Your duty is to construct the above circuit and change Potentiometer resistance until you see 1v 2v……12v at the output voltage w
hich is showing above and at each output voltage measure the resistance and current. Fill the table above and write at least 10-page report. Your input voltage is 12 volts which is constant. Do not change input voltage.
1 answer:
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Answer:
b). Occurs at the outer surface of the shaft
Explanation:
We know from shear stress and torque relationship, we know that
where, T = torque
J = polar moment of inertia of shaft
τ = torsional shear stress
r = raduis of the shaft
Therefore from the above relation we see that
Thus torsional shear stress, τ is directly proportional to the radius,r of the shaft.
When r= 0, then τ = 0
and when r = R , τ is maximum
Thus, torsional shear stress is maximum at the outer surface of the shaft.
Answer:
7.07%
Explanation:
Thermal efficiency can be by definition seen as the ratio of the heat utilized by a heat engine to the total heat units in the fuel consumed.
We will determine the thermal efficiency of the given problem at the attached file.
Answer:
(b) Given the Weibull parameters of example 11-3, the factor by which the catalog rating must be increased if the reliability is to be increased from 0.9 to 0.99.
Equation 11-1: F*L^(1/3) = Constant
Weibull parameters of example 11-3: xo = 0.02 (theta-xo) = 4.439 b = 1.483
Explanation:
(a)The Catalog rating(C)
Bearing life:
Catalog rating:
From given equation bearing life equation,
we Dividing eqn (2) with (1)
The Catalog rating increased by factor of 1.26
(b) Reliability Increase from 0.9 to 0.99
Now calculating life adjustment factor for both value of reliability from Weibull parametres
Similarly
Now calculating bearing life for each value
Now using given ball bearing life equation and dividing each other similar to previous problem
Catalog rating increased by factor of 0.61