Questions
Q. When doing a let-by test, what are you looking for? (Gas utilisation, Level 3- Diploma...
Q. When doing a let-by test, what are you looking for?
(Gas utilisation, Level 3- Diploma in Plumbing and Heating)
In: Mechanical Engineering
A thin, flat plate that is 0.2 m × 0.2 m on a side is oriented...
A thin, flat plate that is 0.2 m × 0.2 m on a side is oriented parallel to an atmospheric airstream having a velocity of 40 m/s. The air is at a temperature of ∞T∞= 20ºC, while the plate is maintained at Ts= 120ºC. The air flows over the top and bottom surfaces of the plate, and measurement of the drag force reveals a value of 0.075 N. What is the rate of heat transfer from both sides of the plate to the air?
In: Mechanical Engineering
If you were asked to determine a boundary layer height for a given flow at a...
If you were asked to determine a boundary layer height for a given flow at a certain location, which method would you select (approaches may be order-of-magnitude, differential, integral, etc). Describe the reasons for your selection.
In: Mechanical Engineering
Estimate the force acting on a passenger’s window in a commercial jet aircraft due to air pressure differential.
Estimate the force acting on a passenger’s window in a commercial jet aircraft due to air pressure differential.
In: Mechanical Engineering
The volume of a sphere is given by V = 4πr3/3, where r is the radius. Use MATLAB
The volume of a sphere is given by V = 4πr3/3, where r is the radius. Use MATLAB to compute the radius of a sphere having a volume 40 percent greater than that of a sphere of radius 4 ft.
In: Mechanical Engineering
Assuming that the variables a, b, c, d, and f are scalars, write MATLAB statements to compute and display
Assuming that the variables a, b, c, d, and f are scalars, write MATLAB statements to compute and display the following expressions. Test your statements for the values a = 1.12, b = 2.34, c = 0.72, d = 0.81, and f = 19.83.
In: Mechanical Engineering
what is the definition of factor safety, and what does it mean to have a higher...
In: Mechanical Engineering
What does it mean if something is channel-mounted?
What does it mean if something is channel-mounted?
In: Mechanical Engineering
How does one determine “slack time/float time” from a PERT analysis? What does it mean when...
- How does one determine “slack time/float time” from a PERT analysis? What does it mean when a task activity has no “slack time/ float time”
In: Mechanical Engineering
A train is moving in the forward direction at 0.65c. The tracks are 1.5m apart and...
A train is moving in the forward direction at 0.65c. The tracks are 1.5m apart and the light is at the center point between the tracks. An observer is 3m from the train when the beam is no longer visible (observer not in the beam). What half angular spread of the headlight beam does the train’s engineer see? Express in degrees.
In: Mechanical Engineering
What is the condition for self-locking block brake?
What is the condition for self-locking block brake?
In: Mechanical Engineering
Air enters a food dehydration system at condition 1 and exits at condition 2. What is...
Air enters a food dehydration system at condition 1 and exits at condition 2. What is the change in enthalpy (kJ/kg dry air) of the air as it passes through the system: Condition 1: Tdb = 30C; Twb = 15C. Condition 2: Tdb = 100C; Twb = 40C. Select the closest answer.
In: Mechanical Engineering
Which statement correctly describes mirror symmetry boundary conditions in thermal analysis? A. Symmetry boundary conditions require...
Which statement correctly describes mirror symmetry boundary conditions in thermal analysis?
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A. Symmetry boundary conditions require definition of convection coefficient on the faces in the plane of symmetry
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B. Symmetry boundary conditions can’t be used if conduction is modeled
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C. Symmetry boundary conditions do not apply to thermal analysis
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D. No thermal condition must be defined on faces in the plane of symmetry
In: Mechanical Engineering
What are mechanical property parameters and what are physical property parameters? What are their differences?
What are mechanical property parameters and what are physical property parameters? What are their differences?
In: Mechanical Engineering