Mechanical Engineering question and answers for July 08, 2023
- Q Working from first principles, derive an expression for theefficiency of an Otto Cycle engine in terms of compression ratio.Sketch the P-V diagram for this cycle and annotate it using thesame...
- Q Working from first principles, derive an expression for thestagnation temperature of a perfect gas, in terms of flightvelocity, specific heat at constant pressure and the ambienttemperature.
- Q staybolts are most commonly used in ------ boilers.
- Q a) Describe briefly how to develop a sensor using strain gauge.Your answer should be supported with figure(s) and block diagramshowing the mechanical and electrical relation of the sensor [5marks) Subject...
- Q Assess in details, the relevance of Mechanical Engineering toother disciplines going by the new technological trends.
- Q If one side of the cavity wall of a Helmholtz resonator is amass-spring oscillator, what will be natural frequency of theresonator?
- Q Preamble:Nico Case is an industrial engineer working in Vancouver, BC.Ms. Case is responsible for the design and development of a newwarehousing operation for a national manufacturer of yoga clothing.Nico has...
- Q 1. When recovery/recycling equipment is used to removerefrigerant from a mobile A/C system, how much lubricant will beremoved during operation?A. 4 ouncesB. Generally, very lttle, if anyC. The complete system...
- Q Q 418. Using an LCG generator with parameters a: 21, m: 100, c:13 and x0: 7 generate (if possible) a random variate from each ofthe following distributions. For each sub...
- Q A horizontal pipe with a diameter of 4 inches abruptly connectsto a larger pipe of 12 inches in diameter in an industrialapplication.The flow is turbulent and the volume flow rate...
- Q Moist air initially at T1 = 140°C,p1 = 4 bar, and relitive humidity = 74% iscontained in a 2.0-m3 closed, rigid tank. The tankcontents are cooled to T2 = 35°C.Determine...
- Q A 3-page paper on some aspect of current science or technology.Papers should be double-spaced, using 12-point type.* Dynamics writing assignment.
- Q Determine the amount of axial force (in N) to causebuckling-failure for a Long or Intermediate Column. (Hint: Only twobuckling methods, Euler or Johnson, but determine which method youneed to use...
- Q Howdo we eliminate the ethical dilemma behind stem cell research
- Q Using MATLAB create a code to locate the centriod and moments ofinteria about the centriod of a stiffened rectangular plate with orwithout cut outs,
- Q As engineers, what success did they change from the presentairbag and the first early airbag?
- Q A.Give the english and SI unit for the following:1) work2) power3) kinetic energy ( particle)4) linear Impulse5)linear momentum6)Angular momentum about a fixed point “O†( particle7)Mass moment of inertia8) 2nd...
- Q Compute the longitudinal tensile strength of an aligned glassfiber-epoxy matrix composite in which the average fiber diameterand length are 0.0155 mm (0.60 × 10-4 in.) and 1.07 mm (0.042 in.),respectively,...
- Q A continuous and aligned fiber-reinforced composite having across-sectional area of 1190 mm2 is subjected to an externaltensile load. If the stresses sustained by the fiber and matrixphases are 144 and...
- Q 2.Define in detail the terms science and technology. How arethese terms different, similar and what is the connection betweenthem? Define in detail the terms invention and innovation. Arethere any differences,...
- Q Â In the Scanning Electronic Microscope (SEM ), how electrons are scattered from the sample (elastic and inelastic)?
- Q Describe the role of a technical workstream lead along with therequired and desired skills to be successful in this position. Aspart of your description include an example of an actualposition.
- Q Explain how the cells of the sponge communicate with each other.(Hint: Relate this to the makeup of the cell membrane.)
- Q What is the heat treatment of metals? what is the benefit of it?why and how it's useful?Please answer in details, please do not write by hand.
- Q A sample of 1095 steel is heated to 1500 degreesFahrenheit. It is cooled to 500 degrees Fahrenheit in one second.Then, it is held at 500 degrees Fahrenheit for 10 hours....
- Q What are the operational steps ofa work cycle?Identify activities and process parameters for each step of theoperation.
- Q State the elements that are common to all mechatronic systemsand state their purpose.
- Q A facility that manufactures fireworks has a large increase inproduction every June, such that their peak electrical demand is101, while in every other month of the year their peak electricaldemand...
- Q 1:Find the convolution output volume size of layer 2 (W2xH2xD2)and 3 (W3xH3xD3)2: Find the convolution output volume size of layer 2 (W2xH2xD2)and 3 (W3xH3xD3)3: Find the output volume size of...
- Q In class, we learned that â€most†of the sun’s radiation happensin the band 0.2 ? ? ? 3µm, and Stephen asked what â€most†means.What proportion of solar radiation (for a...
- Q How does inserting parts to form subassemblies save time indocumenting designs?
- Q How come in free fall you feel weightless even though gravity ispulling down on you? (ignore air resistance when answering thisquestion).
- Q For the solidification of pure gold, calculate the criticalradius (r*) and the activation freeenergy (\Delta G?G*). Assumehomogeneous nucleation conditions. The values of the latent heat offusion and the surface free...
- Q what is the enthalpy value of steam at 1.9 MP and 290 C?
- Q Oxygen is contained in a piston-cylinder system initially at atemperature of 40 oC and a pressure of 150 kPa. Thepiston is 1 m in diameter and initially 20 cm above...
- Q The following design and operating data were taken for a largeindustrial centrifugal water pump:ParameterDesignOperatingFlow Q (m^3/h)800550Head H (m)5524 (after delivery valve)Power P (kW)160124RPM14851485Required water flow rate varies from 500 m3/h...
- Q Refrigerant 134a enters an insulated compressor operating atsteady state as saturated vapor at -20oC with avolumetric flow rate of 0.18 m3/s. Refrigerant exits at9 bar, 70oC. Changes in kinetic and...
- Q There is a vapor compression type refrigeration cycle using therefrigerant HFC 134 a. In the condenser, it is isostaticallycooled, the condensation temperature is 50 ° C., and the condenseroutlet is...
- Q Machine X costs $248,751 and has annual operating andmaintenance costs of $9,980. Machine Y costs $264,500 and hasannual operating and maintenance cost of $5,120. Both machines areClass 39, which specifies...
- Q Consider a double wedge airfoil with a maximum thickness of 5%chord at angle of attack = 0 degrees.a. Determine the approximate chord wise location (x/c) of themaximum thickness that producesthe...
- Q Write a brief note about the type of fits and tolerances inmachine elements subject under mechanical engineering
- Q Part 1. Select an object from your everydaylife that GD&T could be applied to. Attach a graphic image ofit (a photograph, a scanned sketch or a computer generated drawing)in JPEG...
- Q Q4. Explain the concept of kinematic coefficients? Why do weneed to “square†and “cube†the angular velocities, in order toobtain time derivatives using the second order and third orderkinematic coefficients,...
- Q The velocity profile for a steady laminar flow in a circularpipe of radius R given be u=u0( 1- r^2/R^2). if the fluid densityvaries with radial distance r from the centerline...
- Q If you are using a double braid rope that has a breakingstrength of 8,600 pounds, how much can safety be liftedonce a knotis tied in the rope?a. 860b. 2,000c. 1,500d....
- Q Â A request has been received from an external customer for recommendations for linear position control sensors to be used in an explosive environment. For this reason unsafe electrical contacts must...
- Q 1) From the data table given, compute the population standarddeviation, ?.2) From the data table given, compute the Upper Control Limit for s(UCLs)3) From the data table given, compute the...
- Q List five methods you can enhance heat transfer in a duct
- Q A student conducts an experiment boiling water in a 3.96L pot.The Diameter of the base of the pot is 7-3/4†and the height is5-1/8â€.2 Liters of water @ 23°C takes...
- Q #1 A mass measurement system behaves as a second-order system(consisting of a mass = 50g, a spring, and a viscous dampingelement). To determine the damping the ratio, the system wasexposed...
- Q Consider an airfoil in a high-Â?speed wind tunnel. At theminimum-Â?pressure point on the wing, the velocity is 900 ft/s. Ifthe test section flow velocity is 750 ft/s at standard sea-Â?...
- Q a) Briefly discuss how plastic deformation occurs in crystallinematerials. Discuss the important methods of strengthening used in(i) cold rolled 1018 steel, (ii) 2024Al alloy in T6 heat treatedcondition, (iii) brasses,...
- Q The demand for electric power is usually much higher duringthe day than it is at night, and utility companies often sell powerat night at much lower prices to encourage consumers...
- Q refrigerant 134a enters the evaporator of arefrigeration system operating at steady state at -12°C and aquality of 20% at a velocity of 7 m/s. At the exit, the refrigerantis a...
- Q Air enters a turbine operating at steady state at 6 bar, 1600 Kand expands to 0.8 bar. The turbine is well insulated, and kineticand potential energy effects can be neglected....
- Q thermo II questionA jet engine does not produce shaftwork; how is powerproduced?
- Q Refrigerant 134a enters an insulated compressor operating atsteady state as saturated vapor at -26oC with avolumetric flow rate of 0.18 m3/s. Refrigerant exits at8 bar, 70oC. Changes in kinetic and...
- Q Gd and TCircle T if the statement is true. Circle F if the statement isfalse.1.     The MMB and LMB symbols are onlyused if the datum feature has size RMB is...
- Q Create and explain cause and effect diagram for uneven innerdiameter of steel tube?
- Q Consider a vertical plate of dimension 0.25 m × 0.3 m that is atTs= 90°C in a quiescent environment at ?T?= 20°C. In the interestof minimizing heat transfer from the...
- Q Airflow through a long, 0.15-m-square air conditioning ductmaintains the outer duct surface temperature at 10°C. If thehorizontal duct is uninsulated and exposed to air at 35°C in thecrawlspace beneath a...
- Q Write a program usingif-elseif-else statements to calculate thereal roots of a quadratic equation ax^2+bx+c=0
- Q Part 1. Select an object from your everydaylife that GD&T could be applied to. Attach a graphic image ofit (a photograph, a scanned sketch or a computer generated drawing)in JPEG...
- Q The data file contains displacement (in mm)-load (in N) data fora mechanical test that was conducted on an unknown metal. Theinitial length and diameter of the specimen are also given.a....
- Q A pipe carries a mixture of, by kmols,15%C5H12, 25% C8H18,50% C16H34, 10% C32H40.What is the percentage of C5H12 by mass?
- Q 1) Identify the type of steel (alloy?) with valuessimilar to the following:Modulus of Elasticity = 189.75 MPaUltimate Tensile Strenght (UTS) = 740.05 MPaCup Cone FractureToughness = 4.84 MPa2) Identify the...
- Q what is vrv system?
- Q Buckling is a problem for sheet metal used on aircraft skins andwings. Traditionally the skin has been riveted to the structure;however, there are manufacturing methods that allow bonding of skincomposite...
- Q Thermodynamics II
- Q A pipe is carrying liquid at 60 degrees C, that fluctuates inpressure from 0 to 60,000 kPa (non-capped). The inside diameter ofthe pipe is 20 mm and the wall thickness...
- Q Consider an airfoil in a high-Â?speed wind tunnel. At theminimum-Â?pressure point on the wing, the velocity is 900 ft/s. Ifthe test section flow velocity is 750 ft/s at standard sea-Â?...
- Q 2) Breifly discuss expected life for the journal bearings fromH10 problem 2) compared to equivalent ball bearings from problem 1)above.
- Q A historically devastating environmental event occurred in 2010.System failures in a British Petroleum (BP) oil platform in theGulf of Mexico led to the release of significant amounts of oilinto the...
- Q Polypropylene (PP)Polypropylene Homopolymer (PP Homo)High Impact Polystyrene (HIPS)High-Density Polyethylene (HDPE)Linear Low-Density Polyethylene (LLDPE)Extruded Nylon (Nylon 6/6)Glass Fiber (30%) Filled Nylon 6 (GF Nylon 6)Acrylonitrile-Butadiene-Styrene (ABS)Which of the above material is...
- Q In aircraft accident investigation, an Air Detective Tip alluded to the investigative risk of “hindsight biasâ€. What does this mean and how could it have an effect on discovery of...
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