Ultimate Engineering Study Guide - Questions & Answers

technician a says increasing the reid vapor pressure (rvp) will help the engine start easier in cold weather. technician b says increasing the rvp will increase the possibility of fuel boiling (vapor lock) in summer driving. who is correct?
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Consider a spherical charge that varies as a function of the distancerfrom the sphere's center. The charge within the sphere varis as a function ofronly as shown on the right of the picture: identify the correct statement group of answer choices if the charge varies as f(r) and the electric field varies as f(r) if the charge varies as g(r) then the electric field varies as f(r) if the charge varies as f(r) then the electric field varies as g(r) none of the above if the charge varies as g(r) then the electric field varies as g(r)
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CMC of SDS is 8 mM in water and the CMC of a nonionic surfactant is 0.1 mM. Estimate the CMC of a 1:1 mixture assuming regular solution theory and activity coefficients to be 1. Describe in a few sentences how nonionic surfactant affects the mixed micelle formation
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Storage containers for recyclables must be designed to?Prev ent the entry of rodentsKeep the food handlers bare hands off the food
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g what is the difference between a damped and an undamped vibration? write the appropriate equations.
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technician a says the inertia switch has a reset button that must be depressed for at least one second before the pump will operate again. technician b says the inertia switch is triggered by the abs control module. who is correct?
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4.4 in each of the ideal-diode circuits shown in fig. p4.4, vi is a 1-khz, 5-v peak sine wave. sketch the waveform resulting at vo. what are its positive and negative peak values?
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while observing a concrete pour, an architect notices that the entire concrete load has been deposited from a 6-foot height at the middle of a 40-foot-long form. in this situation, the architect should direct the contractor to
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How is the mathematical analysis of pressure loss in noncircular channels different from circular? Please show equations (S)
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The reaction A - B is to be carried out isothermally in a continuous-flow reactor. The entering volumetric flow rate v, is 10 dm/h. (Note: FA = CAV. For a constant volumetric flow rate v = vo | then FA = CAV. Also, CAo = FA006 = ([5 mol/h][10 dm3/h]) 0. 5 mol/dm3. ) Calculate both the CSTR and PFR reactor volumes necessary to consume 99% of A (i. E. , CA = 0. 01CA0) when the entering molar flow rate is 5 mol/h, assuming the reaction rate -ra is mol (a) ra = k with k = 0. 05 [Ans. : VcStr = 99 dm] h. Dm3 (b) - A = KCA with k = 0. 0001 -1 dm3 (c) -A = kck with k = 300 mol. H [Ans. : VcStr = 660 dm3] (d) Repeat (a), (b), and/or (c) to calculate the time necessary to consume 99. 9% of species A in a 1000 dm constant-volume batch reactor with CAO = 0. 5 mol/dm?
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A helical compression spring has a spring constant of 38.525 N/mm and a free length of 190 mm. The force (N) required to compress the spring to a length of 125 mm is most nearly:A. 2,500 B. 1,500 C. 4,800 D. 6,500
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technician a says number 1 diesel fuel is the most popular and widely distributed. technician b says number 1 diesel fuel is blended with number 2 to improve starting in cold weather. who is correct?
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a noninverting op-amp circuit with a gain of 147 v/v is found to have a bandwidth of 14 khz. for a particular system application, a bandwidth of 32 khz is required. what is the highest gain available under these conditions?
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what is the maximum gage pressure in the odd tank shown in the figure? where will the maximum pressure occur? what is the pressure force acting on the top (cd) of the last chamber on the right-hand side of the tank? a
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a registered engineer is being interviewed for television on a matter relating to his expertise that affects the public safety. the interviewer asks a question about the chances for a cure for aids. the engineer should
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Suppose the thermometer in your apparatus measured freezing point of water as -0.50C Assuming that the rest of your measurements stay the same. how this error would affect the values of the molar masses and van't Hoffs coefficient. Justify your answer showing the calculation of your choice 2. Suppose you had some water drops on the sides of the test tube before you started the experiment. How would your calculated molar be different? Justify your answer -7 -8 59 50 51 62 63 64 65 66 67 268 269 270 271 272 273 274 275 3. Compare the measured value of van't Hoff factor to the theoretical one and explain why there is a difference. Use micro domain approach (particles) and the concept of colligative properties to justify the answer
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what type of axle is also a part of the drivetrain system?
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The variation of temperature in a plane wall is determined to be T(x)=52x+25 where x is in m and T is in C. If the temperature atone surface is 38 C, the thickness of the wall is(a) 0. 10 mb) 0. 20 m(c) 0. 25 m(d) 0. 40 m(e) 0. 50m
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Initially a car travels along a straight road with a speed of 35 m/s. If the brakes are applied and the speed of the car is reduced to 10 m/s in 15 s, determine the constant deceleration of the car
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identify the following electrical components by specifying whether they are input field devices (a) or output field devices (b). group of answer choices push button a solenoid b pilot lamp b selector switch
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Consider the system in the figure, which is initially at vertical equilibrium. The system is excited by the input horizontal displacement z(t) at the end-point C of the horizontal spring k. The bar OAB rotates about the fixed point O. The rotating bar has a length L = 2 m and mass m = 10 kg. Consider that g = 10 kg.m.s?. thuy L/2 b g A L/2 k B z(t) a) Write the linearized equation of motion of the system for small angular displacement e(t). (Symbolic)
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As permitted, installing cables of entirely nonmetallic sheaths into the top of a surface-mounted enclosure through one or more nonflexible raceways, the raceways shall be not less than and not more than in length, provided they meet all of the following conditions: a. Nonmetallic-sheathed cable secured within in from where it emerges from the raceway. b. The raceway comes out of the top of the enclosure and making sure it does not penetrate a C. A fitting is needed at each end of the raceway, and it must remain accessible after the install in order to protect against d. Raceways must be to prevent access into the enclosure through the raceway. in. e. The cable sheath must be and extend into the enclosure at least a f. The raceway must be g. When cable(s) are installed in raceways as mentioned above, what NEC Table and Chapter provide guidance on the cable fill requirements for complete conduit and tubing systems, which this is to be considered. Table Chapter
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the variable resistor ( R0 ) in the circuit in fig. p4.88 is adjusted until the power dissipated in the resistor is 250 w. find the values of R0 that satisfy this condition.
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A researcher exploring whether a training program changes cybersecurity behaviors assigns two groups in an experiment. One of the groups receives a training and the other does not. The group that receives the training is called the ___________ group.
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