The hatchet fish can use its pectoral fins to fly short distances across the water's surface
Indicate whether the statement is true or false
True
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The temperature at which an engine oil begins to gel is known as:
A. flash point B. fire point C. pour point D. freeze point
Most of the animals produced in the United States are raised for ______
a. work c. recreation b. food d. leather
The depth of shoulders and steps machined in a workpiece held in a chuck are measured with:
A) Inside micrometer and spring joint caliper B) A hook rule or a depth micrometer C) An optical comparator D) Tape measure and spring caliper
Answer the following statement(s) true (T) or false (F)
1. Alternating current travels in three directions in a circuit. 2. The purpose of overcurrent protection is to open a circuit if the temperature in the wiring or equipment rises to an excessive or dangerous level. 3. A fuel cell is like a battery except, rather than requiring periodic recharging, it runs continuously as long as it gets a constant supply of hydrogen gas and oxygen. 4. Electric welders are of the arc type and the resistance type. 5. The raceway in cellular concrete floor slabs is metal.