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Design Questions Set 9:

Quiz Mode

Find the width of the cap if the diameter of the crankpin is 66 mm

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How are the service brakes in cars typically operated?

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If (σb × Y)pinion > (σb × Y)gear, then the ________ is designed for bending.

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The load acting on a bearing in its plane of rotation is called the _____.

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The number of teeth on the wheel rotating at 400 R.P.M. is 80. Find the number of teeth on the mating pinion rotating at 1600 R.P.M.

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If T is the actual number of teeth on a helical gear and φ is the helix angle for the teeth, then the formative number of teeth is written as:

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A thin cylindrical pressure vessel of 500 mm diameter is subjected to an internal pressure of 2 N/mm2. If the thickness of the vessel is 20 mm, find the hoop stress.

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A rectangular section is subjected to a maximum stress of 400 N/mm2 and a minimum stress of 200 N/mm2. What is the ratio of the mean or average stress to the reversed stress component?

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A Butt Joint is loaded in tension with the following data:

Force applied on both sides of the Joint = 1000 N

Length of welded joint = 100 mm

Throat = 4 mm

Calculate the tensile stress induced.

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Solution:

Consider the following expressions:

A = Angle of contact of bearing with journal for partial journal bearing (in degrees)

B = Angle of contact of bearing with journal for full journal bearing (in degrees)

Which of the following is true for the relationship between A and B?

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