List three operating problems associated with operating a boiler.
What will be an ideal response?
Typical boiler problems include; loss of water flow, scale, impurities in steam or water, improper water level, flame failure, tube rupture, soot buildup in superheater and economizer tubes, and flame impingement.
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The lifting capacity of a block and tackle is higher if it has _____.
a. more parts of line b. more hooks c. bigger hooks d. more shackles
New plant hybrids have not been developed since the beginning of the 20th century
Indicate whether the statement is true or false
Which of the following statements refers to the feedback rule or signal flow?
A) The sealing instruction is an example of this type signal flow. B) Test the midpoint block output between the brackets, depending on the test results one of the brackets moves to the middle. C) If all convergent inputs are required to produce a valid output, then a valid output indicates that all input paths are fault-free. D) Assume that brackets enclose the power supply that provides power to three other blocks in the diagram. If power is delivered to one of the system blocks, then the power supply is not the problem.
Conductivity tests are sometimes known as _____ tests
A) penetrant B) megger C) ultrasonic D) holiday