Who discovered and named X-rays?

A. George Ohm
B. Wilhelm Roentgen
C. Gustav Kirchhoff
D. J.J. Thomson


Answer: B

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Technician A says that the reason for twisting the wires on a J1939 data backbone is to enable the data bus to act as a giant aerial. Technician B says that J1939 requires the data wire pair to cycle through one full cycle twist per 1 centimeter of length. Who is correct?

A. Technician A only B. Technician B only C. Both A and B D. Neither A nor B

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Compare and contrast the various tubes described in boiler operation.

What will be an ideal response?

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Do not plant trees or shrubs on dams because the roots can weaken the structure

Indicate whether the statement is true or false

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Where is a multi-layered steel (MLS) gasket most often used in an engine?

A) Oil pan gasket B) Valve cover gasket C) Head gasket D) Intake manifold gasket

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