EBK 3N3-EBK: INDUSTRIAL MOTOR CONTROL
7th Edition
ISBN: 9780176919962
Author: Herman
Publisher: VST
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Textbook Question
Chapter 18, Problem 4RQ
Refer to the schematic shown in Figure 18–4. What type of switch is the low water switch?
- a. Normally open float switch
- b. Normally closed float switch
- c. Normally open held closed float switch
- d. Normally closed held open float switch
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Students have asked these similar questions
23. Draw the following symbols:
a. double acting, momentary contact push button.
b. normally open pressure switch
C. current transformer.
d. Normally closed float switch.
e. normally open limit switch.
F. normally closed switch.
Should the float switch be connected as a normally open or normally closed switch
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…
Chapter 18 Solutions
EBK 3N3-EBK: INDUSTRIAL MOTOR CONTROL
Ch. 18 - What are the two major types of control circuits?Ch. 18 - Prob. 2RQCh. 18 - Refer to the schematic shown in Figure 184. What...Ch. 18 - Refer to the schematic shown in Figure 184. What...Ch. 18 - What generally characterizes a three-wire control...Ch. 18 - Explain the function of a holding contact.Ch. 18 - Prob. 7RQ
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- The symbol shown is: Normally closed float switch Normally open held closed float switch Normally open float switch Normally closed held open float switcharrow_forwardThe symbol shown is: a. Double acting push button b. Two-position selector switch c. Three-position selector switch d. Maintained contact push buttonarrow_forwardRefer to Figure 21–1 to answer the following questions. In what position must switch SW 123 be set to make connection between terminals 3 and 4?arrow_forward
- Referring to the circuit in Figure 2–33, should the float switch be connected as a normally open or normally closed switch?arrow_forwardDescribe the function of a draft safeguard switch.arrow_forwardThe symbol shown is: Normally open pressure switch Normally open flow switch Normally open float switch Normally open temperature switcharrow_forward
- What is an SPST switch?arrow_forwardRefer to the circuit shown in Figure 16-11. Assume that the platform is located on the lower floor. When the UP push button is pressed, the platform rises. When the platform reaches the upper floor, however, the pump does not turn off but continues to run until the overload relay opens the overload contacts. Which of the following could cause this problem? a. The solenoid valve opened when limit switch LS1 opened. b. The UP push button is shorted. c. Limit switch LS1 did not open its contacts. d. Limit switch LS2 contacts did not reclose when the platform began to rise.arrow_forwardTo answer the following questions refer to the circuit in Figure 416. What is the purpose of the rotary switch connected after the pressure switch?arrow_forward
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