Electric Motors and Control Systems
2nd Edition
ISBN: 9780073373812
Author: Frank D. Petruzella
Publisher: McGraw-Hill Education
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Chapter 2.5, Problem 1DT
To determine
The reason for the contact of control devices is not placed in parallel with loads.
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Select the proper choice(s) for each of the following statements:
1) To control single-acting cylinder we just need:
double-acting cylinder we should use
A2/2-way, 5/2-way,
(C) 3/3-way, 3/4-way,
2) In
DCV.
(B) 3/2-way, 4/2-way,
(D) 4/3-way, 3/2-way.
mid poistion of DCV, we can move cylinder piston rod freely without
resistance by hand.
(A) working ports are exhausted,
(C) working ports are pressurized,
3) In pneumatics we use
A Compressor
(B) Pump,
DCV, while to control the
4) Quick exhaust valve is used to
(A) increase the cylinder return speed.
(C) meter-out the cylinder speed
(B) all ports are closed.
no one of these options.
to obtain high pressure air.
(C) Turbine,
(D) pressure relief valve.
(B) meter-in the cylinder speed,
(D) increase the cylinder extending speed.
6) Meter-in of cylinder movement is used to control the
Afluid that enters the hydraulic cylinder,
(B) fluid that exits the hydraulic cylinder,
(C) fluid that enters the DCV
(D) fluid that exits the DCV.
5) One of the…
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.
What is the difference between Momentary Contact and Maintained Contact?
Chapter 2 Solutions
Electric Motors and Control Systems
Ch. 2.1 - Define the term motorcontrol circuit.Ch. 2.1 - Why are symbols used to represent components...Ch. 2.1 - An electrical circuit contains three pilot lights....Ch. 2.1 - Describe the basic structure of an electrical...Ch. 2.1 - Prob. 5RQCh. 2.1 - The contacts of a pushbutton switch open when...Ch. 2.1 - A relay coil labeled TR contains three...Ch. 2.1 - A rung on a ladder diagram requires that two...Ch. 2.1 - Prob. 9RQCh. 2.1 - The wire identification labels on several wires of...
Ch. 2.1 - A broken line representing a mechanical functionon...Ch. 2.2 - What is the main purpose of a wiring diagram?Ch. 2.2 - In addition to numbers, what other method can...Ch. 2.2 - Prob. 3RQCh. 2.2 - Prob. 4RQCh. 2.2 - Prob. 5RQCh. 2.2 - What is the main purpose of a single-line diagram?Ch. 2.2 - Prob. 7RQCh. 2.2 - Prob. 8RQCh. 2.3 - Prob. 1RQCh. 2.3 - Prob. 2RQCh. 2.3 - Prob. 3RQCh. 2.3 - Prob. 4RQCh. 2.3 - Prob. 5RQCh. 2.3 - Prob. 6RQCh. 2.3 - In what phase configurations are AC induction...Ch. 2.3 - Prob. 8RQCh. 2.3 - Prob. 9RQCh. 2.3 - Prob. 10RQCh. 2.3 - Prob. 11RQCh. 2.3 - Prob. 12RQCh. 2.3 - Prob. 13RQCh. 2.3 - Prob. 14RQCh. 2.3 - Prob. 15RQCh. 2.3 - Prob. 16RQCh. 2.3 - Prob. 17RQCh. 2.3 - Prob. 18RQCh. 2.3 - Prob. 19RQCh. 2.3 - Prob. 20RQCh. 2.3 - Prob. 21RQCh. 2.3 - Prob. 22RQCh. 2.4 - Interpret what each of the following pieces of...Ch. 2.4 - List three applications where a motor service...Ch. 2.4 - Prob. 3RQCh. 2.4 - Prob. 4RQCh. 2.4 - Prob. 5RQCh. 2.4 - Prob. 6RQCh. 2.4 - Prob. 7RQCh. 2.4 - Prob. 8RQCh. 2.5 - How are the contacts of a manual motor...Ch. 2.5 - Prob. 2RQCh. 2.5 - Prob. 3RQCh. 2.5 - Prob. 4RQCh. 2.5 - Prob. 1TCh. 2.5 - Prob. 2TCh. 2.5 - Prob. 4TCh. 2.5 - Prob. 5TCh. 2.5 - Prob. 6TCh. 2.5 - Prob. 1DTCh. 2.5 - Prob. 2DTCh. 2.5 - Search thelnternet forelectric motor...Ch. 2.5 - Prob. 4DTCh. 2.5 - Prob. 5DT
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- What pin numbers are connected to the coil of an 8-pin control relay?arrow_forwardPower-consuming devices are wired in _____(series orparallel).arrow_forwardAn 11-pin control relay contains three sets of single-pole double throw contacts. List the pin numbers by pairs that can be used as normally open contacts.arrow_forward
- Describe one of control section component which is used to operate double acting cylinder of having 3 position and 4 ports with the electrical, mechanical and manual method of actuation.arrow_forwardA three-pole contactor would allowhow many paths for current flow?arrow_forwardIf 4 links are connected at the same joint, the joint is equivalent to binary joint.arrow_forward
- In a DC machine, armature shaft is generally supported at the both ends by Brushes Bearings Yoke Commutatorarrow_forwardExplain the Interruption Cycle with neat sketch.arrow_forwardRefer to the circuit shown in Figure 7-10. If wire number 11 were disconnected at the normally open auxiliary M contact, how would the circuit operate? Figure 7-10 Numbers are placed beside all components.arrow_forward
- 5 position and 2-way type of ports DCV could be used in the double acting actuator circuit. Select one: True Falsearrow_forwardName Section 5-2: Line Diagrams-Signals, Decisions, and Actions In the following application, a temperature switch controls a heating contactor and a flow switch is used to ensure there is enough air flow. If there is not enough air flow, an alarm is sounded. Complete the required information. 1. List all the signal devices in the circuit. 2. List all the action devices in the circuit. 3. List the decision part of the circuit that automatically sounds the alarm if there is a problem. 4. When the heating element is on during normal operation, is the flow switch open or closed? CIRCULATING 2 L1 FAN TEMPERATURE SWITCH TR HEATING ELEMENTS FLOW SWITCH -HOT AIR PADDLE AIR FILTER NORMALLY CLOSED FLOW SWITCH 65 ALARM (SOUNDS IF NO FLOW FOR 15 SECONDS OR MORE) Date HEATING CONTACTOR TR ON-DELAY TIMER SUPPLY AIR COLD AIR (3) TIME SET= 15 SEC © 2014 American Technical Publishers, Inc. All rights reservedarrow_forwardBending Tool Problem: Sheet metal is to be bended on a pneumatically actuated bending rig. After it has been clamped the piece is initially bent by a double-acting cylinder A and subsequently bent into the finished form by cylinder B. The sequence is initiated manually by a push button. The circuit must be so constructed that each time a start signal is given a full cycle is completed. Draw the pneumatic circuit diagram of the given problem Positional Sketch:arrow_forward
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