Engineering

P9.28 A large vacuum tank, held at 60 kPa absolute, sucks sea- level standard air through a converging nozzle whose throat diameter is 3 cm. Estimate (a) the mass flow rate through the nozzle and (b) the Mach number at the throat.
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Fuel lines supply fuel to the throttle body or fuel rail and return excess fuel and vapors to the tank. Which of the best describes fuel and vapor lines?A. Copper or aluminum tubing B. Seamed steel tubing C. PVCD. Rigid or flexible
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Write the code using the do-while loop to force the user to enter a number in the range [20,50]
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A security engineer deploys a certificate from a commercial CA to the RADIUS server for use with the EAP-TLS wireless network. Authentication is failing, so the engineer examines the certificate's properties: Issuer: (A commercial CA)Valid from: (yesterdays date)Valid to: (one year from yesterdays date)Subject: CN=smithco.comPublic key: RSA (2040 bits)Enhanced key usage: Client authentication (1.3.6.1.5.7.3.2)Key usage: Digital signature, key encipherment (a0)Which of the following is the MOST likely cause of the failure?A. The certificate is missing the proper OID.B. The certificate is missing wireless authentication in key usage.C. The certificate is self-signed.D. The certificate has expired.
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Calculate the pressure of dry O2 if the total pressure of O2 generated over water is measured to be 698 Torr and the temperature is 30.1 oC. P(H2O) = 19.8 torr.If the volume of the O2 sample in the question above was 56.3 ml, what volume would the dry O2 occupy at 755 torr (assume the temp was unchanged).
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2 Air enters the compressor of a cold air-standard Brayton cycle at 100 kPa, 300 K, with a mass flow rate of 6 kg/s. The compressor pressure ratio is 10, and the turbine inlet temperature is 1400 K. The turbine and compressor each have isentropic efficiencies of 80%. For k 5 1.4, calculate (a) the thermal efficiency of the cycle. (b) the back work ratio. (c) the net power developed, in kW. (d) the rates of exergy destruction in the compressor and turbine, respectively, each in kW, for T0 5 300 K.
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When selecting the appropriate gear for intended direction of travel, automatic transmission equipped vehicles should be placed in _______ while manual transmission equipped vehicles should be placed in ______. a) Drive, first gear b) First gear, second gear c) First gear, drive d) Second gear, first gear
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A 40kg steel casting (Cp=0.5kJkg-1K-1) at a temperature of 4500C is quenched in 150kg of oil (Cp=2.5kJkg-1K-1) at 250C. If there are no heat losses, what is the change in entropy of?(i) The casing.(ii) The oil.(iii) Both considered.
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determine if the fluid is satisfied
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Hy trnh by cc b phn chnh trong mt b iu khin in t (ECU) dng trn t. Cho bit cng dng ca tng thnh phn.
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Question 74Which of the following would be required when towing a person on water skisbehind a PWC rated for two people?Apower winchBreboarding ladderrearview mirror (at least four inches by four inches)Drectangular red flag with a white diagonal stripeSupport
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8- Concentration polarization occurs on the surface of the.......a- cathode.b- anode.C- bothd-ption 4
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A 2-stage dcv that has an internal pilot does not work well (if at all) on
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State the factor that influence the frequency of the induced emf of an alternating quantity
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The input sin(20) is sampled at 20 ms intervals by using impulse train sampling: i. Construct the input and sampled signal spectra.
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can you guys please introduce yourself
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17- The cathodic polarization is ..... *Oa- activation.Ob- concentrationO c- both.
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What is protection scheme?
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The impeller shaft of a fluid agitator transmits 20 kW at 430 rpm. If the allowable shear stress in the impeller shaft must be limited to 65 MPa, determine (a) the minimum diameter required for a solid impeller shaft. (b) the maximum inside diameter permitted for a hollow impeller shaft if the outside diameter is 36 mm. (c) the percent savings in weight realized if the hollow shaft is used instead of the solid shaft. (Hint: The weight of a shaft is proportional to its cross-sectional area.)
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While driving your vehicle you see a red-colored traffic sign ahead. The red color means it isA: A sign woming of hazardous waste cleanup activity bruide the roadwayB: A coratruction zone Hazard sign, or a construction to Speed Limitsign.C: A Stop sign, Do Not Enter sign, or Wrong Way sign
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Which statement describes the relay between minerals and rocks ?
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You are responsible for notifying the DMV within 5 days of the sale using a Notice of Release of Liability form if you sell or transfer a vehicle to someone else.
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You toss two coins. If you get heads with the first coin, you stop. If you get tails, you toss it again. The second coin is tossed regardless. What is the ratio of heads to tails?
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By using order of magnitude analysis, the continuity and Navier-Stokes equations can be simplified to the Prandtl boundary-layer equations. For steady, incompressible, and two-dimensional flow, neglecting gravity, the result is delta u/ delta x + delta v/ delta y= 0; u delta u/ delta x +v delta u/ delta y= -1/p(delta u/ delta x)+ v delta^2 u/ delta y^2 Use L and V0 as characteristic length and velocity, respectively. Non-dimensionalize these equations and identify the similarity parameters that result.
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