Understanding Motor Controls
Understanding Motor Controls
4th Edition
ISBN: 9781337798686
Author: Stephen L. Herman
Publisher: Delmar Cengage Learning
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Chapter 42, Problem 7RQ
To determine

The option which could not cause the inability to accelerate to second and third speed.

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In relation to the circuit presented below, mark the alternative(s) that you consider correct. 1 To enable actuator A2 to advance, it is necessary to switch valve V2 to the leftmost position and ensure that valve V1 is in its initial (intermediate) position. 2 Switching valve V2 to the leftmost position allows actuator A2 to advance, but for this to happen, valve V1 must also be switched to the leftmost position. 3 When activating valve V1, using the locking lever installed on the left side of it, the two actuators (A1 and A2) are allowed to advance. 4 Hydraulic pump B1 is a simple variable displacement type. 5 Valves V1 and V2 have a TANDEM center.
5 position and 2-way  type of ports DCV could be used in the double acting actuator circuit.    Select one: True False
Boxes (or certain production parts) are moved by a double-acting cylinder away from a gravity-feed magazine towards an assembly device. A push button and a pedal switch are to be incorporated in the circuit. The cylinder is to move out when either of these is actuated. The return stroke is actuated by the cylinder rod after it reaches the end of the forward stroke. Draw the pneumatic circuit diagram using ISO symbols and connecting the ports with solid lines.
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