Automotive Technology: A Systems Approach (MindTap Course List)
6th Edition
ISBN: 9781133612315
Author: Jack Erjavec, Rob Thompson
Publisher: Cengage Learning
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Chapter 7, Problem 3RQ
Which of the following offer(s) the least protection for your eyes?
- Face shield
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A cylindrical pin made from 1010 steel and a diameter of 0.188 inches is partially placed in a bushing as seen in the image. The bushing is rigid and does not move.
If a 50 lb weight is dropped on the 0.2 inch end of the pin, how high up does the weight have to be dropped from to cause the pin to yield?
I have been told the 0.26" answer the last time I posted this is incorrect
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A pressurized tank of water has a 10-cm-diameter orifice at the bottom, where water discharges to the atmosphere. The water level is
2.5 m above the outlet. The tank air pressure above the water level is 250 kPa (absolute), while the atmospheric pressure is 100 kPa.
Neglecting frictional effects, determine the initial discharge rate of water from the tank. (Round the final answer to three decimal
places.)
-Air
250 kPa
dcm
2.5 m
The initial discharge rate of water from the tank is determined to be 18.683
m³/s.
Chapter 7 Solutions
Automotive Technology: A Systems Approach (MindTap Course List)
Ch. 7 - What is the correct way to dispose of used oil...Ch. 7 - Where in the shop should a list of emergency...Ch. 7 - Which of the following offer(s) the least...Ch. 7 - Which of the following statements about latex and...Ch. 7 - Describe the correct process for lifting a heavy...Ch. 7 - What are bloodborne pathogens and why should...Ch. 7 - List at least five things you should remember when...Ch. 7 - List at least five precautions that must be...Ch. 7 - How should a class B fire be extinguished?Ch. 7 - Where can complete EPA lists of hazardous wastes...
Ch. 7 - Which of the following statements about safety...Ch. 7 - Gasoline is highly volatile highly flammable...Ch. 7 - Technician A says that it is recommended that you...Ch. 7 - Technician A says that used engine coolant should...Ch. 7 - There are many ways to clean parts while they are...Ch. 7 - Federal Right-To-Know Laws concern. auto emission...Ch. 7 - Which of the following is/are important when work...Ch. 7 - Technician A says that the volatility of a...Ch. 7 - Which of the following is not recommended for use...Ch. 7 - List at least five precautions that must be...Ch. 7 - What is the correct procedure for using a fire...Ch. 7 - Technician A ties his long hair behind his head...Ch. 7 - Technician A uses compressed air to blow dirt from...Ch. 7 - Heavy protective gloves should be worn when....Ch. 7 - Proper disposal of oil filters includes. recycling...
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- 10 0/10 points awarded Scored A 3-m-high large tank is initially filled with water. The tank water surface is open to the atmosphere, and a sharp-edged 10-cm-diameter orifice at the bottom drains to the atmosphere through a horizontal 80-m-long pipe. The total irreversible head loss of the system is determined to be 1.500 m. In order to drain the tank faster, a pump is installed near the tank exit. Determine the pump head input necessary to establish an average water speed of 6.5 m/s when the tank is full. Disregard the effect of the kinetic energy correction factors. (Round the final answer to three decimal places.) Water 3 m 10 cm 80 m The required useful pump head is 1.200 m.arrow_forward(30 minutes) Consider a converging-diverging nozzle, which is open to stagnant atmosphere at the inlet and connected to an infinitely large low-pressure reservoir downstream at the outlet (see the figure below). The ambient pressure (pa) is 1 bar, the throat cross section area is 0.1 m². Imagine that the pressure in the low-pressure reservoir (p₁) can be changed to regulate the flow in the nozzle. Me Pa=1 bar A₁ =0.1 m² Ae Pv Pe Low pressure reservoir a) It is known that when p₁ = 0.8 bar, the nozzle is choked and the flow in the converging- diverging nozzle is subsonic. Find the exit cross-section area (Ae), the static pressure at the exit (pe) and the Mach number at the exit (Me) for this case. b) Determine the range of vacuum pressure (pv) for which there is a normal shock wave in the diverging section of the nozzle. c) Imagine that a pitot-tube is inserted at the exit of the nozzle. What would be the total pressure reading when: (1) p₁ = 0.8 bar; (2) p, is adjusted such that the…arrow_forward1. Five forces are applied to the solid prism shown in Figure 1. Note that the 30 lb forces are in the plane of the prism's surface and are not vertical. Also note that the end of the prism is not an equilateral triangle. a) Compute the magnitude of the couple moment of the force couple formed by the 30 lb forces. b) Replace all the forces with an equivalent resultant force and couple moment acting at point A, Rand G. Give your answers as Cartesian vectors. Figure 1: 6 in a) G b) R GA B 5 in 5 in 4 in 40 lb 4 in 40 lb A 50 lb 30 lb 5 in E 5 in Yarrow_forward
- 4) Calculate the thrust reduction due to the existence of a shock wave at the exit of the rocket no: given below, compared to the no shock case. P=200kPa I M=1.4 MCI M = 1 T=mle A₂ = 3m²arrow_forward3. (30 minutes) Find the mass flow rate for the converging-diverging nozzle below. A₁=0.1 m² V₁ = 150 m/s P₁ = 100 kPa T₁ = 20°C M>1arrow_forwardQ4. Derive the y-momentum equation for a thin laminar boundary layer using the general form of the y-momentum equation for two-dimensional and steady flow given below. до pu +pv- Əx до др მ dy ду +(x+7) ди дхarrow_forward
- 1) Solve the problem using the superposition method. Check that your answer is correct.For steel, use a Poisson's ratio of 0.3.arrow_forward3. Consider a subsonic compressible flow in Cartesian coordinates where the perturbation velocity potential is given by: 20 $(x,y) = -2π e 1-M sin(2x) √1 - M² The free-stream properties are Vo。 = 200 m/s, p∞ = 150 kPa and T∞ = 250 K. po a. Compute the Mach number at the location (x, y) = (0.8, 0.2). b. Compute the pressure coefficient at the wall at the wall at (x, y) = (0.8,0) using both the = 2 2û | and the small perturbation approximation (Cp = -2). exact relation [Cp = M-1)] andarrow_forwardQ2) (30 minutes) The pressure distribution over a curved surface is given below. Find an expression for the friction coefficient assuming there exists a turbulent boundary layer over the surface with a power law velocity profile as given in the figure. y P/Pmax 1.0 0.5- 0.25 - u = de y б → อ 0.3 1.0 ри 0 = PeUe de dx 8* = 1 - ри PeUe (1-0)ay 0 due -- Ue dx = dy 1 - Ue dy + น dy = (2 + H) = 1 Cf 2 - и Ue dy v2 + + gz = constant 2 Ρarrow_forward
- Q3. A piecewise linear function approximates the velocity profile in an incompressible boundary layer flow over a flat plate, as shown in the figure below. Under the assumption of a constant edge velocity (U) in the streamwise direction (i.e., the x direction), calculate the skin friction coefficient as a function of the Reynolds number. وانه δ со 2/3 Ve Ve u 1- 8* = √² (1 - Du₂) dy pu ри PeUe น 9 = √²* Du (1-7) dy de dx 0 PeUe δ + 0 due (2+0²) = 12/24 Ue dx 8 ≤ 100arrow_forward4. The streamwise velocity component (u) for a laminar boundary layer is given by: u = Ue 8 = b√√x where b is a constant and U is the edge velocity. Obtain an expression for the vertical velocity component (v) at the edge of the boundary layer.arrow_forwardPlease Solve Q1&Q2&Q3arrow_forward
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