Engineering

In order to shore the structure effectively, the rescuers must evaluate the weight of what is to be shored. What are some common weights of building materials ?
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is operating with a dominant-pole damping ratio of 0. . design a pd controller so that the settling time is reduced by a factor of . compare the transient and steady-state performance of the uncompensated and compensated systems. describe any problems with your design.
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transistor operation is being discussed. technician a says that when the base of a pnp is connected to ground, the transistor is turned off. technician b says that when the base of an npn transistor has a positive voltage applied to it, the transistor is turned on. who is correct?
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A 35-ft long solid steel rod is subjected to a load of 8,000 lb. This load causes the rod to stretch 0.266 in. The modulus of elasticity of the steel is 30,000,000 psi. Determine the diameter of the rod (precision of 0.00)
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What are often used to check the effectives of CP and are made of the same metal as the structure they are electrically connected to?A) half cellsB) line locatorsC) couponsD) current interruptersE) full cells
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. steam at 160 psia and 6000f expands through a well-insulated turbine to an exhaust pressure of 5 psia. if the mass flow rate is 15 lb/s, and the isentropic efficiency is 0.82, calculate the power produced (in hp; 1hp
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A stirred tank reactor is to be scaled down from5 m3to0. 5 m3. The dimensions of the large reactor are:H/Dt=2. 9,Dl=0. 4 m, N=45rpm. - Calculate the height of the big reactor and the dimensions of the smaller reactor(Dt,DiandH). - Calculate the rotational speed of the impeller in the smaller reactor for the following criteria:- Constant impeller tip speed - Constant liquid circulation rate
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A cylindrical recess around a hole, usually to receive a bolt head or nut
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Find the chordal distance between the graduations for thousandths on the following dial indicators: (a) Starrett has 100 divisions and 138 -inch dial. (b) Brown & Sharpe has 100 divisions and 134 inch dial. (c) Ames has 50 divisions and 158 - inch dial.
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3.1 In each case below, find a string of minimum length in {a, b}* not in the language corresponding to the given regular expression.a. b*(ab)*a*b. (a*+b*)(a*+b*)(a*+b*) c. a*(baa*)*b*d. b*(a+ba)*b*
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A) The phasor form of the sinusoid 20 cos(4t + 139) is 20 . b) Using phasors, the value of 1 cos(20t + 10) 5 cos(20t 30) is cos(20t + ( )). Please report your answer so the magnitude is positive and all angles are in the range of negative 180 degrees to positive 180 degrees. c) The simplified form of the function h(t)= t0 (10 cos40t+35 sin40t)t(t)=0(10 cos40t+35 sin40t)t is cos(40t + ( )). Please report your answer so the magnitude is positive and all angles are in the range of negative 180 degrees to positive 180 degrees. d) The simplified form of the function f(t) = 15 cos(2t + 15) 4 sin(2t 30) is cos(2t + ( )). Please report your answer so the magnitude is positive and all angles are in the range of negative 180 degrees to positive 180 degrees. e) Apply phasor analysis to evaluate the equation i = [20 cos(5t + 60) 20 sin(5t + 60)] A. Please report your answer so the magnitude is positive and all angles are in the range of negative 180 degrees to positive 180 degrees. The value of the equation is i = [ cos(5t + )] A
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largest charge for carbon steel pressure pipe with exothermic weldingA) 10 gramsB) 20 gramsC) 45 gramsD) 15 gramsE) 30 grams
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This is a rounded exterior blend between surfaces: a) Fillet b) Round c) Taper d) Chamfer.
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technician a says the computer uses the tp sensor and ect sensor signals to determine the amount of air entering the engine in a speed-density system. technician b says the computer uses the tp sensor and oxygen sensor signals to determine the amount of air entering the engine in a speed-density system. who is correct?
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use the plant transfer function in ex830 and unity feedback. replace the controller with a pid controller (k*(s z1)*(s 0.5)/s) that will have cl poles that were dominant in ex832. the other pid zero will be close to the fast zero that you found in ex832. find (1) k, (2) the error constant (kv), (3) the steady state error for a ramp input, (4) the other pid-zero location, (5) the steady state error for step input, and (6) the expected time to achieve the final steady-state error based only on the slowest closed-loop pole.
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Assume that you just wrote the following MARIE program: LOAD 209 ADD 20A STORE 20B HALT 1022 0026 0000 (a) Your program has been assembled and stored in the memory starting at the address of 205. Draw your memory contents in binary. (b) Write the Register Transfer Notation of the first instruction (LOAD 209). You need to use the given address value instead ofX. What are the values of MAR, MBR, andACand why? (c) Write the Register Transfer Notation of the Fetch cycle if the PC has the value of 206. (refer Figure4.14in page 251 of textbook) What are the values of PC, MAR, MBR, and IR and why?
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A corrosion- inhabitant compound is required to protect the anchor head when
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Question 40 Marks: 1 ______ can be recovered from refuse by burning it in a refractory lined incinerator or water-wall incinerator.Choose one answer. a. glass b. aluminum c. ferrous metal d. energy
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The steel reinforcement (tendons) used for PRE-tensioned members is __________.
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What is the rule of thumb with regards to cribbing height? what is one the greatest advantages of cribbing?
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The layout and installation of post- tension cables
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If the vehicle in front of you is smaller than yours, it can probably:
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technician a says the oxygen sensor (o2s) detects misfires by monitoring the amount of unburned fuel in the exhaust system. technician b says a heating element inside the sensor allows the sensor to reach operating temperature quickly and to maintain its temperature during periods of idling or low engine load. who is correct?
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A pile driver of mass 300 kg is used to drive a pile of mass 500 kg vertically into the ground. The pile driver falls freely through a distance of 54.0 m, rebounding with a velocity relative to the pile and equal to the relative velocity immediately before impact. Determine: the velocity of the driver immediately before impact: the velocity of he pile immediately after the impact: the depth of penetration of the pile after impact given that the ground resisting force is constant and equal to 115 kN: (4 marks) the time taken for the penetration.
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