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968/5000 The employer assigned the task
of a design project to a New Graduate Mechanical Engineer so that
the gear wheel in the gearbox they produced can be connected to the
carrier shaft with a TRANSVERSAL WEDGE. Shaft diameter, power,
number of revolutions are given by the formulas below. For gear
wheel body Pem = 70 N / mm2, Tem = 120 N / mm2, Transverse Wedge
material Pem = 50 N / mm2, Tem = 100 N / mm2, Shaft material Pem =
80 N / mm2, Tem = 150 N / mm2 is. The core diameter (DG) will be
taken 3 times the shaft diameter (d). The distance to the edges of
the key shaft (e1) and hub (e2) is equal to each other and this
distance will be taken as d shaft diameter. Since the transverse
wedge used is not standard, the company will use the transverse
wedge produced in-house. The wedge width / wedge thickness ratio is
5, and the slope on the wedge surfaces is 1/100. For a safe
connection, make the dimensioning of the wedge and just draw the
manufacturing picture of the wedge in 1: 1 scale. The friction
coefficient on the surfaces will be = 0.12.Shaft diameter (d) = 120
mmPower (N) = 3.7 kWSpeed (n) = 530 (rev / minute)
1.) Four levels are used for the transmission of a baseband
digital signal: -1 V, 0V, 1 V, and 3
1.) Four levels are used for the transmission of a baseband
digital signal: -1 V, 0V, 1 V, and 3 V. In the transmission medium,
AWGN with an effective value of 2 V is accepted.Find the total
error probability by plotting the probability density function of
the signal received at the receiver when the center-point sensor is
used.2.) Using a database-pole transmission at 9600 bpstransmitted.
The communication channel has a bandwidth of 9600 Hz, and the AWGN
with No / 2 = 10 ^ (- 12) Watt / Hz power spectral density on the
channelare available. Since the error probability is desired to be
less than 10 ^ (- 5), find the required transmission power.3.) In a
three-level transmission system, p (t), 0 and -p (t) pulses are
used to transmit symbols. Compatible filter receiver is used for
this system. Pulse energy is indicated by Ep and communication
There is AWGN with No / 2 power spectral density in its
environment.In this case, find the threshold values that will
provide the lowest error probability and the total symbol error
probability.
The gear wheel in the gearbox they produce will be connected
to the carrier shaft (transverse wedge).. Shaft diameter, power,
The gear wheel in the gearbox they produce will be connected
to the carrier shaft (transverse wedge).. Shaft diameter, power,
number of revolutions are given below by formulas. Gear wheel
housingfor Pem = 70 N / mm2 tem = 120 N / mm2 Transverse Wedge
material Pem = 50 N / mm2, tem = 100 N / mm2 Shaft material Pem =
80 N / mm2 tem = 150 N / mm2 Is. Hub diameter (DG)3 times the shaft
diameter (d) will be taken. Distance from wedge shaft (e1) and hub
(e2) sidesare equal to each other and this distance will be taken
as d shaft diameter. The transverse wedge used,Since it is not
standard, the company will use the transverse wedge produced
in-house.The wedge width / wedge thickness ratio is 5, and the
slope on the wedge surfaces is 1/100.For a safe connection, make
the dimensioning of the wedge and only 1: 1 of the wedge.draw the
manufacturing picture. The friction coefficient on the surfaces
will be taken as u= 0.12.Shaft diameter (d): d = 320 [mm]Power
(N): N = 7.7 [kW],Speed (n): n = 930 [d / d]
1. Two solid circular shafts (Gst = 80 GPa) and a solid
circular bronze shaft (Gbr = 40 GPa) are
1. Two solid circular shafts (Gst = 80 GPa) and a solid
circular bronze shaft (Gbr = 40 GPa) are securely connected by a
coupling at C as shown in Figure 1. A torque of T = 10 kN.m is
applied to the rigid wheel B. If the coupling plates cannot rotate
relative to one another, determine the angle of rotation of wheel B
due to the applied torque.
(Kapak is cover. Silindir is cylinder. Merkezleme çıkıntısı
is centering protrusion)The pressure vessel (vessel) cover is 12
metric pieces, the
Engineering Assignment Writing Service(Kapak is cover.
Silindir is cylinder. Merkezleme çıkıntısı is centering
protrusion)The pressure vessel (vessel) cover is 12 metric pieces,
the quality and size of which are specified below.It is mounted
with bolts.Internal pressure in the boiler Pi,Boiler inner diameter
D,Outside diameter of cover flanges Df, mm,The total length of the
bolt is Lctop,The insertion diameter of the bolts is D1 = Dyer =
(Df D) / 2.Screwed (threaded) body length of the bolt is Lcv = 2d
6.Screwless body length is Lcg = Lctop-Lcv.Thickness of the gasket
is L-gasket = 5 mm.As the length of the part of the bolt subject to
change of shape (tightened length)It will be taken as the total
length of the parts and the gasket. E seal = 70 N / mm2,E steel =
206 850 N / mm2The friction coefficient on all surfaces shall be
taken as u = 0.14.Boiler internal pressure Pi = 33.5 [N /
mm2]Boiler inner diameter D = 114.1 [mm],Cover Flange outer
diameter Df = 280 [mm],Top part (No.1) length (thickness) Lp1 =
109.5 [mm],Lower part (No.2) length (thickness) Lp2 = 114.5
[mm],The total length of the bolt Lctop = 165.8 [mm]9.8M14x2,
average d2 = 12.701 mm, tooth base dd = 11.546 mmIt will be assumed
that only the shape of the gasket has changed. (Its parts will be
assumed to have no change in shape).a) Calculate the forces on
bolts and tightened parts during operation.b) Calculate the total
tightening torque and safety coefficients.c) Bolt and gasket
deformation amounts during tightening and working in (um)and draw
the prestressing triangle with a scale.d) Draw the manufacturing
picture (by dimensioning) of the bolt, gasket and flange cover in
1: 1 scale (very large ones 1: 2).(Kapak is cover. Silindir is
cylinder. Merkezleme çıkıntısı is centering protrusion)
The V-belt pulley is connected to the shaft with a half-moon
(WOODRUFF) wedge. Wedge; b = 10mm, It has dimensions
The V-belt pulley is connected to the shaft with a half-moon
(WOODRUFF) wedge. Wedge; b = 10mm, It has dimensions h = 11 mm, t1
= 7.8 mm, t2 = 3.4 mm.a) Calculate and choose the L dimension of
the wedge.b) Keyways on the shaft and hub are the same heights (t1
= 7.8mm, t2 = 3.4mm)circular channel suitable for cylindrical
(round) wedge is openedthen with round wedge (Material properties
of this wedge Half moon wedge materialspecifications shall be taken
as equivalent to the specifications) L length of the safe round
wedgecalculatec) Draw the montage drawing in 1: 1 scale.Shaft
diameter (d): d = 109.4 [mm]Power (N): N = 16.4 [kW],Speed (n): n =
710 [d / d]Safety Coefficient,: S = 2.62Yield stress of the wedge
material, 295 N/mm2 (E295)
The following values were determined in a series of rod
readings made under identical conditions: 3.312, 3.307, 3.304,
3.306, 3.309,
The following values were determined in a series of rod
readings made under identical conditions: 3.312, 3.307, 3.304,
3.306, 3.309, 3.301, 3.311, 3.308, 3.312, 3.306, and 3.313 meters.
Determine the following: most probable value of the observed rod
readings, probable error of a single measurement and of the mean,
and the relative precision of a single measurement and of the mean
Based on the stiffness of a spring in the arrangements of
four identical helical springs in series, parallel and mixed
Based on the stiffness of a spring in the arrangements of
four identical helical springs in series, parallel and mixed (the
parallel group consisting of 3 springs will be connected in series
with the other fourth spring),a) Calculate the stiffness
(characteristics) of the series, parallel and mixed system.b) Show
the stiffnesses (k) in each case together with the value in ONE
graph.Spring material shear modulus G = 80800 N / mm2Load F = 720
[N]Average Spring diameter D = 263 [mm]Spring wire diameter d = 17
[mm]WINDING Count, Z: 12 turns
A surveying instructor sent all the 40 students in his class
out to measure a distance between two points marked
A surveying instructor sent all the 40 students in his class
out to measure a distance between two points marked on a runway.
The students working in groups of four came up with 10 different
measurements as follows: 920.45, 921.05, 921.65, 920.25, 920.15,
921.85, 921.95, 920.45, 921.15, and 921.35 meters. Assuming these
values are equally reliable and that variations result only from
accidental errors, determine the relative precision of single
measurement and the relative precision of the mean.
Starting from the left side in the figure above, an
experimental Assembly is given in the form of a Test
Starting from the left side in the figure above, an
experimental Assembly is given in the form of a Test Transformer,
voltage divider and Test sample. Accordingly, answer the following
questions.a) – draw a sketch showing a circuit diagram showing how
three-phase winding connections of such a transformer and voltage
divider and experimental sample experimental Assembly are made.b) –
determine what the maximum capacitance value of a test sample that
can be tested at 1500kv should be c) determine what the maximum
capacitance value of a test sample that can be tested at 600kv
should be.
2-) The BC part of the i profile bar, which is tilted on the
inclined plane given in Figure 2,
2-) The BC part of the i profile bar, which is tilted on the
inclined plane given in Figure 2, is free. The AB part of the rod
in contact with the friction surface is 5 m long and the BC part 3
m long. 8 = 10 °, the friction coefficient between the bar and the
surface is u = 0.8. Since the profile bar has a weight of 270 kg,
find the smallest weight W that will unbalance it and specify the
way the balance is disturbed. Rollers are frictionless.
Consider the “baseline” ideal Diesel cycle shown on the P-V
and T-s diagrams. Sketch modified P-V and Ts diagrams for
Consider the “baseline” ideal Diesel cycle shown on the P-V
and T-s diagrams. Sketch modified P-V and Ts diagrams for the
scenarios given. Unless otherwise noted, assume the initial
temperature andpressure, compression ratio, fuel mass fraction,
heating value, etc. are unchanged. Where useful forclarity, label
plots with phrases like “this area = that area,” “these two
temperatures are the same,” etc.In some cases there may be no
change. Unintelligible scribbles don’t get much credit!
Also,explanation of the modified cycle that shown in the P-V and
T-s diagrams.a) The amount of fuel injected is increased by 25% but
to avoid overheating, the compression ratio ischanged so that the
modified cycle has the same maximum temperature as the baseline
cycle. Thecombustion still occurs at constant pressure in the
modified cycle.b) There is heat loss during the compression stroke
but not during any other part of the cycle.c) Due to a fuel
injector malfunction, the first half the fuel is injected at
minimum cylinder volume andburns instantaneously at constant
volume; the other half burns normally at constant pressure.
Thetotal amount of fuel burned is the same as in the baseline
cycle.d) A new lubricant is used that decreases rubbing
friction
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