Engineering

For Problem 7.2, calculate the minimum cycle length and the effective green time for each timing stage (balancing v/c for the critical movements). Assume the lost time is 4 seconds per timing stage and a critical intersection v/c of 0.95 is desired
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Compute and plot the SCS triangular unit hydrograph for a 400 acre watershed that has been commercially developed (with a flow length of 1500 ft, slope of 3 percent, and soil group B).
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A shipment of 4,000 kg. (8,820 pounds), of Class 8 (corrosive) material and a shipment of 1,500 kg (3,307 pounds) of a Class 3 (flammable liquid) material are loaded at one loading facility on a freight container, unit load device, transport vehicle, or rail car. What placard(s) must be displayed on the container, device, vehicle, or car
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A vehicle battery is consistently low on voltage. Technician A says to disconnect the battery with the engine running to test for proper alternator output. Technician B says that a loose alternator belt may cause this problem. Who is right
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A food department is kept at -12o C by refrigerator in an environment at 30o C. The total heat gain to the food department is estimated to be 3300 kJ/h and the heat rejection in the condenser is 4800 kJ/h. Determine the power input to the compressor, in kW and the COP of the refrigerator. Is this refrigerator cycle reversible, irreversible, or impossible
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3. Determine the capacity of the lane group described in Problem 2 if the effective green time for this movement is 35 seconds and the total cycle length is 60 seconds.
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In a scenario where you need to monitor the combustion of an engine and are interested in the repeatability of the cylinder stroke and the cylinder moving through the correct points with correct timing, which signal characteristic would you be most interested in
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Determine the Thevenin equivalent as seen from terminals A and B; b. determine the value of RL for which RL dissipates maximum power. (10 pts) R4 A 100 22 R2 78 2.5 V , 3 47
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The primary of a transformer has 120 turns, while the secondary of the same transformer has 300 turns. If the primary receives a current of 20 A from an external power source, what will be the current in the secondary
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Milling cutters with carbide and ceramic cutting edges have a ____ rake angle and can be operated at ____ times faster than a HSS cutter.
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A 7 m long steel column in a building is expected to carry 950 kN. Both ends of the column are held in position and one end is restrained in direction. Design a suitable UC section in grade S355.
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Column A 1. brings evaporator outlet pressure into the valve: brings evaporator outlet pressure into the valve 2. used to secure the thermal bulb to the suction line: used to secure the thermal bulb to the suction line 3. contains the diaphragm, valve tag, and thermal bulb: contains the diaphragm, valve tag, and thermal bulb 4. senses evaporator outlet temperature: senses evaporator outlet temperature 5. determines the amount of superheat that a valve will maintain: determines the amount of superheat that a valve will maintain 6. holds valves components together while providing ports to connect system's refrigerant lines: holds valves components together while providing ports to connect system's refrigerant lines 7. contains superheat spring, needle (pin) and seat, superheat spring adjusting gear: contains superheat spring, needle (pin) and seat, superheat spring adjusting gear 8. moves in and out of the seat to modulate refrigerant flow into the evaporator: moves in and out of the seat to modulate refrigerant flow into the evaporator Column B a. valve body b. external equalizer port c. powerhead assembly d. cage e. thermal bulb f. copper strap g. superheat spring h. needle (pin)
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A unit load of not less than ___ volt-amperes per square foot shall be included for storage spaces in other than dwellings.
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Water enters a horizontal pipe with a rectangular cross section at a speed of 1.00 m/s. The width of the pipe remains constant but the height decreases. 22.5 m from the entrance, the height is half of what it is at the entrance. If the water pressure at the entrance is 3171 Pa, what is the pressure 22.5 m downstream
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A refrigerator with a COP of 3.0 removes heat from the refrigerated space at a rate of 10 kW. Determine the rate of power input.
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Two materials are being tested for their ability to withstand fracture. Material A has a fracture toughness of 45 MPa-m1/2 while Material B has fracture toughness of 32 MPa-m1/2. Inspection shows that Material A has a maximum internal flaw size of 3 mm, while Material B has a maximum internal flaw size of only 0.5 mm. The geometry of the flaw is the same for both (Y is the same). Which material can withstand a larger stress without failing and Why
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Two technicians are discussing bump steer. Technician A says that an unlevel steering linkage can be the cause. Technician B says that if the steering wheel moves when the vehicle is bounced up and down, the steering linkage may be bent. Which technician is correct
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7.51 The fluid dynamic characteristics of an airplane flying 240 mph at 10,000 ft are to be investigated with the aid of a 1:20 scale model. If the model tests are to be performed in a wind tunnel using standard air, what is the required air velocity in the wind tunnel
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Write a function called recent_median. recent_median should \#take as input one parameter, a list of integens. recent_median \#should return the median of the last five numbers in the list. \# \#The median is the middle number when the numbers are sorted. \#For example: \# \# recent_median([6,1,2,9,8,3,4,5,7])5\# \#The last five numbers in the list are:8,3,4,5,7. The median \#of these numbers (that is, the middle number when sorted) is 5. \#Write your function here! def recent_median(int_list):| \#Below are some lines of code that will test your function. \#You can change the value of the variable(s) to test your \#function with different inputs. \# \#If your function works correctly, this will originally \#print:5,35,29, each on its own line print(recent_median([6,1,2,9,8,3,4,5,7]))print(recent_median[15,83,25,63,11,96,35,76,12,13]))print(recent_median([9,21,41,24,96,66,0,54,29,29,77,5]))
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At steady state, conservation of energy asserts the total rate at which energy is transferred into the control volume equals the total rate at which energy is transferred out.TrueFalse
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An automobile weighing 1000 lb empty and 3000 lb fully loaded, vibrates in a vertical direction while traveling at 55 mph on a rough road having a sinusoidal waveform with an amplitude Y ft and a wavelength of 12 ft. Assuming that the automobile can be modeled as a single-degree-of-freedom system with stiffness 30,000 lb/ft and damping ratio zeta = 0.2, determine the amplitude of vibration of the automobile when (a) It is empty (b) It is fully loaded.
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1. Rework the beam deflection problem discussed in lecture Optimization slides. Instead of steel, use aluminum, which has a modulus of elasticity E of 107 psi (one-third that of steel). In class, we found that D and d were about 6 inches and 5.75 inches when steel was used. What are the dimensions of the optimum design if aluminum is used
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A company named RT&T has a network of n switching stations connected by m high-speed communication links. Each customers phone is directly connected to one station in his or her area. The engineers of RT&T have developed a prototype video-phone system that allows two customers to see each other during a phone call. In order to have acceptable image quality, however, the number of links used to transmit video signals between the two parties cannot exceed 4. Suppose that RT&Ts network is represented by a graph. Design an efficient algorithm that given this graph, computes for each station, the set of stations it can reach using no more than 4 links.
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the block has a mass of 30 kg and is released from rest when s = 0.5 m. the mass of the bumpers a and b can be neglected.Determine the maximum deformation of spring A due to the collision. Determine the maximum deformation of spring B due to the collision.
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