Meno
Questions and Answers
- 1.
A run of a screw pipe is being installed in the field. What should be done before inserting a threaded pipe in a fitting ?
- A.
Cut threads deeper
- B.
Apply anti-seize
- C.
Apply a thin coat of oil
- D.
Apply pipe dope
Correct Answer
D. Apply pipe dopeExplanation
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.Rate this question:
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- 2.
Why are regular orfice flanges installed in a pipe ?
- A.
To reduce the pressure on the control valve
- B.
To provide taps for instrumentation
- C.
To increase the flow of product through a section of pipe
- D.
To provide quick installation for a gate and globe valves
Correct Answer
C. To increase the flow of product through a section of pipeExplanation
Regular orifice flanges are installed in a pipe to increase the flow of product through a section of pipe. Orifice flanges have a small hole or orifice in them, which creates a restriction in the flow path. This restriction causes an increase in the velocity of the fluid passing through the orifice, resulting in a decrease in pressure. By installing regular orifice flanges in a pipe, the flow rate of the product can be increased, allowing for more efficient transportation and distribution.Rate this question:
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- 3.
During hydro testing , gate valves within a piping system are normally ?
- A.
Opened half way
- B.
Used to control the amount of pressure on the pipe
- C.
Used to ensure the water pressure is within specification tolerance
- D.
Blocked open
Correct Answer
D. Blocked openExplanation
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.Rate this question:
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- 4.
For personal protection , insulation install on pipes that are hotter than 110% F must be at least ?
- A.
7 ft
- B.
6 ft
- C.
5 ft
- D.
4 ft
Correct Answer
A. 7 ftExplanation
Insulation is installed on pipes to protect against heat loss or gain. When pipes are hotter than 110°F, it is necessary to use insulation that can withstand higher temperatures. The correct answer of 7 ft suggests that insulation installed on pipes hotter than 110°F must have a minimum length of 7 feet to effectively provide personal protection.Rate this question:
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- 5.
A pre-hydro testing checklist will contain all of the following requirements EXEPT ?
- A.
All valves and blinds are installed properly
- B.
Piping system matches ISOs orthographics and P&IDs
- C.
There is air vent at the high point in the system
- D.
All welds are insulated an jacketed
Correct Answer
D. All welds are insulated an jacketedExplanation
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.Rate this question:
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- 6.
On a horizontal run, what type of support is attached vertically from above the pipe ?
- A.
Slide
- B.
Hanger
- C.
Structural
- D.
Base
Correct Answer
B. HangerExplanation
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.Rate this question:
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- 7.
What should be worn when cutting with an oxy-acetylene rig ?
- A.
Low-top shoes
- B.
Short-sleeved shirt
- C.
Cotton clothing
- D.
Three. Cuffed trousers
Correct Answer
C. Cotton clothingExplanation
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.Rate this question:
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- 8.
The standard identification color for piping used in fire protection, Materials and equipment is:
- A.
Blue
- B.
Green
- C.
Yellow
- D.
Red
Correct Answer
D. RedExplanation
The standard identification color for piping used in fire protection, materials, and equipment is red. This color is chosen to signify the importance and potential danger associated with fire protection systems. Red is easily recognizable and stands out, making it easier for firefighters and other emergency personnel to identify and locate fire protection systems quickly during emergencies. Additionally, using a standardized color like red helps ensure consistency and uniformity across different buildings and facilities, making it easier for individuals to understand and navigate fire protection systems regardless of their location.Rate this question:
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- 9.
If the centerline elevation of a 4-inch diameter schedule 40 pipe is 11 feet 7 inches, what is the bottom pipe elevation?
- A.
11 feet 4 1/2 inches.
- B.
11 feet 4 3/4 inches.
- C.
11 feet 6 1/4 inches.
- D.
11 feet 6 3/4 inches.
Correct Answer
B. 11 feet 4 3/4 inches.Explanation
The centerline elevation of a pipe refers to the height of the center of the pipe from a reference point, in this case, it is 11 feet 7 inches. Since the pipe has a diameter of 4 inches, the bottom of the pipe will be lower than the centerline by half of the diameter, which is 2 inches. Therefore, the bottom pipe elevation will be 11 feet 7 inches minus 2 inches, which equals 11 feet 5 inches. However, since the answer options are given in fractions, we need to convert 5 inches to a fraction. 5 inches is equal to 4 3/4 inches. Therefore, the correct answer is 11 feet 4 3/4 inches.Rate this question:
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- 10.
In an excavation 6' deep in type C soil, what is the angle required for sloping the banks?
- A.
1/2 to 1 foot
- B.
3/4 to 1 foot
- C.
1 to 1 foot
- D.
1 1/2 to 1 foot
Correct Answer
D. 1 1/2 to 1 footExplanation
The correct answer is 1 1/2 to 1 foot. This means that for every 1 foot of depth, the banks of the excavation need to be sloped at an angle of 1 1/2 feet. This is necessary to ensure the stability and safety of the excavation, as it helps to prevent soil collapse and cave-ins. The sloping angle helps to distribute the weight of the soil and reduce the risk of the banks collapsing onto workers or equipment.Rate this question:
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- 11.
What is the circumference of a 6-inch schedule 80 carbon steel pipe?
- A.
12 inches
- B.
20 9/16 inches
- C.
20 13/16 inches
- D.
21 inches
Correct Answer
A. 12 inches -
- 12.
What is the takeoff for a 6" x 4" LR reducing 90-degree ell?
- A.
4 inches
- B.
6 inches
- C.
9 inches
- D.
10 inches
Correct Answer
C. 9 inchesExplanation
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).Rate this question:
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- 13.
The needle valve is used to
- A.
Start and stop flow
- B.
Regulate flow
- C.
Relieve pressure
- D.
Regulate the direction of flow
Correct Answer
B. Regulate flowExplanation
The needle valve is used to regulate flow because it has a long, tapered needle-like stem that can be adjusted to control the amount of fluid passing through. By turning the stem, the size of the opening can be increased or decreased, allowing for precise control over the flow rate. This makes it ideal for applications where a fine adjustment of flow is required, such as in laboratory experiments or industrial processes.Rate this question:
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- 14.
A 3-foot 6-inch elevation change is to be made on a 6-inch pipe using 90-degree long radius ells. What is the pipe cut lenght?
- A.
1 foot
- B.
1 foot 11 3/4 inches
- C.
2 feet
- D.
2 feet 11 3/4 inches
Correct Answer
C. 2 feetExplanation
To make a 3-foot 6-inch elevation change on a 6-inch pipe using 90-degree long radius ells, the pipe needs to be cut to a length of 2 feet. This is because each 90-degree long radius ell adds a height of 6 inches to the elevation change. Therefore, by using two ells, the total height added would be 12 inches or 1 foot. Hence, the pipe needs to be cut to a length of 2 feet to accommodate the 3-foot 6-inch elevation change.Rate this question:
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- 15.
Which of the following is the decimal equivalent of 3/4 inch?
- A.
0.25
- B.
0.34
- C.
0.75
- D.
1.41
Correct Answer
C. 0.75Explanation
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.Rate this question:
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- 16.
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?
- A.
Two hole pins.
- B.
Drift pin.
- C.
Pry bar.
- D.
Hi-lo gauge.
Correct Answer
B. 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.Rate this question:
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- 17.
What is the most common flare angle for flared fittings?
- A.
22 1/2
- B.
37
- C.
45
- D.
56 1/2
Correct Answer
C. 45Explanation
The most common flare angle for flared fittings is 45 degrees. This angle allows for a secure and leak-proof connection between pipes or tubing. It is a standard angle used in many industries, including plumbing and automotive, and provides a good balance between ease of installation and durability. Flared fittings with a 45-degree angle are widely available and commonly used in various applications.Rate this question:
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- 18.
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
- A.
90 degrees.
- B.
60 degrees.
- C.
45 degrees.
- D.
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:
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- 19.
What is used to open flanges for the installation of a test blind?
- A.
Hammer and wedge
- B.
C-clamp
- C.
Flange spreader
- D.
Pry bar
Correct Answer
C. Flange spreaderExplanation
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.Rate this question:
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- 20.
What type of drawing shows the height, width, and depth of a pipeline?
- A.
Isometric
- B.
P&ID
- C.
Plan
- D.
Section
Correct Answer
A. IsometricExplanation
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.Rate this question:
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- 21.
A strainer installed in a system is used to catch
- A.
Water
- B.
Oil
- C.
Antifreeze
- D.
Debris
Correct Answer
D. DebrisExplanation
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.Rate this question:
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- 22.
All of the following piping can be joined by grooved couplings EXCEPT:
- A.
Carbon steel
- B.
Fiber glass
- C.
Stainless steel
- D.
Ductile iron
Correct Answer
D. Ductile ironExplanation
Ductile iron piping can be joined by grooved couplings, so it is not an exception. Carbon steel, fiber glass, and stainless steel piping can also be joined by grooved couplings. Therefore, the correct answer is ductile iron.Rate this question:
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- 23.
The angle globe valve is used to:
- A.
Start and stop flow.
- B.
Regulate flow.
- C.
Relieve pressure.
- D.
Regulate the direction of flow
Correct Answer
D. Regulate the direction of flowExplanation
The angle globe valve is designed to regulate the direction of flow. It is commonly used in piping systems where the flow needs to be redirected or changed. By adjusting the position of the valve, the flow can be directed to different pathways or completely shut off. This makes it a versatile valve that can be used for various applications where precise control over the direction of flow is required.Rate this question:
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- 24.
A piping and instrumentation drawing would show which of the following?
- A.
Direction of flow
- B.
Bill of material
- C.
Elevation
- D.
Plan view
Correct Answer
D. Plan viewExplanation
A piping and instrumentation drawing is a detailed diagram that shows the layout and arrangement of pipes, valves, instruments, and other equipment in a system. It provides a plan view of the system, which means it shows the system from a top-down perspective. This allows engineers and technicians to understand the spatial arrangement of the components and how they are interconnected. Therefore, the correct answer is plan view.Rate this question:
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- 25.
When finding the lenght of any side of a right triangle, the Pythagorean theorem states that:
- A.
A^2/b^2 = c^2
- B.
A^2xb^2 = c^2
- C.
A^2-b^2 = c^2
- D.
A^2+b^2 = c^2
Correct Answer
B. A^2xb^2 = c^2Explanation
The correct answer is a^2 + b^2 = c^2. This is known as the Pythagorean theorem, which states that in a right triangle, the square of the length of the hypotenuse (c) is equal to the sum of the squares of the lengths of the other two sides (a and b).Rate this question:
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- 26.
Ductile iron pipe may be cut with
- A.
Hammer and chisel.
- B.
Soil pipe cutter.
- C.
Oxytuel torch.
- D.
Abrasive saw.
Correct Answer
B. Soil pipe cutter.Explanation
Ductile iron pipe is a type of pipe that is known for its strength and durability. It is commonly used in underground and water supply applications. While it can be cut using various tools, a soil pipe cutter is the most suitable option. This specialized tool is designed specifically for cutting pipes and is capable of cleanly and efficiently cutting through ductile iron. The hammer and chisel may be used for other types of pipes, but they are not recommended for ductile iron as they may cause damage or create jagged edges. An oxytuel torch is typically used for welding or soldering, not cutting, and an abrasive saw may be too aggressive and may also cause damage to the pipe.Rate this question:
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- 27.
How will the installer prepare to cut a hole in a header to fit the saddle of the header?
- A.
Lay out the OD of the branch on the branch
- B.
Lay out the ID of the branch on the branch
- C.
Lay out the OD of the branch on the header
- D.
Lay out the ID of the branch on the header
Correct Answer
D. Lay out the ID of the branch on the headerExplanation
The installer will prepare to cut a hole in a header to fit the saddle of the header by laying out the ID (inner diameter) of the branch on the header. This means that the installer will measure and mark the exact size of the branch's inner diameter on the header, ensuring that the hole is cut to the correct size to accommodate the branch.Rate this question:
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- 28.
Trench boxes MUST extend at least how far above the vertical side of an excavation?
- A.
6"
- B.
12"
- C.
18"
- D.
24"
Correct Answer
D. 24"Explanation
Trench boxes must extend at least 24" above the vertical side of an excavation. This is necessary to ensure the safety of workers inside the trench by preventing cave-ins and protecting against falling objects. By having the trench box extend this far above the excavation, it provides a sufficient barrier to prevent any potential hazards from reaching the workers below.Rate this question:
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- 29.
A valve is being rigged for installation in a vertical line. The valve should be rigged so that the flange faces of the valve are
- A.
45 degrees from horizontal
- B.
Vertical
- C.
Horizontal
- D.
45 degrees from vertical
Correct Answer
C. HorizontalExplanation
The valve should be rigged so that the flange faces of the valve are horizontal. This means that the flange faces should be parallel to the ground or floor when the valve is installed in a vertical line. This ensures that the valve can be properly connected to the pipes or other equipment in the system.Rate this question:
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- 30.
ALWAYS test lift an object 1 to 2 inches to ensure that it is
- A.
Heavy
- B.
Balanced
- C.
Light
- D.
Off center
Correct Answer
B. BalancedExplanation
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.Rate this question:
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- 31.
Underground storm sewer pipe is normally installed using what reference point?
- A.
Top of trench elevation
- B.
Pipe invert elevation
- C.
Pipe centerline elevation
- D.
Top of pipe elevation
Correct Answer
A. Top of trench elevationExplanation
The correct answer is "Top of trench elevation." When installing an underground storm sewer pipe, the reference point is typically the top of the trench elevation. This refers to the highest point of the trench where the pipe will be placed. It ensures that the pipe is installed at the correct depth and alignment, allowing for proper drainage and flow of stormwater.Rate this question:
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- 32.
What is the take-off on a 6-inch, 45 degree elbow?
- A.
3/4 inch
- B.
3 1/4 inches
- C.
3 3/4 inches
- D.
6 inches
Correct Answer
C. 3 3/4 inchesExplanation
A 6-inch, 45 degree elbow is a plumbing fitting that is used to change the direction of a pipe by 45 degrees. The take-off on this elbow refers to the distance between the center of the elbow and the point where the pipe begins to change direction. In this case, the take-off is 3 3/4 inches, which means that the pipe will begin to change direction 3 3/4 inches away from the center of the elbow.Rate this question:
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- 33.
What is important to remember when cutting pipe 4 inches in diameter with a portable band saw?
- A.
Cut through the pipe in quater sections
- B.
Hold the portable band saw at a 10-degree angle
- C.
Cut straight through the pipe
- D.
Do not cut 4-inch pipe
Correct Answer
A. Cut through the pipe in quater sectionsExplanation
When cutting a pipe that is 4 inches in diameter with a portable band saw, it is important to cut through the pipe in quarter sections. This is because cutting the entire pipe at once can be difficult and may result in an uneven cut or damage to the saw blade. By cutting the pipe in quarter sections, it allows for more control and precision in the cutting process.Rate this question:
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- 34.
What does the abbreviation TOE stand for?
- A.
Taper One End
- B.
Thread One End
- C.
Taper On Ends
- D.
Thread On Ends
Correct Answer
B. Thread One EndExplanation
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.Rate this question:
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- 35.
What is the by product of a steam system?
- A.
Condensate
- B.
Nitrogen
- C.
Oxygen
- D.
Vapor
Correct Answer
A. CondensateExplanation
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.Rate this question:
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- 36.
According to the blue book, what is the suggested stud lenght for a 4-inch, 300# raised-face flange?
- A.
3 1/6 inches.
- B.
3 1/2 inches.
- C.
3 3/4 inches.
- D.
4 1/4 inches.
Correct Answer
D. 4 1/4 inches.Explanation
The suggested stud length for a 4-inch, 300# raised-face flange according to the blue book is 4 1/4 inches.Rate this question:
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- 37.
An orthographic blueprint can contain all of the following information EXCPECT
- A.
Elevations of lines.
- B.
Coordinates of structure.
- C.
Line number.
- D.
Specifications.
Correct Answer
D. Specifications.Explanation
An orthographic blueprint is a detailed representation of a structure, typically used in architecture and engineering. It includes elevations of lines, which show the vertical height and shape of the structure, as well as the coordinates of the structure, which provide precise location information. Line numbers are also included to help with organization and referencing. However, specifications, which refer to specific details and requirements for materials, dimensions, and construction methods, are not typically included in an orthographic blueprint.Rate this question:
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- 38.
What are the MOST commonly used elbows?
- A.
45 degree short radius
- B.
45 degree long radius
- C.
90 degree long radius
- D.
90 degree short radius
Correct Answer
C. 90 degree long radiusExplanation
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.Rate this question:
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- 39.
All of the following tools are used to bend pipe EXCEPT:
- A.
Hydraulic
- B.
Electric
- C.
Manual
- D.
Pneumatic
Correct Answer
A. HydraulicExplanation
Hydraulic tools are not used to bend pipes. Hydraulic tools use fluid pressure to generate force, typically for tasks such as lifting heavy objects or applying pressure. However, bending pipes requires a different type of tool, such as a manual pipe bender or an electric pipe bending machine. These tools are specifically designed to apply controlled force and create precise bends in pipes. Pneumatic tools, which use compressed air, can also be used for pipe bending. Therefore, the correct answer is hydraulic.Rate this question:
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- 40.
Ladders should be inspected:
- A.
Daily
- B.
Weekly
- C.
Monthly
- D.
Before each use
Correct Answer
D. Before each useExplanation
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.Rate this question:
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- 41.
Where can information about the service, pressure rating, temperature limit, maximum pressure, and class of piping system be located?
- A.
Piping symbols
- B.
Line list
- C.
Line number
- D.
Isometric drawing
Correct Answer
D. Isometric drawingExplanation
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.Rate this question:
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- 42.
In what service are safety relief valves ALWAYS used?
- A.
Water
- B.
Steam
- C.
Food
- D.
Oil
Correct Answer
B. SteamExplanation
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.Rate this question:
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- 43.
When an oxygen bottle is in use, the valve should be:
- A.
Cracked open
- B.
Open one turn
- C.
No more then half open
- D.
Fully open
Correct Answer
B. Open one turnExplanation
When an oxygen bottle is in use, the valve should be open one turn. This means that the valve should be partially opened to allow a controlled flow of oxygen. Opening it fully may result in an excessive flow of oxygen, while keeping it cracked open or no more than half open may restrict the flow too much. Opening the valve one turn strikes a balance between ensuring an adequate supply of oxygen and preventing wastage or excessive flow.Rate this question:
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- 44.
Steam systems incorporate drip leg and traps to:
- A.
Remove extra steam
- B.
Remove condensate
- C.
Assist in hydrotesting
- D.
Facilitate valve replacement
Correct Answer
B. Remove condensateExplanation
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.Rate this question:
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- 45.
The formula for finding the tanget of an angle is:
- A.
Opposite side / hydrothenuse
- B.
Adjacent side / hydrothenuse
- C.
Adjacent side / opposite side
- D.
Opposite side / adjacent side
Correct Answer
B. Adjacent side / hydrothenuseExplanation
The formula for finding the tangent of an angle is the ratio of the length of the side adjacent to the angle to the length of the hypotenuse. This is represented by the expression "adjacent side / hypotenuse."Rate this question:
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- 46.
Which of the following should be done before performing a hydrostatic test?
- A.
Leave control mechanisms in place
- B.
Leave orifice flanges in place
- C.
Remove blinds
- D.
Gag pressure relief valves
Correct Answer
D. Gag pressure relief valvesExplanation
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.Rate this question:
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- 47.
A bend in the piping system is better than using a fitting because it is
- A.
Easier to work with
- B.
Less expansive
- C.
Less restrictive
- D.
Produces less waste
Correct Answer
C. Less restrictiveExplanation
A bend in the piping system is better than using a fitting because it is less restrictive. This means that the flow of fluid or gas through the pipe is not hindered or obstructed as much compared to when a fitting is used. This allows for smoother and more efficient flow, reducing pressure drops and minimizing the risk of clogs or blockages.Rate this question:
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- 48.
How many bolts are needed for a 4-inch, 600# flange?
- A.
4
- B.
6
- C.
8
- D.
12
Correct Answer
C. 8Explanation
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.Rate this question:
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- 49.
A line drawn along the surface of the pipe at division points that serves as a guide for cutting miters and marking contours is known as
- A.
A centerline
- B.
An ordinate line
- C.
A piece mark
- D.
A chalk line
Correct Answer
B. An ordinate lineExplanation
An ordinate line is a line drawn along the surface of the pipe at division points that serves as a guide for cutting miters and marking contours. It helps in accurately measuring and cutting the pipe to fit the desired shape or angle. A centerline is a different concept, used to mark the midpoint or axis of an object. A piece mark is a marking used to identify individual components or parts. A chalk line is a string or cord coated with chalk used to create straight lines on surfaces.Rate this question:
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- 50.
The two main considerations for an accurate hydrotest results are:
- A.
Temperature and humidity
- B.
Temperature and pressure
- C.
Pressure and velocity
- D.
Pressure and volume
Correct Answer
B. Temperature and pressureExplanation
The two main considerations for an accurate hydrotest results are temperature and pressure. Temperature is important because it affects the density and viscosity of the fluid being tested, which in turn can impact the accuracy of the test. Pressure is crucial because it determines the strength and integrity of the system being tested. By applying the appropriate pressure and considering the temperature, a hydrotest can accurately assess the performance and safety of the system.Rate this question:
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Mar 21, 2023Quiz Edited by
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Jan 14, 2013Quiz Created by
Meno281
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