Many common electronic devices never fully turn off. If not disconnected from the power supply, they continue to draw electricity even when switched off. This hidden use of energy is called ______ .
A. operational energy
B. minimal loads
C. embodied energy
D. phantom loads
Answer: D
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A steam turbine operates at 1800 revolutions per minute (rpm). The turbine delivers 65.0 MW of power to the shaft of an electrical generator. Determine the torque on the steam turbine’s shaft.
Given: W?rs = 65.0 MW = 65,000,000 W;N? = 1800 rpm = 30 rps What will be an ideal response?
The working load limit of a chain is usually equivalent to what percentage of the tensile strength rating of the steel it is made of?
A. 25 percent B. 50 percent C. 75 percent D. 100 percent
The discovery of gene sequences that control the ripening process is coming to fruition in the ____
industry.
a. apple c. tomato b. grapefruit d. pear
Some cleaning and lubricating compounds can cause severe deterioration of many plastic materials used for insulating and structural applications in equipment.
What will be an ideal response?