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engineering
mechanical engineering
october 2019
06

Mechanical Engineering Questions and Answers October 06, 2019

Expert-verified solutions to help you succeed

A conveyor belt at angle = 1 2 deg relative to the horizontal is used to transport gravel. If the acceleration of the belt is a = 0 . 8 m s 2 , determine the minimum coefficient of static friction between the belt and the gravel for the gravel to not slip on the belt as it is being transported.

Question 1 ( 1 0 points ) Steam is supplied, dry saturated at 4 0 bar to a turbine and the condenser pressure is 0 . 0 3 5 bar. Calculate the heat supplied and the work output per kilogram of steam if the plant operates on a Carnot cycle operating with wet steam. A A

A 1 0 feet long beam is subjected to a concentrated load of 1 0 0 kips at 4 feet from one end. The beam is round with a diameter of 5 inch. Find: 1 . The Moment of Inertia for the beam 2 . The maximum Normal Stress at top 3 . The maximum Transverse Shear stress at the center of the beam.

Create the three orthogonal views from textbook: Exercise 6 . 5 . 1 2 in Giesecke - 1 5 t h edition ( page 2 6 6 ) - it should look like this:

spinning clockwise with a constant angular velocity such that the circulation is 5 5 m 2 / s . This flow can now be modeled as lifting flow over a circular cylinder. The freestream density, velocity, and pressure are the same as the ones given in Problem 1 . a . Find the location ( s ) of the stagnation point ( s ) , ( rs , s ) . b . If the span

1 . A subsonic wind tunnel with an area ratio of 1 / 5 . Assume that air density is standard sea level. a . If the test section speed is 4 4 ft / s , calculate the pressure difference between the settling chamber and the test section. b . If the pressure in the settling chamber is 2 2 0 0 lb / ft 2 , calculate the pressure in the test section. c .

Outside air at 3 5 C and 8 0 % relative humidity is to be conditioned by cooling and heating to bring the air to 1 3 C and 5 0 % RH and be supplied to a room, to maintain room conditions within the "comfort zone" at 2 3 C and 5 0 % RH . Using the Psychrometric Chart neatly plot the required air conditioning process and estimate ( a ) the amount of

Consider ( Figure 1 ) . Assume ( M c ) 1 = 5 5 0 l b * f t , ( M c ) 2 = 3 0 0 l b * f t , and ( M c ) 3 = 3 3 0 l b * f t . Part A Determine the resultant couple moment acting on the pipe assembly. Enter the x , y and z components of the resultant couple moment separated by commas. Express your answers in pounc Request Answer Provide Feedback

Find the miller indices for crystal planes in the following hcp crystal structures

2 U We can model potential flow over a jellybean by using a source ( Q ) , vortex ( \ Gamma ) , and sink ( Q ) placed on the x axis as shown below. When combined with uniform flow ( U \ infty ) , the superimposed elementary flows will model flow over a closed shape that resembles a jellybean. For the numerical parts below, use U \ infty = 5 m / s

HW 1 7 _ \ # 3 FBDs Draw FBDs that would be used to answer questions in each box below. - No need to numerically solve either problem - Give each force / couple on your FBD ( s ) a unique label, but use the same label for identical forces / couples - Draw non - engaged ( NE ) reactions on FBD , but cross them out ( \ ( \ mathrm { F } _ { \ mathrm
$HW 1 7 _ \ # 3 FBDs Draw FBDs that would be used$

Question 7 ( 2 0 points ) Cold water at 1 0 C enters a water heater at the rate of 0 . 0 2 m 3 m i n and leaves the water heater at 5 0 C . The water heater receives heat from a heat pump that receives heat from a heat source at 0 C . ( a ) Assuming the water to be an incompressible liquid that does not change phase during heat addition, determine

Problem 2 Thermal System Modelling Hardness and other properties of metal can be improved by the rapid cooling that occurs during quenching, a process in which a heated object is placed into a liquid bath. Consider the quenching process. If the thermal capacitance of the liquid bath is not large, the heat energy transferred from the cube to the

Set angle of tap Choose one flat belt Calculate the tension that appears at the other side of the belt ( T 2 ) using the following Introduce a tension in the belt ( T 1 ) and record its value Change the value of the tension T 1 and repeat the calculation of the T 2 as many times as equation: , T 2 = ( m 1 - ( R 2 R 1 ) m 2 ) g required.

A mass ( m ) of 8 0 Kg is suspended on a rope the rope makes an angle as shown in Figure. i ) Determine the tension T 1 and T 2 on rope using Lami's theorem ii ) Determine the scalar component of the force present due to mass ( m ) along the x and y - axis. Figure 3 ( how to resolve 3 - 4 - 5 traingle ) . Please solve in detail. I am weak in this

I understand the match buyt I am confused on why this process is working. Why are the 4 0 lb and 2 0 lb forces not used in the moment equation if they can cause rotation? I am also confused by what its asking for the coordinates. I attached the work of a cheg answer. 3 . 1 0 8 A 6 1 2 - in . plate is subjected to four loads as shown. Find the

The system sketched below is a very simplified version of the plant of a diesel generator, where the combustion in the chamber pushes a piston that drives a set of gears in order to generate electricity via a generator. Show that if that if J 1 = J 2 = J 3 = J g = 0 ( gears and generator rotor have negligible mass ) , that the shaft connecting

A circular rubber balloon contains air at 3 0 0 K and 1 0 0 kPa. The balloon expands after receiving an unknown amount of heat. The pressure of the air in the balloon does not change, but the final volume is two times that of the initial balloon. Treat air as an ideal gas and ignore rubber. ( a ) What is the final temperature of air? ( b ) What is

4 . Derive the material index with a symbolic shape factor included for the cases below, ( 1 ) light and stiff elastic bending of a simply supported beam; ( 2 ) light and strong elastic bending of a simply supported beam; ( 3 ) light and stiff shaft under torsion; ( 4 ) light and strong shaft under torsion; ( 5 ) ( Optional ) light, stiff and

The mass of the drum wheel A is m 1 , and the masses of B and C are m 2 and m 3 . Friction is ignored. The angle is known. And the acceleration of B is known. Determine the constraint forces on point A . [ Ans . N A x = m 3 R r acos + m 3 gcos s i n [ : N A y = ( m 1 + m 2 + m 3 ) g - m 3 g c o s 2 + m 3 R r asin - m 2 a

2 . A steel bar with a gauge length of 8 inch and a cross section that has a width of 1 inch and a thickness of 1 inch was tested in tension to rupture according to ASTM E - 8 method. The stress - strain diagram is shown helow. Determine the following ( show your work on the stress - strain diagram ) ( a ) modulus clasticity, ( b ) proportional

Part A - Define the compatibility condition An infinitely rigid, weightless beam is supported by three circular posts, as shown. The outer posts are made of A - 3 6 steel, and the central post is made of 2 0 1 4 T 6 aluminum. Prior to loading, all posts have a length of 2 5 0 mm . The system is subjected to a distributed load of 2 0 0 k N m .

how to calculate the ideal heat release rate of a liquid fuel

8 - 3 5 Hot combustion gases enter the nozzle of a turbojet engine at 2 6 0 kPa, 7 4 7 C , and 8 0 m s , and they exit at a pressure of 8 5 kPa . Assuming an isentropic efficiency of 9 2 percent and treating the combustion gases as air, determine ( a ) the exit velocity and ( b ) the exit temperature. Answers: ( a ) 7 2 8 m / s , ( b ) 7 8 6 K

in the given figure the inpaper depth of the gate is 5 m find the height H so that the gate will tip?

Cantilever Edge 2 pound load Calculate Displacement or Calculate Stresses at middle or top / bottom Moments ( I values ) Max Tensile Stress and Compressive Stress Need a diagram and calculations

If the state of plane stress is shown below, ( a ) calculate the principal stresses if 0 = 2 4 0 MPa. ( b ) What is the maximum distortion energy u d = a 2 + b 2 - a b 2 , where a and b are principal stresses,

The temperature distribution along a fin with a sharp tip is given by ( x ) = b where = T - T where x points from fin tip towards the fin base. Show that the fin thickness is given by = ( h k ) x 2 .

1 7 . 4 Calculate the area moments of inertia about the centroidal x - and y - axes for the area shown. ( Ans . I x * * = 1 , 4 6 3 . 1 i n 4 , I y * * = 2 , 1 9 3 . 4 i n 4 )

A cylindrical specimen of some alloy 1 0 mm in diameter is stressed elastically in tension. A force of produces a reduction in specimen diameter of Compute Poisson's ratio for this material if its modulus of elasticity is Solution:

( 6 pts ) Z & T Chapter 6 , 1 . 1 . Verify u g r a d 2 w = grad * ( u g r a d w ) - ( g r a d u ) * ( g r a d w ) Assume three spatial dimensions.

3 - 4 9 . Determine the maximum mass of the crate so that the tension developed in any cable does not exceed 3 kN . Problems 3 - 4 8 / 4 9

At a wind speed of 1 6 m / s , blade radius 1 7 m , rotating at 7 5 rpm . Find the blade tip speed and tip speed ratio

Ex - 1 A loaded two - member steel structure with two element, one inclined downward at 3 0 degrees and the other downward at 6 0 degrees to the horizontal with load P suspended at their connection at 1 m below from horizontal base. The yield stress of steel is 4 0 0 MPa and the Young's Modulus is 2 1 0 GPa . By using the unit dummy displacement

A 9 m high, 8 m wide rectangular gate is located at the end of an open freshwater tank ( see the figure below ) . 9 m 5 m 3 m A 9 m high rectangular gate is located on the right side of an open freshwater tank. The gate is hinged at the top and the bottom is allowed to swing upwards away from the water. A force F pushes the gate to the left, 5 m

An engine working on the Otto cycle is supplied with air at 0 . 5 MPa, 4 0 oC . The compression ratio is 1 0 . Heat supplied is 3 0 0 0 kJ / kg . Calculate the maximum pressure and temperature of the cycle, the cycle efficiency and the mean effective pressure. ( For air, Cp = 1 . 0 0 5 , Cv = 0 . 7 1 8 and R = 0 . 2 8 7 kJ / kg K )

Laboratory # 3 Heat Treating Plain Carbon and Alloy Steels Analyzed five metal samples: SAE 1 0 2 0 , SAE 1 0 4 5 , SAE 1 0 8 0 , SAE 3 1 4 0 , and SAE H 1 3 . Used different heat treatments that involved quenching, tempering at various temperatures ( 3 0 0 C , 7 0 0 C , 1 0 5 0 C ) , and air cooling after reheating. The objective of this

9 . 4 1 Assume the power plant in Problem 9 . 3 3 has a closed FWH instead of the open one. Assume its exit is at \ ( 1 7 0 ^ { \ circ } \ mathrm { C } \ ) and a trap drains the liquid to the condenser. Find the extraction fraction from the turbine and the cycle efficiency. where Problem 9 . 3 3 is: A steam power plant has a boiler exit at \ ( 5 \

A 3 - m wide, quarter - circular gate is used to hold oil in a closed tank shown. If the pressure at the bottom of the tank is 4 5 kPa , determine the minimum force needed to hold the gate closed. Neglect the weight of the gate. Note: The pressure at A is NOT zero.

A solid shaft is to transmit 7 5 0 KW at 2 0 0 r e v m i n . If the shaft is not to twist more than 1 0 on a length of twelve diameters and the shear stress is not to exceed 4 5 M N m 2 . Calculate the minimum shaft diameter required. G = 8 4 G N m 2 ( 1 5 marks )

3 - 2 5 . For the vectors shown in Figure P 3 . 2 5 , graphically determine the resultant, R = A + > B + > C + > D + > Es 3 - 4 8 . For the vectors shown in Figure P 3 . 2 5 , graphically det - ermine the vector, J = C + > A B + > D E .

Q 3 . Please use miter line to get the top view. ( Use metric graph paper and redraw the Front Homework Description: Multiview Drawings For this assignment, you are required to create detailed multiview drawings of the given object ( s ) . Ensure that you provide accurate and clear front, top, and side views, including all necessary details such

4 . You are trying to make an aluminum heat exchanger fin behave as a super - hydrophobic surface, so it will repel condensate. Your lab mate, who completed a master's degree at Purdue, suggests you use sandpaper to increase the surface roughness. Please explain whether the suggested approach will work, and if not, discuss alternatives by which

As part of the Dinos Football offseason training program, athletes are required to perform 6 1 0 sets of 7 0 kg weighted ( mg ) seated leg extensions. The team's physiotherapist has raised concerns regarding the number of injuries resulting from this exercise, so she has decided to analyze the muscle forces ( F M ) , joint reactions ( R x and R Y

PUNTO 2 Para la viga que se muestra en la figura, determine a ) el esfuerzo flector m ximo por tensi n y por compresi n , b ) el esfuerzo cortante m ximo debido a V y c ) el esfuerzo cortante m ximo en la viga. Secci n transversal agrandada CS Escaneado con CamScanner

( b ) Water flows at the rate of 8 5 k g m i n through a double pipe counter flow heat exchanger. Water is heated from 5 0 C to 9 5 C by an oil flowing through the tube. The specific heat of the oil is 1 . 6 8 0 k J k g . K . The oil enters at 1 5 0 C and leaves at 8 5 C . The overall heat transfer co - efficient is 4 5 0 W m 2 K . Calculate heat

G 1 7 . Figure P 6 . G 1 7 shows a pump and piping system. The pump is to move ethylene glycol at a flow rate of 3 . 1 5 5 1 0 - 3 m 3 s . Follow the suggested design procedure and select a pump for the case when z 1 = 1 . 2 2 m and z 2 = 3 . 6 6 m . Solve by SI unit FIGURE P 6 . G 1 7 Notes: A Globe valves B Union fittings C , F 3 2 concentric

A person is doing knee extension exercise by lifting a heavy object. At this moment, the leg is holding still. The weight of the lower leg is \ ( \ mathrm { W } _ { 0 } = 2 0 0 \ mathrm { ~N } \ ) and the weight of the heavy object is \ ( \ mathrm { W } _ { 1 } = 3 0 0 \ mathrm { ~N } \ ) . The object contacts foot at point A , while the center of

The cantilever beam consists of a rectangular structural steel tube shape [ [ : E = 2 1 0 GPa; I = 1 5 1 1 0 6 m m 4

4 / 8 0 The elements of a bieycle center - pull brake are shown in the figure. The two brake arms freely rotate about fixed pivots at C and D ( the support bracket is not shown ) . If the brake - cable tension applied at H is T = 1 6 0 N , determine the normal forces exerted on the wheel by brakepads E and F .

Q 2 . A mechanical Member is made of a brittle material. It is loaded such that the principle stresses ( 1 , 2 ) are 1 5 0 MPa and - 2 0 0 MPa respectively. Use the graphically represented theories in Figure 2 of failure to find the design factor used with a - Brittle Coulomb Mohr Theory b - Modified Coulomb Mohr Theory Note: Figure 2 is drawn to

( bonus , 2 0 points ) If the distribution of the ground reaction on the pipe per foot of length can be approximated as shown. Answer the following question: ( a ) Determine the magnitude of the resultant force due to this loading. 2 2 3 . 2 lb

Plot the trajectory in the k x k y plane ( ignoring the k z dimension for this part ) .

Please explain these calculations

A Venturi meter is used to measure water flow in a 3 6 - in diameter horizontal pipe. The throat diameter is 1 2 in . , and the coefficient of velocity is 0 . 9 8 5 . The pressure differential between the pipe and the throat is measured as 4 . 2 l b i n 2 . The flow rate ( f t 3 s e c ) in the pipe is most nearly: A 1 . 6 B 1 9 . 3 C 2 0 . 5 D 4 8

Determine the equivalent state of stress if an element is oriented 6 4 clockwise from the element shown in ( Figure 1 ) . Figure 1 of 1 Solve for x ' . Express your answer in kilopounds per square inch to three significant figures. x ' = ksi Request Answer Part B Solve for y ' . Express your answer in kilopounds per square inch to three

The tension in cable D E is T = 5 0 0 N . For the force that acts at point D , determine ( a ) the scalar projection of T onto line FE , ( b ) the vector expression for the projection of T onto line FE , ( c ) the moment the force T makes at F , and ( d ) the projection of the moment along the the line OF .

Follow up please

Members HK , EF , and CD are welded together as shown and each have a mass of 4 . 8 kg . Given the geometric parameters below and that the angular velocity and angular acceleration of member BC are 1 . 4 rad / s and 8 . 6 rad / s 2 respectively, determine the internal moment at point E in N - m . L = 7 . 6 m , y = 2 . 0 m , = 3 0

A viscous pump is in the shape of a Rayleigh step bearing. Before the slider begins to move, there is contact between the part of the step and the sliding surface,

If there is some heat loss during combustion processes, the product temperature at equilibrium will be ( a ) q , lower, ( b ) q , higher, or ( c ) q , the same compared to the adiabatic flame temperature.

E = 2 0 0 GPa t of the strip if the allowable stress of the steel is 4 2 0 MPa . Answer: t = 0 . 6 4 mm .

Steam flows steadily into a turbine with a mass flow rate of 2 6 k g s and a negligible velocity at 6 MPa and 6 0 0 C . The steam leaves the turbine at 0 . 5 MPa and 2 0 0 C with a velocity of 1 8 0 m s . The rate of work done by the steam in the turbine is measured to be 2 0 , 3 5 0 k W . If the elevation change between the turbine inlet and exit

The handle at E of rigid bar ABCDE is pulled downward so that point A moves up 6 mm . Knowing that rope A H is L 1 = 1 8 0 m m long and the ropes C G and D F are L 2 = 2 8 0 m m long, determine the average normal stain in each rope. Enter the normal strain in rope DF below. Express your answer in mm / mm to the nearest 0 . 0 0 1 m m m m . Your

Question 2 [ 3 0 ] For the plane strain element given in Figure 2 , determine the following: a ) Element stress x , y , x y b ) Principal stress 1 [ 2 0 ] c ) Principal stress 2 [ 3 ] d ) Principal angle P [ 3 ] [ 4 ] The nodal displacements are as follows: u 1 = 0 . 0 0 1 c m , v 1 = 0 . 0 0 5 c m , u 2 = 0 . 0 0 1 c m , v 2 = 0 . 2 5 c m , u 3 =

Back in the alternate universe from HW 7 , when making a batch of Bradium Ezekide gears using conventional processes, the porosity is about 9 % . You have found a way to make this such that the porosity decreases to 6 % . How much does your system improve the stiffness and flexural strength? Be quantitative and show your work. Use the Equations in

With the aid of sketches, distinguish among lift, drag, thrust and torque that wind flow exerts on a blade of a horizontal axis wind turbine ( airfoil blade ) .

The spherical gas tank is fabricated by bolting together two hemispherical thin shells of thickness 3 0 mm . The gas contained in the tank is under a pressure of 2 . 4 MPa . The tank has an inner diameter of 8 m and is sealed with 9 0 0 bolts each 2 5 mm in diameter. ( Figure 1 ) Part A Determine the normal stress developed in the wall of the

Problem 1 . Given: the nonlinear, time - invariant ODE - 2 ? 2 + 2 s i n = 3 t a n + 2 where is the input signal in rad and is the output signal in rad. Determine: ( a ) the equilibrium / trim input, ? b a r ( ) , for the equilibrium / trim output ? b a r ( ) = 2 rad; ( b ) a transfer function model for the linearized, time - invariant system of

7 - 8 8 An insulated piston - cylinder device initially contains 3 0 0 L of air at 1 2 0 kPa and \ ( 1 7 ^ { \ circ } \ mathrm { C } \ ) . Air is now heated for 1 5 min by a \ ( 2 0 0 - \ mathrm { W } \ ) resistance heater placed inside the cylinder. The pressure of air is kept constant during this process. Determine the entropy change of air,

I. There are many types of heating systems. Discuss any six ( 6 ) types of them. ii . A double - panel radiator is to be installed in a room where the air temperature is 2 2 C and the heat loss is 4 5 0 0 W . Water flow and return temperatures are to be 8 5 C and 7 5 C respectively. An extract from a radiator manufacturer's catalogue for a

Q 2 An interior zone of a large building is designed to have a supply air - flow rate of 5 0 0 0 c f m ( 2 . 4 m 3 s ) . Thit cooling load is constant at 1 0 tons with a SHF of 0 . 8 year - round. Indoor conditions are ( 2 4 C ) db and 5 0 % ( RH ) . ( a ) What is the maximum air dry bulb temperature and humidity ratio that would satisly the load

Combined loadings Problem 1 Determine the state of stress at point A on the cross section of the pipe assembly at section \ ( a - a \ ) . Show the results in a differential element at the point.

A 4 . 5 9 m long 1 0 0 . 0 mm - by - 3 0 9 . 9 mm , solid rectangular cantilever wooden beam is carrying a uniformly distributed load w ( see Fig below ) , with a mean load intensity of w = 2 . 6 k N m and a COV of W = 0 . 1 5 . The material is structural - grade redwood with a rated average yield strength ( parallel to grain under bending ) of y

Write the title and code of the course. In the process of manufacturing of infant formulation in the form of powder, 1 0 0 g of powder separated using a sieve to get fractions as , 1 0 g of flour with size > 0 . 5 m m ; 2 0 g of 0 . 5 m m ; 2 0 g of 0 . 4 m m ; 2 0 g of 0 . 3 m m , 2 0 g of 0 . 2 m m and 1 0 g on pan. Above powder occupies 1 1 0

The wooden table is made from a square board having a weight of 1 6 lb . Each of the legs weighs 2 . 2 lb and is 3 ft long. Determine how high its center of gravity is from the floor. Also, what is the angle, measured from the horizontal, through which its top surface can be tilted on two of its legs before it begins to overturn? Neglect the

Two bars are used to support a load. When unloaded, A B is 5 in . long, A C is 8 in . long, and the ring at A has coordinates ( 0 , 0 ) . If a load P acts on the ring at A , the normal strain in A B becomes l o n A B = 0 . 0 2 in . / in . , and the normal strain in A C becomes l o n A C = 0 . 0 3 5 in . / in . Determine the coordinate position of

( 2 0 pts ) Two tanks are connected by a valve. One tank initially contains 2 kg of air at 7 7 C and 7 0 kPa . The other tank holds 6 kg of air at 2 7 C and 1 2 0 kPa . The valve is opened and the gases are allowed to mix while receiving energy by heat transfer from the surroundings. The final equilibrium temperature is 4 7 C . Use the ideal gas

Question # 1 : A . Express each of the forces in Cartesian vector form and B . Determine the magnitude and coordinate direction angles of the resultant force.

b ) Consider a process with the following ( forward ) transfer function of a unity feedback system: and the controller: G ( s ) = 1 ( s + 2 ) ( s + 3 ) ( s + 4 ) G c ( s ) = K d ( s + K p K d ) , If the system is designed to satisfy the damping ratio 0 . 6 , use MATLAB to obtain the time constants, T ( not the time period ) , undamped natural

l = 0 . 6 m , a = 0 . 2 8 m , b = 0 . 5 m , F = 2 5 0 N , w = 2 5 0 N / m find M 1 and R 1 and draw V and M diagram. maximum V and M

A y = 3 5 0 l b ; B y = 2 5 0 l b ; P = 6 0 0 l b ; a = 5 f t and b = 7 f t . Draw the shear and bending moment diagrams for the intervals a 0 x and a

Air to ventilate an underground mine flows through a large 2 - m - diameter pipe. A crude flowrate meter is constructed by placing a sheet metal washer between two sections of the pipe. Estimate the flowrate if the hole in the sheet metal has a diameter of 1 . 6 m and the pressure difference across the sheet metal is 8 . 0 mm of water.

s 6 9

Determine the reaction force in member BC . ( a ) 1 9 2 N , ( b ) 1 9 4 N , ( c ) 1 9 6 N , ( d ) 1 9 8 N , ( e ) 2 0 0 N .

For a four bar linkage link lengths are: ground link 6 cm , crank 2 cm coupler 7 cm and output link 9 cm . For crank position of 3 0 and angular velocity of crank of 1 0 rpm find positions and velocities of the linkage for normal and cross positions using NewtonRaphson method. Draw the linkage for the two positions and draw coupler curves for two

Question 2 In the mechanism shown in the figure below, crank O A is 2 0 mm long and rotates clockwise at a uniform angular velocity of 1 0 r a d s e c . Slider D is constrained to move vertically and link A C is pin jointed to a horizontal slide at B . Links A B , B C and C D are 3 0 m m , 1 5 m m and 6 0 mm , respectively. For the instant when

9 . Lubricating oil at a temperature of 6 0 C enters a 1 cm diameter tube with a velocity 3 . 5 m / s . The tube surface is maintained at 3 0 C . Calculate the tube length required to cool the oil to 4 5 C . Assume that the oil has the following average properties for the temperature range of this problem: = 8 6 5 kg / m 3 , k = 0 . 1 4 W / mK ,

Drawing 2 ( Material: AISI 3 0 4 Steel, Units inches ) THIS CAN BE COMPLETED BY USING ONLY TWO FEATURES. #SOLIDWORKS

a ) what is the relation between the length of stroke and bore and percentages of losses? b ) Discuss the heat balance of engine and what are the types c ) Explain the meaning of engine dieseling 2 d ) If you have two combustion chamber designs , which case has higher combustion efficiency, and why?

Polycrystalline copper has a steady - state creep rate of 1 E - 4 / s at 5 6 0 degrees C when subjected to a given tensile stress. The activation energy, Qc , for creep in copper is 1 9 7 kJ / mol . Calculate the steady - state creep rate of copper at 3 3 1 degrees C at a stress which is 7 4 % higher than the original. Use n = 5 . Report your

A manufacturing process produces parts in batches. The process is operated by a worker whose labor rate = $ 1 5 . 0 0 h r and applicable labor overhead rate = 4 2 % . Estimated cost rate of the machine = $ 0 . 3 7 5 m i n ; OR , Cost rate of the press = $ 2 2 . 5 0 h r and applicable equipment overhead rate = 2 0 % . Batch size = 4 0 0 parts, and

Problem # 1 Represent each of the following as a number between 0 . 1 and 1 0 0 0 using an appropriate prefix: ( a ) 4 5 3 2 0 kN , ( b ) 5 6 8 ( 1 0 5 ) m m , and ( c ) 0 . 0 0 5 6 3 mg . Problem # 2 The screw eye in Fig. 2 - 1 1 a is subjected to two forces, F 1 and F 2 . Determine the magnitude and direction of the resultant force.

5 - 6 7 . The uniform concrete slab has a mass of 2 4 0 0 kg . Determine the tension in each of the three parallel supporting cables when the slab is held in the horizontal plane as shown. Prob. 5 - 6 7

You are required to resolve the force into two non - perpendicular aces by two methods graphically and analytically. Compare and discuss the results feel free to adjust the dimensions of the force if they are too big or too small

Pb adatoms on ( 1 1 1 ) surfaces of Pb can occupy two types of stable sites: HCP and FCC ( see figure below ) . The energy of the adatoms is lower at FCC sites than at HCP sites. The atoms can move from FCC sites to neighboring HCP sites ( and vice versa ) by thermally activated migration across a bridge site. The energy of the adatom on the

QUESTION 7 Refrigerant - 1 3 4 a is used in a refrigeration system as a working fluid. Refrigerant enters the coils of the evaporator as a saturated liquid - vapor mixture at a pressure of 1 5 5 kPa and leaves as saturated vapor at the same pressure. The refrigerant absorbs 2 1 7 kJ of heat from the cooled space, which is maintained at \ ( - 1 5 ^

Q 4 ) A closed 0 . 4 m diameter cylindrical tank completely filled with oil ( \ ( \ mathrm { SG } = 0 . 9 \ ) ) rotates about its vertical longitudinal axis with an angular velocity of \ ( 4 0 \ mathrm { rad } / \ mathrm { s } \ ) . Determine the difference in pressure just under the vessel cover between a point on the circumference and a point

Question 4 1 0 pts The magnitude of the resultant force, in kN , on the left end of the 8 in . pipe is about : 2 7 1 1 8 9 0 5 7 3 Question 1 to question 4 is for problem 1 Two nozzles having diameters of 4 in ( 1 0 . 1 6 cm ) and 6 in ( 1 5 . 2 4 cm ) , respectively, discharge horizontally into the atmosphere with a velocity of 1 5 m s . The

The 7 m long cable is anchored to the ground at A as shown in ( Figure 1 ) . If z = 3 . 5 m , determine the location + x , + y of point A Choose a value such that x = y Express your answer to three significant figures and include the appropriate units . 0

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