During this period, how did most people gain scientific knowledge?
a. through practical experience
b. through education
c. through correspondence
d. through observation
a. through practical experience
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Answer the following statement(s) true (T) or false (F)
1. Control magnetic relays are used to control small loads. 2. Most of the relays used in machine tool control have double-break contacts. 3. Relays are used more often to open and close control circuits than to operate power circuits. 4. The greatest advantage of relays with mechanical contacts is that they are resistant to shock and vibration. 5. Magnetic relays are affected by the electric noise and the voltage spikes induced in the system.
Two ways to reduce illness and injury on a job site are to be fully aware of the causes and costs of incidents and to _____.
a. conduct annual safety tailgates b. require all first-line supervisors to be certified in first aid c. ban prescription drugs in the workplace d. have a company-wide standardized safety program
Operational plans, because they are derived from strategic plans, are aimed at achieving
operational goals.
Indicate whether the statement is true or false.When connecting a four-way switch, the first step is to ____.
a. connect the travelers b. connect the neutral conductor to the light c. connect the ungrounded, or hot, conductor to the common terminal of one three-way switch d. connect the other side of the light to the common terminal of the second three-way switch