1.What is the purpose of the diffuser section of a gas turbine engine, and under what principle does it operate?

2.Why do some axial flow gas turbine engines use multiple compressors?

3.What happens in a compressor stall?

4.Why is a variable exhaust nozzle required in an engine equipped with an afterburner?

Q) Explain in brief, the importance of Energy Auditing and Energy Management. With the use of a case study, explain its significance at your workplace?

Air undergoes a polytropic process in a piston–cylinder assembly from p1 = 1 bar, T1 = 295 K to p2 = 7 bar. The air is modeled as an ideal gas and kinetic and potential energy effects are negligible. For a polytropic exponent of 1.4, determine the work and heat transfer, each in kJ per kg of air, (1) assuming constant cv evaluated at 300 K. (2) assuming variable specific heats.

A Copper plate that is 588mm wide and 48 mm thick is to be reduced in a single pass in a two high rolling mill by using a 321mm diameter roll. The coefficient of friction at roll workpiece interface is  0.14 and the roll rotates at 107rpm. The rolling process is performed above the recrystallization temperature of the material and the width of the plate does not change during this operation. What is the minimum final thickness (mm) possible

2. Define a process for finding a job. For what types of endeavor does a well-defined
process enhance performance?

Diagram a process for planning and cooking a family dinner. Does your process re-
semble the generic product development process? Is cooking dinner analogous to amarket-pull, technology-push, platform, process-intensive, customization, high-risk quick-build, or complex system process?

Describe the difference between a substitutional solute atom, an interstitial solute atom, and a vacancy. Discuss whether the stress in the material near the defect will be tensile or compressive

Re-derive the coefficient of pitching moment equation for the aircraft in the previous problem.Note: Use the corresponding free body diagram and build-up method for the derivation.

Your task is to take the above code, and insert comments (using the “%” symbol) next to each line of code to make sure that you know what every line does.


close all;
clear all;
clc;

thetaAB = 0;
angleIncrement = 0.1;
numOfLoops = 360/angleIncrement;
thetaABVector = [angleIncrement:angleIncrement:360];
rAB = 5;
rBC = 8;

for i=1:numOfLoops
    bothResults = SliderCrankPosn(rAB,rBC,thetaAB);
    rAC(i) = bothResults(1);
    thetaBC(i) = bothResults(2);
    thetaAB = thetaAB+angleIncrement;

end

subplot(2,1,1)
plot(thetaABVector,thetaBC,'Linewidth',3);
xlabel('\theta_{AB} [degrees]');
ylabel('\theta_{BC} [degrees]');
xlim([0 360]);
ylim([300 400]);
grid on;

subplot(2,1,2)
plot(thetaABVector,rAC,'r');
xlabel('\theta_{AB} [degrees]');
ylabel('r_{AC} [inches]');
xlim([0 360]);
grid on;

Differences in means

1. Does quench water temperature affect average yield strength

2. Does O-ring hardness affect average leak pressure

3. Is the average pressure capacity of an air tank above spec

Differences in variances

1. Does quench water temperature affect variation in yield strength

2. Do harder O-rings reduce variability in leak pressure

3. Is the variation in pressure capacity of an air tank within spec

A particle moves along a straight line with an acceleration a=2v1/2m/s2, where v is in m/s.

If s = 0, v = 1 m/s when t = 0, determine the time for the particle to achieve a velocity of 18 m/s. Also, find the displacement of particle when t = 1 s. Express your answer using three significant figures and include the appropriate units.

This question is taken from "System engineering course " please answer it Only if you're sure from your answer. and please use proper English language.

Do politics play a role in all programs?

use python.

Consider 4 blocks with different masses mi connected by ropes of negligible mass. Three of the blocks lie on an inclined plane and the fourth lies in the direction of the gravity vector. The coefficients of friction between the blocks and the inclined plane are µi. The equations of motion governing these four blocks are described by the following system of equations:

T1 + m1a = m1g(sin(theta) - µ1*cos(theta))

-T1 + T2 +m2a = m2g(sin(theta) - µ2*cos(theta))

-T2 + T3 + m3a = m3g(sin(theta) - µ3*cos(theta))

-T3 + m4a = -m4g

Where the Ti denote the tensile forces in the ropes and a is the acceleration of the system. Determine a and the three Ti for θ = 45°, g = 9.82 m/s2 , {mi} = [10, 4, 5, 6]^T kg, and {µi} = [0.25, 0.3, 0.2]^T

The output to the command terminal prompt within Spyder should read:

T1 =

T2 =

T3 =

a =

All values should be printed out to 4 significant digits of accuracy and units must be assigned.

1. Air enters a steady-state diffuser at T1 = 20 °C, P1 = 100 kPa
and leaves at P2 = 105 kPa. You may assume an adiabatic
diffuser and constant specific heats. Find T2 if:
a) V1 = 10 m/s, V2 = 0 m/s
b) V1 = 100 m/s, V2 = 90 m/s
c) V1 = 500 m/s, V2 = 490 m/s
d) V1 = 1000 m/s, V2 = 990 m/s