n a hartnell governor,the mass of each ball is 2.5 kg. Maximum and minimum centrifugal forces on the balls are 2000 N and 100 N corresponding to radius 20 cm and 15 cm respectively.Length of vertical and horizontal arms of the bell crank levers are the same, then the spring stiffness will be ________.
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A mass ‘m’ vibrates on a friction less platform as shown in figure. The combined spring constant will be:
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Equivalent stiffness (Keq1) for K1 and K1,
Keq(1) = K1 + K1 = 2K1
Equivalent stiffnesss (keq2) for K2 and K2,
Keq(2) = K2 + K2 = 2K2
Now, combined spring constant= 2K1+ 2K2
= 2(K1+ K2)
The working temperature in evaporator and condenser coils of a refrigerator are –23°C and 27°C respectively.The COP of a refrigerator is 0.8 of the maximum COP. If the power input is 1 kw, then, the refrigeration effect produced will be ________.
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A stream function is given by (x2 – y2). The potential function of the flow will be
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Which one of the following is clearance fif?
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Which one of the following methods can be used for forecasting when a demand pattern is consistently increasing or decreasing.
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Regression analysis is a statistical technique for specifying the relationships between variables.Regression analysis is widely utilized for forecasting and predictions.
Regression model is: y = f(x, B) ⇒ y =B0 + B1x, where B0 and B1
If critical path of a project is 20 months with a standard deviation 4 months, the probability that the project will be completed in 24 months is ________.
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Probability of project completion = 0.844 = 84.4%
In a tool life test, doubling the cutting speed reduces the tool life to 1⁄8th of the original. The Taylor’stool life index is:
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The modulus of elasticity for a material is 200 GN/m2 and Poisson’s ratio is 0.25. Then the modulus of rigidity will be________.
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The static deflection of a shaft under a flywheel is 4 mm. If g= 9.8 m/s2, then the initial speed in rad/s will be ________.
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