Hi, please help me with this question.

What does flank wear depend on and why did a tool that machined steel 1020 suffered a flank wear greater than one of the same material that machined 4140 steel or aluminum?

What does crater wear depend on?

If you can give also some resources from which I can find information about the answer.

Thank you very much.

An old wooden telephone pole with a single cross member was blown off center during a recent storm. To temporarily stabilize the telephone pole, a repair crew has attached a cable from the end of the cross member to an eye-ring stake anchored in the ground. (Figure 3) If the origin O of a coordinate system is placed where the pole meets the ground, the point where the cross member is attached to the pole is A(−2.00,1.80,23.4)ft and the point where the cable is attached to the end of the cross member is B(−2.00,−3.20,26.4)ft. The cable's direction is {1.00i−1.00j−1.00k} and it has a tension of 195 lb . What is Ma, the moment that tends to twist the telephone pole due to the tension in the cable applied at point B?

What are the weakneses of the following forces in modeling the piston:

1-Constant force

2- linear

3-1/2 sin wave

Refrigerant-134a enters an adiabatic compressor as saturated vapor at 160 kPa at a rate of 2.8 m³/min and is compressed to a pressure of 900 kPa. Determine the minimum power that must be supplied to the compressor. Use the tables for R-134a.

The minimum power that must be supplied to the compressor

CHOCHITO, S.A homemade sweets factory wants to determine the normal time and standard time for packaging and packaging of its variety of products. The following table contains the data about a recent study, regarding the measurement of the elements to be carried out. A measurement is considered incorrect if it has a variability greater than +/- 10%, therefore it must be eliminated from the calculation. Knowing that the company grants its workers 30 minutes for the necessary delay and fatigue:

Work elements    Cycles in minutes R

Calculate:

a. Normal time and standard time

b. Calculate the number of boxes per worker

How Engineering Economy helps engineers for optimized decision?

Can there be multiple optimal solutions to an assignment problem? How to identify such situations

What do you understand by break down maintenance? Discuss the various features of breakdown maintenance management?

Do maintenance management principles have any relevance in the service industry?

Explain the following briefly :

Redundancy

Availability

Maintainability

Air enters the compressor of a regenerative air-standard Brayton cycle with a volumetric flow rate of 60 m³/s at 0.8 bar, 280 K. The compressor pressure ratio is 20, and the maximum cycle temperature is 1950 K. For the compressor, the isentropic efficiency is 92% and for the turbine the isentropic efficiency is 95%.


For a regenerator effectiveness of 86%, determine:
(a) the net power developed, in MW.

(b) the rate of heat addition in the combustor, in MW.

(c) the percent thermal efficiency of the cycle.

Problem 8.045 SI

Consider a regenerative vapor power cycle with two feedwater heaters, a closed one and an open one, and reheat. Steam enters the first turbine stage at 12 MPa, 560°C, and expands to 2 MPa. Some steam is extracted at 2 MPa and fed to the closed feedwater heater. The remainder is reheated at 2 MPa to 520°C and then expands through the second-stage turbine to 0.3 MPa, where an additional amount is extracted and fed into the open feedwater heater operating at 0.3 MPa.

The steam expanding through the third-stage turbine exits at the condenser pressure of 60 kPa. Feedwater leaves the closed heater at 210°C, 12 MPa, and condensate exiting as saturated liquid at 2 MPa is trapped into the open feedwater heater. Saturated liquid at 0.3 MPa leaves the open feedwater heater. Assume all pumps and turbine stages operate isentropically.


Determine for the cycle:

(a) the heat transfer to the working fluid passing through the steam generator, in kJ per kg of steam entering the firststage turbine.

(b) the percent thermal efficiency.

(c) the heat transfer from the working fluid passing through the condenser to the cooling water, in kJ per kg of steam entering the first-stage turbine.

The 4 lb particle is subjected to the action of its weight and forces F1={2i+6j−2tk}lb, F2={t2i−4tj−1k}lb, and F3={−2ti}lb, where t is in seconds. Determine the distance the ball is from the origin 5 s after being released from rest.
(Figure 1).