An ideal four stroke Otto cycle engine has 6 cylinders and a displacement of 4 Liters. It has a compression ratio of 8.5:1. If the mean effective pressure is 4000 kPa when operating at 3000 rpm, what will be the indicated power and what is the required heat transfer to the engine from a combusting fuel?

A ½” diameter UNC, SAE Grade 8, bolt with rolled threads is preloaded to 70% of its proof strength when clamping a 2.75” thick sandwich of solid steel. Find the safety factors against static yielding, fatigue failure and joint separation when am external fatigue load having Fmax=1000 lbf and R=0 load is applied.

A .05 wide journal bearing supporting the loads on a 1 inch shaft just meets the Trumpler’s design criteria for a FACTOR OF SAFTY OF 2.05. The bearing satisfies all the other Trumpler’s design criteria by much larger margin. Your colleague suggests that increasing the bushing width to 0.75 inches would be an adequate design and you would not need to conduct another journal bearing analysis because the greater width would result in a bearing which satisfy all of Trumpler’s design criteria.

Do you agree with your colleague that you can state that the 0.75 inch wide journal bearing would exceed Trumplers Design criteria and that no additional analysis is required? Justify your answer.

3. Assume an annulus of inner radius r1 and outer radius r2. The inner surface is at T1, the outer surface at T2, T1 > T2. Assume heat transfer between the surfaces by conduction, with a variable conductivity, k = a + bT, develop an expression for the temperature in the material of the annulus.

an undulated surface that is designed to reduce friction by eliminating wear particles from the sliding interface. The interface is subjected to normal force N. The sliding speed is so low that the interfacial temperature rise is negligible relative to the melting point of the material. We are planning to use metals for the sliders.

a. Determine the optimum dimensions of the undulated topography.

b. Discuss the consequence of deviating from the optimum geometry.

A piston cylinder device containing 0.5 kg of water has initial volume of 0.5L. The device starts and goes through a Carnot cycle and generates 500.3 kJ work. If the maximum temperature that water will reach is 1.5 times the minimum temperature of water and during heat rejection process, water goes from saturated vapor to saturated liquid phase. Find:

1. QH & QL for this cycle .

2. TH & TL for this cycle.

3. Maximum and minimum pressures that the cycle will reach.

4. Show this process on a T-v diagram and label temperature, pressures and specific volumes.

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