Q1): Consider the following third-order transfer function for open loop system:
?(?)?(?) =2
\
(? + ?. ??)(? + ?. ??)(? + ?. ??)
By using the polar plot method, choose the correct answer for the
following:
1) When the (ω) equal to one, the magnitude of function is:
A) 1.808 B) 1.705 C) 1.642 D) 1.505
2) When the (ω) equal to five, the magnitude of function is:
A) 0.368 B) 0.344 C) 0.323 D) 0.312
3) When the (ω) equal to ten, the magnitude of function is:
A) 0.093 B) 0.091 C) 0.087 D) 0.081
4) When the (ω) equal to three, the phase angle of function
is:
A) -120.1 B) -118.6 C) -116.5 D) -114.9
5) When the (ω) equal to seven, the phase angle of function
is:
A) -177.9 B) -173.5 C) -170.3 D) -168.9
6) The gain margin of the system is approximately equal to:
A) 7.7 B) 7.2 C) 6.7 D) 6.4
7) The phase margin of the system is approximately equal to:
A) +76o B) +80o C) +84o D) +88o
In: Mechanical Engineering
Q1: What is the difference between bar drawing and deep drawing? What is the difference between a cutoff operation and a parting operation? Distinguish between direct and indirect extrusion. Although the workpiece in a wire drawing operation is obviously subjected to tensile stresses, how do compressive stresses also play a role in the process?
Note: Please write in your own words don't copy and paste.
In: Mechanical Engineering
In: Mechanical Engineering
In: Mechanical Engineering
Explain briefly the term ‘Ergonomics’ and why it is important in the implementation of Occupational Safety and Health (OSH) at the typical workplace. Describe the THREE fundamental goals of Ergonomics.
In: Mechanical Engineering
In: Mechanical Engineering
What are the inversions of four bar mechanism &give their applications ?What are the inversions of four bar mechanism &give their applications ?
In: Mechanical Engineering
A stopwatch is to be used to estimate the time between the start and end of an event. Event duration might range from several seconds to 10 minutes. Estimate the probable uncertainty in a time estimate using a hand-operated stopwatch that claims an accuracy of 1 min/month (95%) and a resolution of 0.01 s.
Please show DETAILED work please.
How is Uc calculated?(Explain)
In: Mechanical Engineering
The thermal conductivity of an insulating material used over a
hot pipe varies as k = 0.0545 (1
+ 28.4 × 10–4 T) where T is in °C and k is in W/mK. This insulation
is used for a thickness of
12 cm over a pipe of diameter 0.6 m. The pipe surface is at 300°C
and the outside insulation
temperature is 60°C. Determine the heat flow for a length of 5 m.
Also find the mid layer
temperature.
In: Mechanical Engineering
An air-conditioning system operates at a total pressure of 1 atm and consists of a heating section and an evaporative cooler. Air enters the heating section at 15°C and 55 percent relative humidity at a rate of 30 m3/min, and it leaves the evaporative cooler at 25°C and 45 percent relatively humidity. Using appropriate software, study the effect of total pressure in the range 94 to 100 kPa and plot the results as functions of total pressure. (Please upload your response/solution using the controls provided below.)
In: Mechanical Engineering
What does ALARP stand for?
Select one:
a. As low as reasonably practicable
b. As long as risks are prepared
c. As low as reasonably possible
d. As long as risks are practical
What does mechanical integrity mean?
Select one:
a. Condition of a valve as an indicator of fitness for purpose
b. Condition of a compressor as an indicator of fitness for purpose
c. Condition of a pipeline as an indicator of fitness for purpose
d. Condition of a vessel as an indicator of fitness for purpose
What does package conformity of a product include?
Select one:
a. Cartons and shipping marks
b. Inner packing
c. Bar codes
d. All answers
What does the use of poor-quality measuring equipment result in?
Select one:
a. A hazard
b. Damage to plant equipment
c. Incorrect results
d. Injury to the inspector
What does tolerance in quality management mean?
Select one:
a. Totally out of work
b. Completely working correctly
c. Partially out of work
d. Partially working correctly
Clear my choice
What do pyrometers detect?
Select one:
a. Infrared radiation from the material being heated.
b. Light from the material being heated
c. The expansion pf liquid in a tube
d. Heat from the material being heated.
What do you use for removal of weak soil or rock?
Select one:
a. All answers
b. Bulldozer
c. Paver
d. Scaffolding
What is a bilateral tolerance?
Select one:
a. Sizes in both directions from the nominal size
b. Sizes in one direction from the nominal size
c. A geometric tolerance
d. No sizes
What is an international standard?
Select one:
a. An agreed way of carrying activities to a required level
b. A document that certifies the accuracy of plant equipment
c. A guide to the management of a production process
d. A written guarantee of machine reliability
What is an inward inspection?
Select one:
a. Checking for compliance and suitability
b. All answers
c. Checking goods and systems are consistent with the design specification
d. Checking goods and systems are fit for purpose
What is another name for breakdown maintenance?
Select one:
a. Just in time engineering
b. Preventative maintenance
c. Planned maintenance
d. Reactive maintenance
What is a reduced wall thickness?
Select one:
a. Potential indicator of internal corrosion
b. Potential indicator of internal crack
c. Potential indicator of inspection corrosion
d. Potential indicator of external corrosion
What is a remote indicator?
Select one:
a. Pressure, temperature or flow
b. A handheld data logger
c. A pressure gauge
d. A printed label or sign
What is a start-up cost?
Select one:
a. The amount needed to set up a program or operation.
b. The amount needed to buy a company
c. The amount needed to hire staff
d. The amount needed to pay off a bank loan
What is causing buckling?
Select one:
a. Compression
b. All answers
c. Tension
d. Rotation
What is positive material identification?
Select one:
a. It is a method used to identify what a metallic alloy is made of
b. It is a method used to identify cracks in pipework
c. It is a method used to charge a battery
d. It is a method used to identify the thickness of a pipe wall
PLEASE ONLY FINAL ANSWER NO NEED FOR DETAILS
In: Mechanical Engineering
A 50 inch long belt is used to transmit power from a motor to a working shaft. The two sheaves involved are both the same size, hence the belt is not being used to reduce or increase speed or torque, but simply to “couple” two shafts. The motor’s rated power is 50 hp and the required service factor is 1.25. The motor speed is 1160 rpm and the sheave diameters are 7.9”. How many 5V belts are required here? What is the number of belts required?
In: Mechanical Engineering
In: Mechanical Engineering
Write a program that calculates the average of a four lab marks. It should use the following functions:
• void getMarks() should ask the user for a lab marks, store it in a reference parameter variable, and validate it so that lab marks lower than 0 or higher than 100 is not accepted. This function should be called by main once for each of the four lab marks to be entered.
• void avgGradeDisp() should calculate and display the average of the four lab marks rounded to the nearest whole number. It should also display the grade of the average lab marks obtained by the student as per the table given below.
Lab Marks Grade GPA 75 - 100 A 3 65-74 B 2 50-64 C 1 0-49 F 0
In: Mechanical Engineering
Consider atmospheric air at a velocity of V = 20 m/s and a temperature of T= 20C, in cross flow over 10 mm square tube at 45 degrees, maintained at 50C.
In: Mechanical Engineering