A 24-tooth spur gear is to drive a 12-tooth spur gear. For both gears, the diametral pitch is 24 tooth/in. The gears are cut on the 20° full-depth involute system. Find and tabulate the addendum, dedendum, clearance, circular pitch, base pitch, tooth thickness at the pitch circle, pitch diameters, base circle radii, and contact ratio.

Given that the pressure coefficient Cp distribution over a 2-dimensional slender
body of chord c is described by Cp = -3(1-x/c) on the upper surface of the body and
Cp = (1-x/c) on the lower surface of the body, then plot the pressure distribution and
calculate: (a) The lift coefficient acting on the body, (b) The pitching moment coefficient on
the body about its leading edge.

An experiment on tethered mine motions is to be conducted in fresh water in a wave tank. The mine is a sphere of 5cm diameter made of polystyrene (weight assumed negligible). The anchoring block is a lead cube of side length 5cm. The specific gravity of lead is 14.0. If the mine is joined to the lead cube by a light chord such that it floats completely submerged just below the free surface, determine:

a) the tension in the chord

b) the reaction force between the lead cube and the bottom of the tank.

A rivet is to be inserted into a hole. A random sample of n equals 15 parts is selected and the hole diameter is measured. The sample standard deviation is millimeters. Is there strong evidence to indicate that the standard deviation of hole diameter exceeds 0.01 millimeters? Use (a) Calculate the test statistic Round your answer to two decimal places (e.g. 98.76). (b) Is there strong evidence to indicate that the standard deviation of hole diameter exceeds 0.01 millimeters?

List two different types of AC split-phase motors and briefly explain the basic theory of operation of these motors in terms of how they will start the motor.

Question 12 Needs Grading With the ans wer page provided 1) Define the neutral axis of a bearo under going bending stress 2) Draw a fiber-s tresses diagram for the I-bean Question

What type of stresses occur around the notch of a ductle metal ith an extremely small radius, and what remedies would you prescrbe to that area to prevent t from faling?

Question 14 You're an prcject engineer for a major oil company and your Quality Control Techrician comes up to you with a Nonc onformty Report As he was conduc ting a nondes truc trve test on a uned dillng pipe he discovered some erosion, 8 down the inner diameter of a 6" ppe He needs you to certify this pipe so it can be used again for a rush job The ppe is scheduled to ship out tomonow moming if you reject the ppe youl have to shp a new bar s tock to the machine shop and have it turned, which wll take another 2 weeks If ths happens, you might lose the job If you certi?y d, the pipe may or may not washout What information and tools would you need in orde to make a fast decision? Explain your decision for each type of information and tool you might need

II. Preventive Maintenance

1. What is preventive maintenance?=

2. Give at least 5 defects on each category.

Metal Parts                           Rubber, Fiber, Plastic, Glass fiber

1.                               1.

2.                               2.

3.                               3.

4.                               4.

5.                               5.

Control sys. Components                   Electrical components and actuators

1.                               1.  

2.                               2.

3.                               3.

4.                               4.

5.                               5.

Liquid system

1.

2.

3.

4.

5.

Thermodynamics

If you use a number from a table can you please show me a picture from what table you use because that's what I'm mainly confused about

1. (ans:159.50)

Saturated water vapor at 14.85 bar enters an insulated throttling valve which drops the pressure to 1.50 bar. Determine the temperature (^oC) of the steam at the exit of the valve.

Note: Give your answer to two decimal places.

Shallow drawing is defined as a cup drawing where the cup height is less than or equal to ________________ the diameter of the cup.

1 points   

QUESTION 17

Clamping can be kept on the outside diameter in the case of a boring fixture even when the wall thickness is small.

True

False

1 points   

QUESTION 18

A fixture should be designed such that the cutting tool forces act against the clamping arrangement.   

True

False

QUESTION 13

Bend allowance is provided in a bending operation to account for increased length due to applied stresses.

True

False

1 points   

QUESTION 14

A cylindrical object when located by a V-block arrests 4 degrees of freedom.

True

False

1 points   

QUESTION 15

An indirect pilot is attached directly to ______________ in the case of a sheet metal shearing die.

Principle of momentum and linear momentum: A penguin inside a box (10 Newtons) ascends the inclined plane (π / 3 Radians) completely smooth due to an impulsive force that gives it an initial speed of 36 km / h. Calculate the seconds it would take to come to a complete stop (rest). It is not necessary to know the magnitude of Impulsive Force F as you can see in your equation of the principle of impulse and linear momentum (It stopped acting at the moment it reaches the indicated speed)

QUESTION 10

In metal cutting, the application of cutting fluid decreases the coefficient of friction thereby improving the machining efficiency.

True

False

1 points   

QUESTION 11

Increasing the rake angle of the cutting tool significantly reduces the power consumption in turning.

True

False

1 points   

QUESTION 12

A work holder must position or locate a workpiece in a definite relation to the cutting tool and must withstand ________________________ forces.

Plot the shear strain and the shear strain rate as functions of the shear angle, for several tool rake angles. Describe your observations.

Search for the thought experiment called “Maxwell’s demon” and summarize its importance regarding the second law of thermodynamics in your own words in a half a page long essay. Add the references at the end of the essay.