field engineering is a stressful job, why would you choose it be a field engineering?
how do I answer this interview question?
In other words, how do I show that I am able to afford stress
please give an example
In: Mechanical Engineering
A rigid tank of volume 0.75 m3 is initially evacuated. A hole develops in the wall, and air from the surroundings at 1 bar, 30°C flows in until the pressure in the tank reaches 1 bar. Heat transfer between the contents of the tank and the surroundings is negligible. Determine the final temperature in the tank, in °C.
In: Mechanical Engineering
Explain and describe the design, the need for, and use of burnable absorbers. Focus on IFBA types of burnable absorbers.
In: Mechanical Engineering
use a matlab built-in function to numerically solve:
dy/dx= -x^2+((x^3*e^-y)/4) for 1<=x<=5 with y(1)=1
plot the solution
In: Mechanical Engineering
2) Explain the meaning of 4 different alloy codes by giving the composition and temper condition. State the applications in which these alloys can be used and explain the reasons why these alloys should be used in these specific applications.
In: Mechanical Engineering
A 2-m-high, 4-m-wide rectangular advertisement panel is attached to a 4-m-wide, 0.15 m-high rectangular concrete block (density = 2300 kg/m3) by two 5-cm-diameter, 4-m-high (exposed part) poles, as shown in the figure. If the sign is to withstand 150 km/h winds from any direction, determine (a) the maximum drag force on the panel, (b) the drag force acting on the poles, and (c) the minimum length L of the concrete block for the panel to resist the winds. Take the density of the air to be 1.3 kg/m3.
In: Mechanical Engineering
Determine the minimum required coolant mass flow rate to avoid boiling using 50/50 Glycol properties
Understand the function of pressure cap. What does a pressure cap do in an automotive cooling system?
What is the construction of a pressure cap?
How does it perform its function? What are the possible failure modes? How likely are these failure modes? Are you familiar with FMEA's?
Choose a heat exchanger configuration - Parallel vs Counter flow
Think about fluid allocation. Which side the coolant should go and why?
In: Mechanical Engineering
Air at 30 C flows at 10 m/s across an in-line tube bank consist of 5 rows with 10 tubes per row. The diameter of the tube is 5 cm and the tube pitch is 13 cm. Water flowing in tube maintains the tube surface temperature at 80C find the following:
a) the air temperature at the outlet of the tube
b) the convective heat transfere per unit length per tube to the air
( it is heat transfer problem )
In: Mechanical Engineering
Consider a vertical slider on a rod where the potential energy of the slider at height, h, is used. Derive the impact factor. Assume the slider has a mass, m, the system has a dissipation factor, ?, and the static and impact deflections are given as, ?i and ?st .
In: Mechanical Engineering
A steam power plant operates with a boiler that is heated from a heat source at 457 °C and produces 450 ton/hr. of steam. The steam leaves the boiler at 425 °C and 4 MPa. The steam reaches a turbine at 375 °C and 3 MPa and leaves it at 50 kPa with 4% liquid water. This mixture is flown into a condenser that rejects the heat into a river at 17 °C. Water leaves the condenser at 50 kPa and 50 °C and pumped by a pump operating at 10 kJ/kg. The water leaves the pump at 4 MPa.
1. Draw the complete cycle with all numeric values of the problem depicted on the drawing. [10 points]
2. Calculate the Carnot efficiency of the cycle. [10 points]
3. Calculate the specific heat loss (kJ/kg) in the pipeline between the boiler and the turbine. Define input/output. [10 points]
4. Calculate the turbine work in MW. Define input/output. [10 points]
5. Calculate the specific heat transfer (kJ/kg) in the condenser. Define input/output. [10 points]
6. Determine the specific heat transfer (kJ/kg) in the boiler. Define input/output. [10 points]
7. Determine thermal efficiency of the cycle. [10 points]
8. Determine the isentropic efficiency of the turbine. [10 points]
9. Calculate the specific entropy (kJ/kg-K) of the cycle and explain whether this is a feasible process. [10 points]
10. Calculate the total specific entropy change (kJ/kg-K) of the system and explain whether this is a feasible process. [10 points]
In: Mechanical Engineering
How can I create a graph of these differential equations in Mathcad?
In: Mechanical Engineering
Steam undergoes an isentropic compression in an insulated
piston–cylinder assembly from an initial state where
T1 = 120°C, p1 = 1 bar to a
final state where the pressure p2 = 30
bar.
Determine the final temperature, in °C, and the work, in kJ per kg
of steam.
In: Mechanical Engineering
A set of ceramic parts are tested and the stress required for failure is measured; the results are as follows: 152 MPa, 260 MPa, 500 MPa, 1150 MPa, 700 MPa, 640 MPa, 370 MPa, 1020 MPa, and 1590 MPa. Calculate the Weibull modulus for the material. Discuss whether the material would be a good choice if we wished to design a reasonably reliable part.
In: Mechanical Engineering
According to Breguet range equations, what are techniques to increase range and endurance?
In: Mechanical Engineering
Steam at 4800 lbf/ in.2, 1000°F enters the first
stage of a supercritical reheat cycle including two turbine stages.
The steam exiting the first-stage turbine at 600 lbf
/in.2 is reheated at constant pressure to 1000°F. Each
turbine stage and the pump has an isentropic efficiency of 91%. The
condenser pressure is 1 lbf/ in.2 If the net power
output of the cycle is 100 MW, determine
(a) the rate of heat transfer to the working fluid
passing through the steam generator, in MW.
(b) the rate of heat transfer from the working
fluid passing through the condenser, in MW.
(c) the cycle thermal efficiency.
In: Mechanical Engineering