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Figure 52 shows a valve that is operated by a worm gear and motor. Each turn of the worm gear moves the stem by 0.18 cm, and the total range of stem travel is 4.0 cm. The worm gear motor has three states: A TTL high to the up terminal causes rotation at 15 rpm that moves the valve stem up, a TTL high to the down terminal causes rotation to reverse, moving the valve stem down (closing the valve), and with TTL low to both terminals the motor is off. The valve body is equal percentage with a rangeability of 20 and a maximum flow of 0.6 m3/min.
a. How many rotations of the worm gear are required for the full stem travel?
b. How long does it take to move the stem over the full range of travel? What is the minimum flow rate?
c. What is the stem position for flow at 90% of the maximum?
Suppose we want to construct an amplifier with a closed-loop gain of 50. We want the gain to vary by no more than +/- 5% while the open-loop gain varies by +/- 50%. Determine the values for a and b that will satisfy these constraints.
The potentiometer extends between positions 1.9 cm and 54.6 cm on the scale. The voltage read by the DMM is 1.000 V and the current read the by DMM is 42mA. What is the resistance per unit length of the nichrome wire
Consider the CMOS RAM cell and data lines in Figure. - Determine the steady-state values of D. - Neglect the body effect.
For the situation of given problem, determine when the discharge current is one-half its maximum value if contact is made at t = 0 s. - How long will it take to discharge the capacitor?
Calculate the new mud developed by the coil and the peak flux and what is meant by mutual flux? by leakage flux?
Resistors R1 -8 Ω, R2 -4 Ω and R3 -6 Ω, are connected in series to a voltage source. Which resistor will dissipate the most power
It is operating at 50% of its rated load at a power factor of .5 leading, compute efficiency using both exact and approximate equivalent circuits as referred to the primary side. Tabulate the percent errors in the currents, voltages, powers
A coil with an impedence of 64.1 angle 51.4 degrees is connected in series with a resistance 22.5 ohms. The combination is supplied by 120 V source. Determine the coil and resistor voltages and the overall power factor.
Technician A says that a fault code indicating a coolant temperature sensor problem could be the fault of a defective coolant-temperature sensor or its circuit. Technician B says that a fault code indicating a coolant temperature sensor problem co..
When a cloud passes over a certain spot on the surface of the earth a vertical electric field of E = 100 V/m is recorded there. The bottom of the cloud is a height d = 300m above the earth and the top of the cloud is 600m above the ground.
Calculate Is and the current I for V = 700 mV for a pn junction for which Na = 1017 / cm³, Nd = 1016 / cm³, A = 200 µm², ni = 1.5 x 10^10 / cm³, Lp = 5 µm, Ln = 10 µm, Dp = 10 cm² / s, and Dn = 18 cm² / s
Draw logical circuit for boolean equation F1=X'.Y'.Z+X'.Y.Z+X.Y'
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