Meno

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Meno281
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Quizzes Created: 1 | Total Attempts: 2,147
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  • 1/125 Questions

    The standard identification color for piping used in fire protection, Materials and equipment is:

    • Blue
    • Green
    • Yellow
    • Red
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Mechanical Engineering Quizzes & Trivia
About This Quiz

This quiz titled 'Meno' evaluates knowledge on piping systems, focusing on installation, testing, and safety procedures. It assesses practical skills crucial for mechanical engineering, emphasizing the application of standards like ASME and API.

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  • 2. 

    What should be used to lift stainless steel pipe?

    • Wire choker

    • Nylon sling

    • Wire rope

    • Chain

    Correct Answer
    A. Nylon sling
    Explanation
    A nylon sling should be used to lift stainless steel pipe because nylon slings are durable, flexible, and have a high strength-to-weight ratio. They are specifically designed for lifting heavy loads and are resistant to damage from sharp edges or rough surfaces. Additionally, nylon slings are non-conductive, which is important when working with stainless steel to prevent electrical hazards.

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  • 3. 

    How often should a GFCI be inspected?

    • Once a year

    • Every three months

    • Before each use

    • Every week

    Correct Answer
    A. Before each use
    Explanation
    A GFCI (Ground Fault Circuit Interrupter) should be inspected before each use to ensure its proper functioning. This is because GFCIs are designed to protect against electrical shocks and faults, and regular inspections help identify any potential issues or malfunctions. By inspecting the GFCI before each use, one can ensure that it is in good working condition and capable of providing the necessary protection.

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  • 4. 

    Which of the following is the decimal equivalent of 3/4 inch?

    • 0.25

    • 0.34

    • 0.75

    • 1.41

    Correct Answer
    A. 0.75
    Explanation
    The decimal equivalent of a fraction is obtained by dividing the numerator by the denominator. In this case, dividing 3 by 4 gives us 0.75. Therefore, 0.75 is the decimal equivalent of 3/4 inch.

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  • 5. 

    How many degrees are in a circle?

    • 45 degrees

    • 90 degrees

    • 180 degrees

    • 360 degrees

    Correct Answer
    A. 360 degrees
    Explanation
    A circle is a geometric shape that is formed by a set of points equidistant from a fixed center point. It is a two-dimensional shape with no angles. The measurement of a full circle is 360 degrees. This is because a circle is divided into 360 equal parts, each part being 1 degree. Therefore, the correct answer is 360 degrees.

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  • 6. 

    When working from a suspended scaffold, a worker MUST wear a fully-body harness that is securely tied to a(n):

    • Cable tray

    • Anchorage point

    • Scaffold

    • Conduit

    Correct Answer
    A. Anchorage point
    Explanation
    When working from a suspended scaffold, it is crucial for a worker to wear a fully-body harness that is securely tied to an anchorage point. This is because the anchorage point provides the necessary support and stability to prevent the worker from falling or being injured. Wearing a harness that is securely tied to the anchorage point ensures that the worker remains safely attached to the scaffold and reduces the risk of accidents or falls.

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  • 7. 

    A strainer installed in a system is used to catch

    • Water

    • Oil

    • Antifreeze

    • Debris

    Correct Answer
    A. Debris
    Explanation
    A strainer installed in a system is used to catch debris. This is because debris refers to any loose particles, dirt, or fragments that may be present in the system. The purpose of a strainer is to filter out these unwanted contaminants and prevent them from causing damage or obstruction to the system. By catching debris, the strainer helps to maintain the cleanliness and proper functioning of the system.

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  • 8. 

    B-7 studs are made of.

    • Nickel

    • Carbon steel

    • Stainless steel

    • Bronze alloy

    Correct Answer
    A. Carbon steel
    Explanation
    B-7 studs are made of carbon steel. Carbon steel is a common material used for fasteners like studs due to its high strength and durability. It is a type of steel that contains a higher carbon content, which improves its hardness and strength compared to other types of steel. Carbon steel studs are often used in applications that require high tensile strength and resistance to corrosion. Nickel, stainless steel, and bronze alloy are not commonly used materials for B-7 studs.

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  • 9. 

    How should bolts on an 8-bolt flange be tightened?

    • In a circular pattern

    • In a cross-over pattern

    • Tighten each bolt to finger tightness then use the channel locks

    • Tighten each bolt until the top of the bolt is even with the top of the nut

    Correct Answer
    A. In a cross-over pattern
    Explanation
    Bolts on an 8-bolt flange should be tightened in a cross-over pattern. This means that the bolts should be tightened in a sequence that alternates across the flange, rather than tightening them in a circular pattern. This method helps to ensure that the flange is evenly and securely tightened, reducing the risk of leaks or damage. Tightening in a cross-over pattern helps distribute the pressure evenly across the flange, providing a more secure and stable connection.

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  • 10. 

    ALWAYS test lift an object 1 to 2 inches to ensure that it is

    • Heavy

    • Balanced

    • Light

    • Off center

    Correct Answer
    A. Balanced
    Explanation
    To ensure that an object is balanced, it is important to test lifting it 1 to 2 inches. This allows us to assess whether the weight distribution is equal on both sides, indicating balance. If the object feels heavy or off-center, it suggests an imbalance. Therefore, lifting the object slightly helps in determining if it is balanced or not.

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  • 11. 

    The majority of pipehangers and supports are coated with zinc-rich galvanizer to

    • Provide for a flexible support

    • Verify color code for pipe supports

    • Reduce friction in pipe supports

    • Provide corrosion resistance of pipe supports

    Correct Answer
    A. Provide corrosion resistance of pipe supports
    Explanation
    Pipehangers and supports are often exposed to harsh environments, including moisture and chemicals, which can lead to corrosion. Coating them with zinc-rich galvanizer helps to provide corrosion resistance by forming a protective layer on the surface of the supports. This layer acts as a barrier, preventing the metal from coming into direct contact with corrosive substances and extending the lifespan of the supports.

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  • 12. 

    WPS stands for:

    • Washington Public Service

    • Water Public Service

    • Welding Procedure Specification

    • Welder Performance Schedule

    Correct Answer
    A. Welding Procedure Specification
    Explanation
    WPS stands for Welding Procedure Specification. This term is commonly used in the field of welding to refer to a document that provides detailed instructions and requirements for carrying out a specific welding procedure. It outlines the necessary equipment, materials, techniques, and safety measures to be followed during the welding process. The Welding Procedure Specification ensures that the welding work is performed consistently and meets the required standards and quality.

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  • 13. 

    On a horizontal run, what type of support is attached vertically from above the pipe ?

    • Slide

    • Hanger

    • Structural

    • Base

    Correct Answer
    A. Hanger
    Explanation
    A hanger is a type of support that is attached vertically from above the pipe on a horizontal run. It is used to suspend or hold the pipe in place, preventing it from sagging or moving. Hangers are commonly used in plumbing and HVAC systems to provide stability and support to pipes. They are typically made of metal and come in various designs depending on the specific requirements of the pipe installation.

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  • 14. 

    Ladders should be inspected:

    • Daily

    • Weekly

    • Monthly

    • Before each use

    Correct Answer
    A. Before each use
    Explanation
    Ladders should be inspected before each use to ensure their safety and stability. By inspecting the ladder before every use, any potential defects or damage can be identified and addressed promptly, reducing the risk of accidents or injuries. Regular inspections help to identify any loose or missing parts, cracks, or other signs of wear and tear that could compromise the ladder's structural integrity. This proactive approach ensures that the ladder is in good condition and suitable for use, promoting a safe working environment.

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  • 15. 

    How many turns by hand are normally sufficient to check the threads?

    • 7 to 8 turns

    • 5 to 6 turns

    • 3 to 4 turns

    • 1 to 2 turns

    Correct Answer
    A. 3 to 4 turns
    Explanation
    The correct answer is 3 to 4 turns. This is because checking the threads requires enough rotations to ensure that they are properly engaged and secure, but excessive turns can potentially damage the threads. Therefore, a moderate range of 3 to 4 turns is considered sufficient to check the threads without causing any harm.

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  • 16. 

    What is the MOST commonly used light lifting device?

    • Air tugger

    • Hydraulic jack

    • Screw jack

    • Chain come-along

    Correct Answer
    A. Chain come-along
    Explanation
    A chain come-along is the most commonly used light lifting device because it is portable, versatile, and easy to use. It consists of a chain that is pulled through a ratchet mechanism, allowing for controlled lifting and lowering of loads. The chain come-along is commonly used in various industries, such as construction, automotive, and agriculture, for tasks such as pulling, stretching, and lifting heavy objects. Its compact size and ability to generate high pulling forces make it a popular choice for light lifting applications.

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  • 17. 

    A run of a screw pipe is being installed in the field. What should be done before inserting a threaded pipe in a fitting ?

    • Cut threads deeper

    • Apply anti-seize

    • Apply a thin coat of oil

    • Apply pipe dope

    Correct Answer
    A. Apply pipe dope
    Explanation
    Before inserting a threaded pipe in a fitting, it is recommended to apply pipe dope. Pipe dope is a type of sealant that helps create a tight and leak-free connection between the pipe and the fitting. It fills any gaps or imperfections in the threads, preventing leaks and ensuring a secure connection. Applying pipe dope also helps lubricate the threads, making it easier to tighten the pipe into the fitting. This ensures a proper seal and reduces the risk of leaks or damage to the pipe or fitting during installation.

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  • 18. 

    Which of the following fittings is REQUIRED to reduce pipe diameter for socket weld pipe fabrication?

    • Flange

    • Lap joint

    • Swage or bushing

    • Lateral

    Correct Answer
    A. Swage or bushing
    Explanation
    A swage or bushing is required to reduce the pipe diameter for socket weld pipe fabrication. This fitting is used to connect two pipes of different diameters by inserting it into the larger pipe and welding it in place. It acts as a reducer, allowing for a smooth transition between the two pipe sizes. This fitting is necessary to ensure a proper and secure connection between the pipes and to maintain the integrity of the overall piping system.

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  • 19. 

    What is used to open flanges for the installation of a test blind?

    • Hammer and wedge

    • C-clamp

    • Flange spreader

    • Pry bar

    Correct Answer
    A. Flange spreader
    Explanation
    A flange spreader is used to open flanges for the installation of a test blind. It is a tool specifically designed for this purpose, allowing for the safe and efficient separation of flanges. This tool helps to create enough space between the flanges to insert the test blind, ensuring a secure and proper installation. Using a flange spreader eliminates the need for other tools like a hammer and wedge, C-clamp, or pry bar, as it is specifically designed for this task.

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  • 20. 

    Where can information about the service, pressure rating, temperature limit, maximum pressure, and class of piping system be located?

    • Piping symbols

    • Line list

    • Line number

    • Isometric drawing

    Correct Answer
    A. Isometric drawing
    Explanation
    An isometric drawing is a detailed representation of a piping system, showing the arrangement and layout of the pipes, fittings, and other components. It includes information about the service, pressure rating, temperature limit, maximum pressure, and class of the piping system. Therefore, all the required information can be located in an isometric drawing.

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  • 21. 

    How many bolts are needed for a 4-inch, 600# flange?

    • 4

    • 6

    • 8

    • 12

    Correct Answer
    A. 8
    Explanation
    A 4-inch, 600# flange typically requires 8 bolts. The number of bolts needed for a flange is determined by the flange size and the pressure rating. In this case, the flange size is 4 inches and the pressure rating is 600 pounds. The standard bolt pattern for a 4-inch, 600# flange is 8 bolts. Therefore, the correct answer is 8.

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  • 22. 

    What should be used to hold the pipe when setting up two 40-foot joints of 16-inch STD WT pipe?

    • Three-legged V-top jacks

    • Three-legged roller-top jacks

    • Four-legged roller-top jacks

    • Pipefitter chain vise

    Correct Answer
    A. Four-legged roller-top jacks
    Explanation
    Four-legged roller-top jacks should be used to hold the pipe when setting up two 40-foot joints of 16-inch STD WT pipe. These jacks provide stability and support for the pipe during the setup process.

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  • 23. 

    Threaded unions are normally used in threaded pipe applications to:

    • Join threaded pipe to outt weld pipe of the same diameter

    • Join socket welded pipe

    • Disconnect pipe of different diameter

    • Disconnect the pipe at a future time

    Correct Answer
    A. Disconnect the pipe at a future time
    Explanation
    Threaded unions are used in threaded pipe applications to allow for easy disconnection of the pipe at a future time. This is because unions consist of two threaded ends that can be easily screwed and unscrewed, allowing for quick and convenient disassembly of the pipe system. This is particularly useful in situations where maintenance or repairs may be required, as the threaded union allows for easy access and disconnection of the pipe without the need for cutting or welding.

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  • 24. 

    If a ladder is leaning against a 16-ft wall, how farm should the base of the ladder be from the wall?

    • 2 ft

    • 4 ft

    • 6 ft

    • 8 ft

    Correct Answer
    A. 4 ft
    Explanation
    The base of the ladder should be 4 ft away from the wall. This is because the ladder forms a right triangle with the wall and the ground. The ladder acts as the hypotenuse of the triangle, and the distance between the wall and the base of the ladder is one of the legs. Using the Pythagorean theorem (a^2 + b^2 = c^2), we can calculate that the other leg, which represents the distance between the base of the ladder and the wall, is 12 ft. Therefore, the base of the ladder should be 4 ft away from the wall.

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  • 25. 

    What should be worn when cutting with an oxy-acetylene rig ?

    • Low-top shoes

    • Short-sleeved shirt

    • Cotton clothing

    • Three. Cuffed trousers

    Correct Answer
    A. Cotton clothing
    Explanation
    Cotton clothing is the correct answer because it is a breathable fabric that helps to protect the wearer from sparks and hot metal fragments that may be produced during the cutting process. Cotton is also less likely to catch fire compared to other materials, making it a safer choice when working with an oxy-acetylene rig.

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  • 26. 

    Orifice flanges are to be installed with the taps facing in what direction?

    • Down

    • Ups

    • According to specifications

    • Each side

    Correct Answer
    A. According to specifications
  • 27. 

    The vial in the center of a spirit level is used to determine if a surface is

    • Plumb

    • Vertical

    • Level

    • Offset

    Correct Answer
    A. Level
    Explanation
    The vial in the center of a spirit level is used to determine if a surface is level. A spirit level is a tool that contains a vial filled with liquid and an air bubble. When the bubble is centered between the two lines in the vial, it indicates that the surface is level. This means that the surface is neither tilted nor slanted, but rather it is horizontal and parallel to the ground. Therefore, the correct answer is "level".

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  • 28. 

    What type of grinder is designed to reach into small areas with limited workspace?

    • Wachs grinder

    • Angle grinder

    • End grinder

    • Pneumatic vertical grinder

    Correct Answer
    A. End grinder
    Explanation
    An end grinder is designed specifically to reach into small areas with limited workspace. It has a compact design that allows it to access tight spaces and corners easily. This type of grinder is commonly used for precision grinding, deburring, and polishing tasks in industries such as metalworking and woodworking. Its small size and maneuverability make it ideal for intricate and detailed work where other grinders may be too large or cumbersome to use effectively.

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  • 29. 

    What is the purpose of a high-point vent during hydrotesting?

    • To maintain and control water pressure in the upper part of the pipe

    • To bleed out the air from the system that is being hydrotested

    • To control the directional flow of pressurized water throughout the pipe

    • To serve as an entry point for filling the pipe with hydrotest water

    Correct Answer
    A. To bleed out the air from the system that is being hydrotested
    Explanation
    A high-point vent is used during hydrotesting to bleed out the air from the system that is being tested. When a pipe or system is filled with water for hydrotesting, air can get trapped inside. This air can affect the accuracy and reliability of the test results. By having a high-point vent, the air can be released, allowing the system to be filled with water completely and ensuring accurate test results.

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  • 30. 

    A pre-hydro testing checklist will contain all of the following requirements EXEPT ?

    • All valves and blinds are installed properly

    • Piping system matches ISOs orthographics and P&IDs

    • There is air vent at the high point in the system

    • All welds are insulated an jacketed

    Correct Answer
    A. All welds are insulated an jacketed
    Explanation
    The pre-hydro testing checklist includes requirements such as ensuring that all valves and blinds are installed properly, ensuring that the piping system matches ISOs orthographics and P&IDs, and ensuring that there is an air vent at the high point in the system. However, it does not include the requirement of all welds being insulated and jacketed.

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  • 31. 

    What type of drawing shows the height, width, and depth of a pipeline?

    • Isometric

    • P&ID

    • Plan

    • Section

    Correct Answer
    A. Isometric
    Explanation
    An isometric drawing is a type of drawing that shows the height, width, and depth of a pipeline. It is a 3D representation of an object, where all three dimensions are shown equally and at a 120-degree angle to each other. This type of drawing is commonly used in engineering and construction to provide a clear and accurate depiction of the pipeline's dimensions and layout.

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  • 32. 

    In what service are safety relief valves ALWAYS used?

    • Water

    • Steam

    • Food

    • Oil

    Correct Answer
    A. Steam
    Explanation
    Safety relief valves are always used in steam services because steam systems operate at high pressures and temperatures. These valves are designed to protect the system from overpressure by releasing excess steam to prevent damage or failure of equipment. Steam safety relief valves ensure that the pressure in the system remains within safe limits, preventing any potential hazards or accidents.

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  • 33. 

    If a 6-inch, 300# flat-face flange is used on a typical valve,

    • The gasket does not have bolthioes

    • Only two bolts must be removed from the flange to install gasket

    • A gasket is never used

    • All the bolts must be removed from the flange to remove the gasket

    Correct Answer
    A. All the bolts must be removed from the flange to remove the gasket
    Explanation
    The correct answer is that all the bolts must be removed from the flange to remove the gasket. This is because a flat-face flange typically requires all the bolts to be removed in order to access and remove the gasket. Removing only two bolts would not provide enough clearance to remove the gasket properly.

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  • 34. 

    What is the takeoff for a 6" x 4" LR reducing 90-degree ell?

    • 4 inches

    • 6 inches

    • 9 inches

    • 10 inches

    Correct Answer
    A. 9 inches
    Explanation
    The takeoff for a 6" x 4" LR reducing 90-degree ell is 9 inches. This means that the branch or outlet of the ell, which is the smaller dimension (4 inches), is located 9 inches away from the main pipe or run, which is the larger dimension (6 inches).

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  • 35. 

    When bolting up a pair of 6-inch flanges that will NOT line up, what tool should be used to assist in lining up the flanges?

    • Two hole pins.

    • Drift pin.

    • Pry bar.

    • Hi-lo gauge.

    Correct Answer
    A. Drift pin.
    Explanation
    A drift pin is a tool that can be used to assist in lining up flanges that do not line up. It is a long, tapered pin that can be inserted into misaligned holes to help guide the bolts into place. The taper of the pin allows it to easily slide into the holes and the length provides leverage to align the flanges. A drift pin is commonly used in construction and engineering projects to ensure proper alignment and connection of flanges.

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  • 36. 

    What are the MOST commonly used elbows?

    • 45 degree short radius

    • 45 degree long radius

    • 90 degree long radius

    • 90 degree short radius

    Correct Answer
    A. 90 degree long radius
    Explanation
    The most commonly used elbows in piping systems are 90 degree long radius elbows. These elbows have a larger radius, which allows for a smoother flow of fluid or gas through the pipe. The 90 degree angle is also commonly used in piping systems to change the direction of flow. Short radius elbows have a smaller radius and are typically used in tight spaces where there is limited room for the pipe to curve.

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  • 37. 

    Glass lined pipe is used primarily in:

    • Refineries

    • Chemical and food proccessing

    • Water treetment

    • Power plants

    Correct Answer
    A. Chemical and food proccessing
    Explanation
    Glass lined pipe is primarily used in chemical and food processing industries. This is because glass lining provides excellent resistance to corrosion and chemical attack, making it suitable for handling corrosive substances and ensuring the purity of food products. Glass lined pipes also have a smooth surface, which prevents the build-up of deposits and allows for easy cleaning. Therefore, the use of glass lined pipe in chemical and food processing industries helps to maintain product integrity, ensure safety, and improve overall efficiency.

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  • 38. 

    What is the by product of a steam system?

    • Condensate

    • Nitrogen

    • Oxygen

    • Vapor

    Correct Answer
    A. Condensate
    Explanation
    In a steam system, condensate is the byproduct. When steam is used for heating or power generation, it transfers heat and energy to the surrounding environment. As a result, the steam condenses back into water, which is known as condensate. This condensate is collected and reused in the system, reducing water consumption and improving efficiency. Nitrogen and oxygen are gases that are not directly produced by a steam system, and vapor is simply another term for steam itself.

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  • 39. 

    Four-leg jack stands are designed to hold

    • Structural steel beams

    • 2-inch to 4-inch pipe

    • 8-inch to 24-inch pipe

    • 36-inch to 48-inch pipe

    Correct Answer
    A. 8-inch to 24-inch pipe
    Explanation
    Four-leg jack stands are designed to hold 8-inch to 24-inch pipes. These jack stands are specifically designed to provide stability and support for pipes within this size range. They are constructed with four legs to ensure a sturdy base and are capable of securely holding pipes with diameters ranging from 8 inches to 24 inches.

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  • 40. 

    Which one of the following is an example of a gravity-flow system?

    • Firewater system

    • Sanitary drain system

    • Cooling water system

    • instrument air system

    Correct Answer
    A. Sanitary drain system
    Explanation
    A gravity-flow system refers to a system where fluids or substances flow naturally due to the force of gravity, without the need for any mechanical assistance. In this context, a sanitary drain system is a prime example of a gravity-flow system. It relies on the downward force of gravity to carry wastewater and sewage from different fixtures in a building to a main sewer line or septic tank. The system is designed with sloping pipes that allow the waste to flow effortlessly, without the need for pumps or other mechanical devices.

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  • 41. 

    During hydro testing , gate valves within a piping system are normally ?

    • Opened half way

    • Used to control the amount of pressure on the pipe

    • Used to ensure the water pressure is within specification tolerance

    • Blocked open

    Correct Answer
    A. Blocked open
    Explanation
    During hydro testing, gate valves within a piping system are typically blocked open. This means that the valve is secured in the fully open position, allowing water to flow freely through the system. By blocking the valve open, it ensures that the pressure from the water being pumped into the system during the test does not cause the valve to close or restrict the flow. This allows for accurate testing of the system's integrity and ensures that the water pressure is evenly distributed throughout the piping system.

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  • 42. 

    What does the abbreviation TOE stand for?

    • Taper One End

    • Thread One End

    • Taper On Ends

    • Thread On Ends

    Correct Answer
    A. Thread One End
    Explanation
    The abbreviation TOE stands for "Thread One End". This means that the object being referred to has a thread on only one end, rather than on both ends.

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  • 43. 

    Steam systems incorporate drip leg and traps to:

    • Remove extra steam

    • Remove condensate

    • Assist in hydrotesting

    • Facilitate valve replacement

    Correct Answer
    A. Remove condensate
    Explanation
    Steam systems incorporate drip leg and traps to remove condensate. Condensate is formed when steam cools down and condenses back into water. If not removed, condensate can cause damage to the system by corroding pipes and equipment. Drip legs and traps are designed to collect and remove this condensate from the system, ensuring efficient and safe operation.

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  • 44. 

    Which one of the following rigging practices should be used to rig a 20-foot long bundle of six #4 rebar rods that will be picked up by a small crane?

    • Use three rigging slings that are double-wrapped and choked

    • Use one rigging sling that is double-wrapping and choked in the center of the bundle

    • Use two rigging slings that are double-wrapping and choked

    • Use four rigging slings that are double-wrapped and choked

    Correct Answer
    A. Use two rigging slings that are double-wrapping and choked
    Explanation
    Using two rigging slings that are double-wrapping and choked is the correct answer because it provides a balanced and secure lifting solution for the 20-foot long bundle of six #4 rebar rods. By using two slings, the weight of the bundle can be evenly distributed, reducing the risk of the load shifting or becoming unstable during the lift. The double-wrapping and choking technique ensures that the slings are securely attached to the bundle, further enhancing the safety and stability of the lift.

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  • 45. 

    Where should liquid Teflon lubricants be applied to pipe threads?

    • On both male and female threads

    • Lubricant should not be applied to pipe threads

    • On female threads only

    • On male threads only

    Correct Answer
    A. On male threads only
    Explanation
    Liquid Teflon lubricants should be applied to male threads only. This is because applying the lubricant to the male threads helps to create a smooth and tight seal when the male and female threads are screwed together. The lubricant reduces friction and makes it easier to tighten the connection, while also preventing leaks and ensuring a secure joint. Applying the lubricant to female threads or not using any lubricant at all may result in a weaker seal and potential leaks.

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  • 46. 

    At what depth is a ladder required for access and egress at an excavation?

    • 2'

    • 4'

    • 5'

    • 8'

    Correct Answer
    A. 4'
    Explanation
    A ladder is required for access and egress at an excavation at a depth of 4 feet. This is because any excavation that is deeper than 4 feet is considered a confined space according to Occupational Safety and Health Administration (OSHA) regulations. In confined spaces, such as excavations, there is a risk of cave-ins and other hazards, so a ladder must be provided for workers to safely enter and exit the excavation.

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  • 47. 

    Socket weld fittings have deep sockets that

    • Require butt welding

    • The pipe slips into for alignment

    • Allow for proper threading

    • Requires special clamps for alignment

    Correct Answer
    A. The pipe slips into for alignment
    Explanation
    Socket weld fittings have deep sockets that the pipe slips into for alignment. This means that the pipe can easily slide into the socket, ensuring proper alignment between the fitting and the pipe. This alignment is crucial for a secure and leak-free connection. The deep socket also provides additional support and strength to the joint. Therefore, the pipe slipping into the socket is a necessary feature of socket weld fittings.

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  • 48. 

    Which of the following should be done before performing a hydrostatic test?

    • Leave control mechanisms in place

    • Leave orifice flanges in place

    • Remove blinds

    • Gag pressure relief valves

    Correct Answer
    A. Gag pressure relief valves
    Explanation
    Before performing a hydrostatic test, it is important to gag pressure relief valves. This is because during the test, the system is filled with liquid, which can create a significant amount of pressure. Gagging the relief valves ensures that they are closed and will not release any pressure during the test, allowing for an accurate measurement of the system's ability to withstand the pressure.

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  • 49. 

    A speader bar with two slings attached is to be used to lift a 2,000-pound concrete beam. The beam will place a 1 ton load on each leg of the sling if the lift angle from horizontal is

    • 90 degrees.

    • 60 degrees.

    • 45 degrees.

    • 30 degrees.

    Correct Answer
    A. 90 degrees.
    Explanation
    When the lift angle is 90 degrees, the load on each leg of the sling is evenly distributed, resulting in a 1 ton load on each leg. As the lift angle decreases, the load on each leg increases, meaning that at angles less than 90 degrees, the load on each leg would be more than 1 ton. Therefore, the correct lift angle to ensure a 1 ton load on each leg is 90 degrees.

    Rate this question:

Quiz Review Timeline (Updated): Mar 21, 2023 +

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  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Jan 14, 2013
    Quiz Created by
    Meno281

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