Measurements are being discussed. Technician A says a magnifying glass is sometimes helpful when reading a vernier scale. Technician B says 24.5 mm equals one inch. Which technician is correct?

A. Technician A
B. Technician B
C. Both technicians
D. Neither technician


Answer: A

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A stack switch is a heat-actuated control that uses the stack temperature to indicate that the oil burner has or has not established a flame.

Answer the following statement true (T) or false (F)

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Materials that inhibit the flow of electrons are known as:

A. capacitors B. shells C. insulators D. conductors

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A resistance wire strain gauge with a gauge factor = 2 is bonded to a steel structure member subjected to a stress of 100 MN/sq.m. Modulus of elasticity of steel is 200 GN/sq.m. Calculate the percentage change in value of the gauge resistance due to the applied stress.

What will be an ideal response?

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By the end of the fifth century, the center of the Roman Empire had shifted to

a. Ravenna. b. Antioch. c. North Africa. d. Constantinople.

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