Precision Machining Technology
Precision Machining Technology
3rd Edition
ISBN: 9781337795302
Author: Peter, Hoffman.
Publisher: Cengage Learning,
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Chapter 7.2, Problem 6RQ

The grade of a wheel describes its __________ on a scale from __________ to __________.

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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
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…
In the context of our teaching and learning, which one of the below statements is mostly correct about in the creation of detailed design of a component? In deciding the tolerance, the guidance is the tighter the better. I am the designer, so I decide the required tolerance as l like. The tolerance is determined by the function. The chance to manufacture component to the exact size is like to win a lottery. I would enjoy winning a lottery, so I should specify all the dimensions as exact, no tolerance to be considered at all.

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Precision Machining Technology

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