Most electrically driven constant-speed machines operate at speeds below ____ rpm.
A. 1800
B. 2000
C. 2200
D. 2400
Answer: A
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?When the number of neutrons in the nucleus of an atom changes, the mass of the element is different, forming a(n) ____ of the original element.
A. ?isotope B. ?isomere C. ?neutral form D. ?new form
Match the following beef-processing terms with the correct descriptions
a. offal c. block beef b. viscera d. shrouding 11. organs located in the cavity of the animal 12. nonmeat material converted to by-products 13. wrapping tightly with a cloth 14. quarters, halves, and wholesale cuts for shipping
An AISI 316 stainless steel spherical container is used for storing chemicals undergoing exothermic reaction that provides a uniform heat flux of 60?kW/m2 to the container’s inner surface. The container has an inner diameter of 1 m and a wall thickness of 5 cm. To prevent thermal burns on individuals working around the container, it is necessary to keep the container’s outer surface temperature below 50°C. If the ambient temperature is 23°C, determine the necessary convection heat transfer coefficient to keep the container’s outer surface temperature below 50°C. Is the necessary convection heat transfer coefficient feasible with free convection of air? If not, discuss other options to prevent the container’s outer surface temperature from causing thermal burns.
Torque is expressed in units of _________
A) Pounds per minute B) Pound-feet C) Pound-feet per second D) Foot-pounds per minute