Figure 1.1 shows a kid riding a bicycle. He has to maintain the balanced of the body by controlling the speed and direction of the bicycle until arrived to destination. Figure 1.1 A kid riding a bicycle (a) Identify the basic component of the system in the Figure 1.1. Controlled ...
20 Aug 2020Which one is correct for throttling process () Internal energy remains constant () Entropy remains constant () Pressure remains constant () Enthalpy remains constant () Temperature remains constant 2. A heat engine receives heat from a source at T = 1273 K and relects the waste h...
20 Aug 2020Consider laminar fluid flow through a circular tube with a condition of uniform heating at the sur- face of the tube (uniform surface heat flux condition). (a) Show that Nup (Nusselt number with respect to tube diameter, D) is constant for thermally fully developed condition in t...
20 Aug 2020A model ship is towed in a laboratory wave basin. How does the drag on the ship depend on the following parameters? L = length of model ship V = volume of water displaced p = water density u = towing speed g = gravity u = water viscosity Use dimensional analysis to create four (4...
20 Aug 2020Two walls of a storage plant composed of insulating material (k = 0.25 KJ/hr-m-oC) with 15 cm thick and concrete (k = 3.2382 KJ/hr-m-oC) with 10 cm thick. The surface temperature on hot side is 35oC and cold side is -10oC. If the area is 8 m square, find the temperature between w...
20 Aug 2020Figure Q1 below shows the equilibrium phase diagram of Lead (Pb)-Tin (Sn) alloy system. 327c Liquid 232 C 183°C Temperature (°C) 61.9 20 60 80 100 (Pb) Composition (wt% Sn) (Sn) Figure Q1 The equilibrium phase diagram of Lead (Pb)-Tin (Sn) alloy system
20 Aug 2020Find the moment equations and reaction of support forces and verify the equations correct or not
20 Aug 2020For a given law of motion of a particle M find a location of a partide for a time t, in sec), trajectory, velocuty, tangential, normal and full acceleration VO, con(et/3) 2 --Cow /3) 3 4 4 2 sin(/3) 37 3 3-1 Tuin(x/6) 3 -3/(x2) -4co(et/3) -141 6nin (nt/6) Scout2/) - 2 - 2 4 cons...
20 Aug 2020A block of mass m = 3 kg is connected by two springs of the same stiffness k = 100 N/m and one damper with damping coefficient c = 25 Ns/m as shown in figure QA1. Figure QA1. Mass-spring-damper system a. Write the equation of motion of the system. [Marks 8] b. Determine the natur...
20 Aug 2020Find Laurent series valid f(x) = 2 4 22(2²732tz) for : a) oalell 6) I
20 Aug 2020The partial pressure of saturated steam in a steam/air mixture is 1.40 bar, while the partial pressure of the air is 0.15 bar. Find: (a) the total pressure of the mixture (b) the temperature of the mixture (c) the air concentration
20 Aug 2020The overall heat transfer coefficient in a process heater is 2.15 kW m-K-, and the temperature of the process fluid is essentially constant at 80°C. Find: (a) the rate at which heat will be transferred by a square metre of heater surface from steam condensing at 1.2 bar (b) how m...
20 Aug 2020A gearbox final drive is subject to a wheel torque (both wheels combined of 980Nm). It has a reduction ratio of approximately 3.35. The two mating gears are module 4mm and the larger gear is 228mm diameter. What is the diameter of the 2nd gear and the number of teeth on each gear...
20 Aug 2020The primary and secondary components of the forces were extracted using a Fourier decomposition (which equivalence to obtaining the coefficients of the primary and secondary forces).Explain the calculations for the forces and moments using your own diagram. Why do we use the magn...
20 Aug 2020Air flows over the plate surface with length x and width b. The streams form a laminar boundary layer with velocity profile approximated by the expression of: U = do anyazy2 i) ii) Determine the constants ao, a, and az, and Calculate the displacement thickness 5*.
20 Aug 2020Mind the moment, shear force and deflection for a uniform beam of length 1 m with Nexural rigidity /20 (Pamº) under non-uniform lond (x) = 5000(1-7)(N/m). One end of the beam is clamped and the other one is supported, Sketch the solution. Solve the problem analytically and using ...
20 Aug 2020Answer TRUE or FALSE and give your reason(s) for the following statements: 1. General classification of polymers into amorphous and crystalline groups gives a practical guideline of processing characteristics. (a) (b) During the polymer processing, the temperature of barrel gives...
20 Aug 2020224 # of interior nodes) no.ol/m Loin Toroc; dI zo at x L Too = 25% p = 980 kg/m3 c= 490 - = 54 W km-k) de ce dx² Governing Equation: &d? I th (to-7)=0 Approximate the interior Temperature Distribution wing Method for ODES. Finite Difference
20 Aug 2020The truncated hollow cone shown in Figure Q1(a) is used in cooling applications and is constructed of copper with a thickness of 0.5 mm. Determine the thermal resistance based on the Fouriers law of one-dimensional heat conduction for heat transfer through the truncated hollw con...
20 Aug 2020a truck was left on th top of a hill without brakes the truck rolls down the hill for 500ft the friction of coefficient between tyres and the road is 0.02. the grade hill is 2.5 what is the speed of the velocity after rolling down 500 feet. a.21.3 miles /hour b.12.7 miles/hour...
20 Aug 2020A rotary motor has been installed on the rooftop air ventilation system. The motor is 600 kg in weight, and operates at 5400 rpm (rotation per minute) in full speed. A noise consultant suggests equipping eight identical spring mounts to isolate the motor from the ground. It is ex...
20 Aug 2020A rotary motor has been installed on the rooftop air ventilation system. The motor is 600 kg in weight, and operates at 5400 rpm (rotation per minute) in full speed. A noise consultant suggests equipping eight identical spring mounts to isolate the motor from the ground. It is ex...
20 Aug 2020The velocity profile for a steady, incompressible, laminar, flat plate boundary layer is described by a cubic law of = 2o any azy2 azy3 Where u is the velocity at distant y and U. is the free stream velocity. Knowing that the velocity gradient of the boundary layer is constant...
20 Aug 2020The First Law of Thermodynamics 1. Write the First Law/conservation of energy equations for the following: 60 a closed system cyclic process, (b) a closed system, (iv) a closed system adiabatic process, (iv) a closed system with no work transfer, (v) an open system (control volum...
20 Aug 2020Sk ho Figure 1. A simple quarter-car suspension model The general motion of a car suspension can be approximately modeled by the following ODE. 1. d²x dx . m dtz kx = 0 where x is the displacement of the tire from equilibrium position, t is time, m = 400 kg is the mass (per tir...
20 Aug 2020ey change of propane heated in piston-cylinder apparatus Propane initially at 3 bar and 30°C fills a piston-cylinder apparatus. The propane is heated until the temperature becomes 90°C. For the propane, determine the (a) heat transfer per unit mass, in kJ/kg (b) change in specifi...
20 Aug 2020Derive the the motion egnation equation into a set of Kutter 2 CRK-2) of the ff system and convert Range kutta 4 (RK4) and
20 Aug 2020An air conditioner operating at steady state takes in moist air at 28ºC, 1 atm and 70% relative humidity. The moist air first passes over a cooling coil in the dehumidifier unit and some water vapor is condensed. The rate of heat transfer between the moist air and the cooling coi...
20 Aug 2020A jet plane travelling at a velocity of 900 m/s at 6 km altitude where the temperature and the pressure are -24°C and 47.72 kPa, respectively, is to be tested in a pressurized tank of carbon dioxide at 20°C. The model is fired like a projectile as shown in figure below and the ai...
20 Aug 2020For a construction project, a civil engineer need to select a steel rod in 5 m length to support maximum tensile force of 30 kN based on safety factor of 3. Table 6 is the properties of steel. [Untuk satu projek pembinaan, seorang jurutera awam perlu memilih satu rod keluli berpa...
20 Aug 2020Write brief notes to explain the function and importance of the following with respect to steam distribution systems: (i) thermal expansion devices (ii) air vents (iii) steam traps (iv) pressure reducing valves (v) pressure relief valves (vi) insulation (lagging). (b) Explain wh...
20 Aug 2020Write brief notes to explain the function and importance of the following with respect to steam distribution systems: (i) thermal expansion devices (ii) air vents (ii) steam traps (iv) pressure reducing valves pressure relief valves (v) (vi) insulation (lagging). (b) Explain why ...
20 Aug 2020G(s) =- (S1) (52) raw bode diagram for twis equeition by hand.Show every Step) 6) Draw the phase angle plot by hend (show every stup)
20 Aug 2020You may need to refer to standard reference books or your own experience to answer parts of this question. (a) Explain the function of the following with respect to refrigeration using the vapour compression cycle: (i) compressor (ii) oil separator/filter cooler (iv) expansion va...
20 Aug 2020Please recommend suitable literature for referencing calculations for speeds/feed rates using HSS cutters on aluminium products for both turning and milling operations.
20 Aug 2020This question is worth 25 marks. 120 Figure 2 Technical drawing of the side view of a toilet-roll holder a. From Figure 2, identify the following. Use the point o as your origin. i. The coordinates of points A, B and C. (3 marks) ii. The equation of circle v. (3 marks) ii. The eq...
20 Aug 2020What two features of the planned drainage provisions for the vessels A, B and C shown in FIGURE 1 are incorrect? 15 bar Condensate return line 25 bar 25 bar Steam Steam main main 12 m Non-return valve FIG. 1
20 Aug 2020This question is worth 25 marks. - A block of stone, with a mass of 6600 kg, is being carried on a light sledge. It is held at rest on a smooth ramp by workers pulling on a rope attached to the block. The ramp makes an angle of 16° with the horizontal, and the rope is parallel to...
20 Aug 2020This question is worth 25 marks. The electrical circuit shown below contains five resistors in - parallel and a voltage source. RS RA - Rz - R2 Ri -ova Figure 1 Schematic representation of resisters in the circuit To calculate the effective resistance of a circuit with resistors ...
20 Aug 2020Water at 15°C is drained from a large reservoir using two horizontal plastic pipes connected in series. The first pipe is 20 m long and has a 10-cm diameter, while the second pipe is 35 m long and has a 4-cm diameter. The I8 m water level in the reservoir is 18 m above the center...
20 Aug 2020dy and Oxy have been At a point on the surface of a metal working lathe stresses calculated as shown in Figure QA1 below. 110 MPa 50 MPa 40 MPa Figure QA1 (After Goodno and Gere) (a) Determine using complex stress equations 1. The principal stresses, the maximum shear stresses a...
20 Aug 2020stress can be defined as a)strain times force b)mass divided by volume c) pressure times length d)none of the above
20 Aug 2020he pressure drop between two locations due to skin friction for an organic liquid flowing through an adiabatic tube is 1.0 x 10 Pa. The density and specific heat of the liquid are 450 kg/m and 1800 J/kg K, respectively. Assuming the system has reached steady state, what is the te...
20 Aug 2020Determine the magnitude and direction of the principal stress (in the xy- plane) of the stress state given by σxx = -100 , σyy = 300, τxy= -150 (all in MPa) . Sketch Mohrs circle in the στ- plane and draw out the main stress in the xy plane. How big is the effective stress accord...
20 Aug 2020Determine the greatest bending stress and bending shear stress for a square tube of thickness 2 mm and exterior length 30 mm and which are loaded as shown in the figure below. Where do these tensions occur? For each tension, specify the position along the beam and the position in...
20 Aug 2020Determine the greatest bending stress and bending shear stress for a square tube of thickness 2 mm and exterior length 30 mm and which are loaded as shown in the figure below. Where do these tensions occur? For each tension, specify the position along the beam and the position in...
20 Aug 2020The results of a tensile test of a 12.5 mm diameter aluminium alloy test bar, with an original cross sectional area of 122.7 mm. are summarized in the following Table Q1; Force 0 5 5 IO 10 IS 15 20 25 30 35.3 33.6 33.8 (kN) Length 50.00 50.00 50.06 50.09 50.12 50.15 50.185 32.00 ...
20 Aug 2020What will be the critical load of the device in the figure, if all the rods are made of the same material and have the same E, I, A? In the figure, circles should be interpreted as torque-free joints.
20 Aug 2020Determine the magnitude and direction of the principal stress (in the xy- plane) of the stress state given by σxx = -100 , σyy = 300, τxy= -150 (all in MPa) . Sketch Mohrs circle in the στ- plane and draw out the main stress in the xy plane. How big is the effective stress accord...
20 Aug 2020maximum Te relo P13-79 the winch W reels in cable at ft/s. If the block that the winch is y determine the velocity of block A. ble at the con och is mounted Fig. P13-81 07 the free end of the rope is being constant speed of 3 m/s. Determine on of slider on the vertical pole when ...
20 Aug 2020