Technician A says that the starter motor used to crank diesel engines can draw up to 400 amps of current. Technician B says that high resistance on the insulated side of a starter motor circuit would cause higher than specified starter motor current draw. Who is correct?

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


Answer: A

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A bipolar BLDC motor with k? = 1.0 Vs is running at regenerative braking mode. The dc voltage source is 180 V. The armature resistance of the motor is 1.0 ?. The measured current is 10 A and is continuous. Compute the developed torque, the power delivered to the source, and the speed of the machine.

What will be an ideal response?

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The following statements are all correct EXCEPT ________

A) Waste-spark systems use a signal from the PCM once the engine is running. B) Waste-spark systems do not need a timing signal from the PCM when cranking the engine. C) No ignition system uses the PCM to control ignition timing. D) Up-integrated ignition controls use the PCM to control ignition timing.

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In the article “Influence of Crack Width on Shear Behaviour of SIFCON, the maximum shear stress ? of a cracked concrete member is given to be , where is the maximum shear stress for a crack width of zero, w is the crack width in mm, and k is a constant estimated from experimental data. Assume . Given that =50 MPa and w=1.0 mm, both with negligible uncertainty, estimate ? and find the uncertainty in the estimate.

What will be an ideal response?

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The paste command normally sends its output to ____.

A. stdout B. null C. stderr D. the file indicated as an argument

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