and reliable tool is needed. Additionally, hard wood has a natural weight and balance that helps to maximize the force and accuracy of each strike.
21.
The bent snips is used for-
Correct Answer
C. Cutting the sheet along the covered lines
Explanation
The bent snips are designed specifically for cutting the sheet along the covered lines. The bent shape of the snips allows for better visibility and control while cutting along the specified lines. This tool is commonly used in metalworking and sheet metal fabrication to accurately cut the sheet along predetermined lines without causing any damage to the surrounding material. It provides a clean and precise cut, making it an essential tool for cutting sheets in various industries.
22.
Which joint should be used for roof construction work from the following?
Correct Answer
D. Double grooved seam joint
Explanation
A double grooved seam joint should be used for roof construction work because it provides a strong and secure connection between two pieces of material. This type of joint involves creating two grooves or channels in the materials that fit together, increasing the surface area for bonding and enhancing the overall strength of the joint. It is commonly used in roofing to create a watertight seal and prevent leaks.
23.
Which stake is used for shaping and seaming of a funnel and tapered object?
Correct Answer
C. Funnel stake
Explanation
A funnel stake is used for shaping and seaming of a funnel and tapered object. This stake is specifically designed to create the desired shape and smooth curves of a funnel or any tapered object. It provides the necessary support and surface for hammering and shaping the metal into the desired form. The other options, such as hatchet stake, half moon stake, and creasing stake, do not have the specific shape and features required for shaping and seaming a funnel or tapered object.
24.
The thickness of sheet metal is represented by a series of numbers. it is called-
Correct Answer
A. Gauge
Explanation
The correct answer is "gauge." In the context of sheet metal, the thickness is commonly measured using a gauge system. This system assigns a specific number to represent the thickness of the metal, with lower numbers indicating thicker sheets and higher numbers indicating thinner sheets. Therefore, the term "gauge" accurately represents the measurement of sheet metal thickness.
25.
This process is used for joining the sheet together by means of a rivet.
Correct Answer
C. Riveting
Explanation
Riveting is the correct answer because it is a process commonly used to join sheets together using rivets. Rivets are fasteners that are inserted through holes in the sheets and then secured by deforming the end of the rivet. This creates a permanent and strong connection between the sheets. Soldering involves melting a filler metal to join the sheets, punching is a process of creating holes in the sheets, and planishing is a technique used to smooth and shape metal surfaces.
26.
To produce external thread is called as.....
Correct Answer
B. Dieing
Explanation
The process of producing external threads is called "dieing". This involves using a die, which is a specialized tool with ridges that match the desired thread pattern. The die is applied to the surface of the material, and as it is rotated, it cuts into the material to create the external threads. Tapping, on the other hand, is the process of producing internal threads. Drilling and boring are unrelated to the production of threads.
27.
Snip is also known as..
Correct Answer
C. Shear
Explanation
Snip is a type of cutting tool that is commonly referred to as a shear. Shears are designed to cut through various materials, such as metal or fabric, with two sharp blades that slide past each other. Therefore, the correct answer is shear.
28.
The process of joining similar metals with or with out application of filler rod is called........
Correct Answer
B. WeldingÂ
Explanation
Welding is the correct answer because it is the process of joining similar metals together, either with or without the use of a filler rod. Soldering is the process of joining metals using a lower melting point filler metal, while brazing is the process of joining metals using a higher melting point filler metal. Turning, on the other hand, is a machining process used to create cylindrical shapes.
29.
Safety apparels are Apron, gloves and shoes are made of ..........
Correct Answer
D. Leather
Explanation
Safety apparels such as aprons, gloves, and shoes are made of leather because leather is a durable and protective material. It provides a strong barrier against potential hazards, such as chemicals or sharp objects, and offers good resistance to wear and tear. Leather is also flexible and comfortable to wear, allowing for ease of movement while ensuring safety in various work environments. Additionally, leather has natural insulating properties, making it suitable for protection against heat and cold.