Answer the following statement(s) true (T) or false (F)
1. A solenoid-controlled valve cannot be used to control air or hydraulic circuits.
2. A solenoid designed to operate on alternating current can also be operated on direct current.
3. Spring return valves are not very common in industry.
4. The OFF delay timer will begin timing when the relay coil is energized.
5. It is important to remember that the contacts on a latch coil will NOT return to their unoperated condition unless the unlatch coil is energized.
1. False
2. True
3. False
4. False
5. True
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The framing component used to prevent joists from crippling at the load transfer point is a _____.
a. flange b. header c. web stiffener d. clip angle
Express 4 ft. 6 in. to 18 in. in simplest form as a fraction and compare like units in terms of either the larger or smaller unit.
What will be an ideal response?
Answer the following statement(s) true (T) or false (F)
1. Engineers having knowledge of any alleged violation of this Code, following a period of thirty days during which the violation is not corrected, shall report thereon to appropriate professional bodies and, when relevant, also to public authorities, and cooperate with the proper authorities in furnishing such information or assistance as may be required. 2. Engineers shall undertake assignments only when qualified by education or experience in the specific technical fields involved 3. Engineers shall not affix their signatures to plans or documents dealing with subject matter in which they lack competence, but may affix their signatures to plans or documents not prepared under their direction and control where the engineer has a good faith belief that such plans or documents were competently prepared by another designated party. 4. Engineers may accept assignments and assume responsibility for coordination of an entire project and shall sign and seal the engineering documents for the entire project, including each technical segment of the plans and documents. 5. Engineers shall strive to be objective and truthful in professional reports, statements or testimony, with primary consideration for the best interests of the engineer's client or employer. The engineer's reports shall include all relevant and pertinent information in such reports, statements or testimony, which shall bear the date on which the engineer was retained by the client to prepare the reports.
Which of the following amplifiers has phase inversion?
A) common-emitter B) common-drain C) common-crystal D) common-collector