Ultimate Engineering Study Guide - Questions & Answers

You're looking at a fault trace in the field. You observe a polished surface with linear grooves on it, and fine powder next to it. In more technical terms, what are you seeing? Choose one: A. slip lineation, slickensides, and fault breccia B. shear zone, fault gouge, and fault breccia C. slickensides, slip lineations, and fault gouge D. slickensides, fault breccia, and fault gouge
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Consider a cogeneration power plant modified with regeneration. Steam enters the turbine at 9200 kPa and 410 0C and expands to a pressure of 871.7 kPa. At this pressure, 0.5 of the steam is extracted from the turbine, and the remainder expands to 14 kPa. Part of the extracted steam is used to heat the feedwater in an open feedwater heater. The rest of the extracted steam is used for process heating and leaves the process heater as a saturated liquid at 871.7 kPa. It is subsequently mixed with the feed-water leaving the feed-water heater, and the mixture is pumped to the boiler pressure. Assume the turbines and the pumps to be isentropic. Determine the following. a.The specific enthalpy at the second pump inlet. b. The enthalpy of the steam enters the process heater. c. The specific enthalpy at the condenser inlet. d. The net work done by the turbine. e. The net pump work. {kJ/kg}
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technician a say used oil filters must be crushed then placed in the container holding waste oil and disposed of according to local regulation technician b says the ingestion of engine coolant can cause serious illness who is correct
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A vehicle with an OHC driven by chain and sprockets is brought into a shop for a noise. While running, a slapping sound is heard from the timing cover. Technician A says that the timing chain may be hitting the cover and this should be addressed right away. Technician B says that timing chains need periodic adjustment and this noise can be corrected without disassembly. Who is correct
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Cracking a fuel line fitting during engine operation is a common diagnostic procedure with a(n) ____________ system.
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When designing a crankshaft, you want to be 99.9% certain that the fatigue limit of the material is in excess of the cyclic stresses it will realize in service. If the experimental fatigue limit for the material is 40 ksi, the actual limit must be at least...
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Air at 290 K, 100 kPa enters a compressor operating at steady state and is compressed adiabatically to an exit state of 420 K, 330 kPa. The air is modeled as an ideal gas, and kinetic and potential energy effects are negligible. For the compressor:a. Determine the rate of entropy production, in kJ/K per kg of air flowingb. The isentropic compressor efficiency.
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One option for protecting a motor-compressor from overloads and failure to start is to use a time-delay fuse or inverse- time circuit breaker rated at not more than ______ percent of the rated load current.
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As described in the previous problem, Refrigerant-134a enters the condenser of a residential heat pump at 800 kPa and 35 0C and leaves at 800 kPa as a saturated liquid. For a particular configuration (not the one you analyzed in the previous problem) which depends on the mass flow rate of refrigerant through the system, the heat rejected to the surroundings is 3.2 kW. If the compressor consumes 1.3 kW of power, what is the COP of the heat pump
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If technology advances, then: A. same output can be obtained from less inputs. B. same output can be obtained through same inputs C. less output can be obtained through more inputs D. more output can be obtained through more inputs.
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The hydraulic gradient is the Group of answer choices ratio between the influx and outflow of water in an aquifer. ratio between the elevation difference and the flow distance in an aquifer. ratio between the porosity and permeability of an aquifer. ratio between the permeability and elevation difference in an aquifer.
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Air passenger carriers currently have a break-even passenger load factor of approximately: Group of answer choices 60% 70% 75% 90% Over 100%
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The elastic modulus, yield strength, ultimate tensile strength, and ductility of a metal can all be determined from (A) an endurance test (B) an impact test (C) a quenching test (D) a standard tensile test
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A window air conditioner uses 1074 W of electricity and has a coefficient of performance of 3.49. For simplicity, let's assume that all of that electrical energy is transformed into work done by the air conditioner to cool a room with dimensions of 7 m times 7 m times 3 m. The air inside this room will initially have the same temperature as the air outside (316 K) and the air conditioner will attempt to cool the room to 295 K. For the purposes of estimation, assume that the air in this room will be cooled at constant volume, that the specific heat of the air at constant volume is 720 J/kg-K, and that the density of the air is 1.2 kg/m^3. How much energy must be transferred out of this room in order to decrease the temperature of the air from 316 K to 295 K? ___________How much work will be done by the air conditioner during the process of cooling the room? ___________How much time in minutes will it take for the room to cool using this air conditioner? _________________How much time in minutes would the cooling process take if instead we used an air conditioner that uses a Carnot cycle that operates between 316 K and 295 K? ____________
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Consider a single pane window in a room where the air is maintained at 25 deg C. The convection coefficient between the room air and the window is 6.2 W/m^2/K. The window pane is at 12 deg C. The window is 0.95 m tall and 1.5 m wide. Required:a. Estimate the rate at which heat is lost through this widow by convection. b. Also estimate the radiation exchange between the room's walls and the window. The emissivity of glass at or around room temperature is 0.94. State any assumptions you might need to make before proceeding.
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Technician A says the American Petroleum Institute has established an oil viscosity classification system. Technician B says thick viscosity oils receive high rating numbers. Who is correct
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What is the approximate ductility (%EL) of a brass that has a yield strength of 275 MPa (40,000 psi)
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Rapid mixing facilities in a rapid sand filtration plant must be designed to achieve a minimum hydraulic residence time of 30 seconds. For a water production rate of 500,000 gallons per day, determine the dimensions of rapid mixing tanks. There should be a minimum of two tanks in parallel for reliability. Use a square tank configuration with the depth equal to 1.25 times the width.
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Stopping Sight Distance on Horizontal Curves. As SR361 enters Middletown from the NW, it must curve to the south between two historic buildings. At this point, SR361 consists of two 11-foot lanes. The building to the right of traffic is only 10 feet from the edge of the 5-footwide shoulder. Local policy is that the superelevation rates not exceed 6 percent. Required:Will the minimum SSD be available for vehicles moving at 60 mph through this curve?
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A power screw is 25 mm in diameter (major) and has a pitch of 5 mm. a. Find the thread depth, the thread width, and mean and minor diameter, the lead, provided that signle square threads are used. b. Repeat part (a) for Acme threads
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Moist air initially at 1258C, 4 bar, and 50% relative humidity is contained in a 2.5-m3 closed, rigid tank. The tank contents are cooled. Determine the heat transfer, in kJ, if the final temperature in the tank is (a) 1108C, (b) 308C
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why is excessive moisture in steam undesirable in steam turbines what is the moisture content allowed
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Determine the COP of a refrigerator that removes heat from the food compartment at a rate of 4800 kJ/h for each kW of power it consumes. Also, determine the rate of heat rejection to the outside air (kJ/h).
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A balanced 3-phase line has an impedance of 0.5 j4 Ohms/phase. The line feeds two parallel balanced 3-phase loads. The first load absorbs a total of 691.2 kW and -201.6 kVAR. The second load is delta-connected and has an impedance of 622.08 j181.44 Ohms/phase. The line-to-neutral voltage at the load is 7200 Vrms. Find the magnitude of the line voltage at the source end of the transmission line.
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