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.
1. FALSE
2. TRUE
3. TRUE
4. TRUE
5. FALSE
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Which of the following is true regarding tilt-up construction?
a. The panels are generally lightweight, making them easy to lift and place. b. The panels are normally constructed offsite and brought in on trucks. c. Once placed, the panels are typically self-supporting. d. Only a qualified engineer can make changes to the lifting plan.
Natural-draft furnaces generally have efficiency ratings of _____.
a. below 65 percent b. below 78 percent c. below 85 percent d. 90 percent and above
Which communist state experienced a violent transition to non-communist rule?
a. Bulgaria b. Romania c. Albania d. Czechoslovakia
OSHA standards require that when using a four-leg hitch you must size each leg as if it were a three-leg hitch
A. True B. False