Precision Machining Technology (MindTap Course List)
2nd Edition
ISBN: 9781285444543
Author: Peter J. Hoffman, Eric S. Hopewell, Brian Janes
Publisher: Cengage Learning
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Textbook Question
Chapter 7.2, Problem 6RQ
The grade of a wheel describes its __________ on a scale from __________ to __________.
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QUESTION 2
Note: Work accurately to two decimal places. Use a point (.) as your decimal place holder.
A horizontal single cylinder engine has a cylinder diameter of 75 mm, a radius of crankshaft 70 mm and a connecting rod length of 393 mm. The mass of the piston is 7 kg and that of the connecting rod is 7 kg. The centre of mass of the connecting rod is 199 mm from the big end bearing centre and has a radius of gyration k = 254 mm through the centre of gravity of the connecting rod. The effect of the connecting rod mass may be allowed for by apportioning it between the two ends. When the crank is 54° from the top dead centre position on the compression stroke (piston moving towards (TDC) the gas pressure is 849 kPa. The crankshaft rotates at a rotational speed of 924 rpm.
2.1 Calculate the reciprocating mass (R) of the system [answer in kg].
2.2 Calculate the kinetic energy of rotation of the connecting rod (E), through its centre of gravity [answer in Joule].
2.3 Calculate the…
ASAP
The u component of F1 is_________while the u component of F2 is__________. Assuming the vertical direction is positive upward and negative downward. the vertical component of F1 is_______and based on the __________degree angle measure. The vertical component of F2 is_____and based on the__________________degree angle measure.
The resultant's vertical component will be____________while the u component will depend on the magnitude of F1 and F2's u component. Choice "a" is WRONG when i did it
a. positive,negative,30,postive,45,negative (X)
b. positive,negative,negative,30,negative,45,positive
c. positive,negative,negative,30,negative,65,negative
d. negative,positive,negative,30,negative,45,negative
Chapter 7 Solutions
Precision Machining Technology (MindTap Course List)
Ch. 7.1 - What are three benefits of precision grinding?Ch. 7.1 - What is the major use of the surface grinder?Ch. 7.1 - What are the two spindle types used for surface...Ch. 7.1 - What are the two types of table movements used for...Ch. 7.1 - Label the parts of the surface grinder.Ch. 7.1 - What are three types of cylindrical grinders?Ch. 7.1 - Tool and cutter grinders can be used to _______...Ch. 7.2 - What wheel shapes are commonly used for surface...Ch. 7.2 - What abrasive is commonly used to grind steels?Ch. 7.2 - What abrasive is used to grind nonferrous metals,...
Ch. 7.2 - What does CBN stand for?Ch. 7.2 - What superabrasive is a good choice for grinding...Ch. 7.2 - The grade of a wheel describes its __________ on a...Ch. 7.2 - Prob. 7RQCh. 7.2 - Prob. 8RQCh. 7.2 - Generally, harder wheels should be used to grind...Ch. 7.2 - Wheel A: 32A60H8V Wheel B: 39C100L6V What is the...Ch. 7.2 - Wheel A: 32A60H8V Wheel B: 39C100L6V Which wheel...Ch. 7.2 - Wheel A: 32A60H8V Wheel B: 39C100L6V Which wheel...Ch. 7.2 - Wheel A: 32A60H8V Wheel B: 39C100L6V Which wheel...Ch. 7.2 - Wheel A: 32A60H8V Wheel B: 39C100L6V What type of...Ch. 7.3 - List five surface grinder safety guidelines.Ch. 7.3 - What should be done to every grinding wheel before...Ch. 7.3 - When using a magnetic workholding device, the work...Ch. 7.3 - When using a magnetic chuck to hold a workpiece...Ch. 7.3 - Describe the difference between wheel truing and...Ch. 7.3 - What tool is used to true and dress an aluminum...Ch. 7.3 - How is a CBN wheel trued and dressed?Ch. 7.3 - Depth-of-cut range for surface grinding is: a....Ch. 7.3 - What should be done to a magnetic chuck when it...Ch. 7.3 - What workholding device can extend the magnetic...Ch. 7.3 - What workholding device can be used when grinding...Ch. 7.3 - Briefly describe the method for grinding two...Ch. 7.3 - List three types of workpiece features that can be...Ch. 7.3 - List three possible solutions to eliminate bum...Ch. 7.3 - What can cause scratches on the surface of a...
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