A fluid is flowing in the 4 in. diameter cylinder of a hydraulic system. When 4 points activated the piston moves 3 ft. in 15 seconds. (144 inches/minute). What
is the flow rate, in gallons per minute of the cylinder? *
A. 576 gal./min.
B. 2.5 gal./min
C. 7.8 gal./min
D. 1808 gal./min

Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?

Shafts are machine elements that are used to a) carry axial loads b) direct shear loads c) transmit power d) rotate at constant speed e) none of the above circular and square shafts subjected to the same torque under the same circum behave a) the same way b) almost the same way

Which of the following controllers anticipates the future from the slope of errors over time? a)-proportional b)-on/off c)-integral d)-derivative.