If the suction pressure of a system is 60 psig and the oil pump outlet is 85 psig, what is the net oil pressure?
A. 60 psig
B. 25 psig
C. 85 psig
D. 145 psig
Answer: B
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Anthony is comparing the quality of an $800 personal computer to one that costs $1,634
This is an example of the ________ of quality.
a. relative nature b. absolute nature c. conformance dimension d. price dimension e. None of these
A driver circuit
A) couples a low-current source to a higher-current device B) couples a low-impedance source to a high-impedance device C) provides regenerative feedback in a switching circuit D) directs a signal to one of n devices
In a series RLC circuit just below the resonant frequency, the impedance is:
A) at maximum. B) more capacitive. C) more inductive. D) at minimum.
The DC-DC converter of Figure 12.36 is used to control the speed of a DC motor. Let the supply voltage be 120 V and the armature resistance of the motor be 0.15?. The motor back-emf constant is 0.05 V/rpm, and the switching frequency is 250 Hz. Assume that the motor current is free of ripple and equal to 125 A at 120 rpm.
a. Determine the duty cycle of the converter ? and the converter on time t1.
b. Determine the average power absorbed by the motor.
c. Determine the apparent power supplied by the source.
