ELECTRICAL WIRING:RESIDENT.-TEXT (PB)
19th Edition
ISBN: 9781337116213
Author: MULLIN
Publisher: CENGAGE L
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Chapter 19.1, Problem 18R
Because the controller contains the motor starting relay and the running and starting capacitors, the motor itself contains ______.
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The back emf in a dc motor is ___________________?.
1-opposes the applied voltage
2- aids the applied voltage
3- opposes the field current
4- aids the armature current
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Chapter 19 Solutions
ELECTRICAL WIRING:RESIDENT.-TEXT (PB)
Ch. 19.1 - Does a jet pump have any electrical moving parts...Ch. 19.1 - Prob. 2RCh. 19.1 - Where is the jet of the pump located?...Ch. 19.1 - Prob. 4RCh. 19.1 - Prob. 5RCh. 19.1 - Prob. 6RCh. 19.1 - Prob. 7RCh. 19.1 - What is compressed in the water storage tank?...Ch. 19.1 - Explain the difference between a 2-wire...Ch. 19.1 - Prob. 10R
Ch. 19.1 - Why is a 240-volt motor preferable to a 120-volt...Ch. 19.1 - How many amperes does a 1-horsepower, 240-volt,...Ch. 19.1 - What size are the conductors used for this branch...Ch. 19.1 - Prob. 14RCh. 19.1 - What provides the running overload protection for...Ch. 19.1 - What is the maximum ampere setting permitted for...Ch. 19.1 - Prob. 17RCh. 19.1 - Because the controller contains the motor starting...Ch. 19.1 - Prob. 19RCh. 19.1 - Proper pressure of the submersible pump system is...Ch. 19.1 - Fill in the data for a 16-ampere electric motor,...Ch. 19.1 - The NEC is very specific in its requirement that...Ch. 19.1 - Does the NEC allow submersible pump cable to be...Ch. 19.1 - Must the disconnect switch for a submersible pump...Ch. 19.1 - A metal well casing (shall) (shall not) be bonded...Ch. 19.2 - Prob. 1RCh. 19.2 - A major hazard involved with water heaters is that...Ch. 19.2 - Prob. 3RCh. 19.2 - The heating elements in electric water heaters are...Ch. 19.2 - An 80-gallon electric water heater is energized...Ch. 19.2 - Prob. 6RCh. 19.2 - For residential water heaters, the Consumer...Ch. 19.2 - An 80-gallon electric water heater has 60F...Ch. 19.2 - Approximately how long would it take to produce...Ch. 19.2 - Two thermostats are generally used in an electric...Ch. 19.2 - a. How many heating elements are provided in the...Ch. 19.2 - When does the lower heating element operate?...Ch. 19.2 - Prob. 14RCh. 19.2 - Prob. 15RCh. 19.2 - Prob. 16RCh. 19.2 - a. If both elements of the water heater in this...Ch. 19.2 - a. How much power in watts would the two elements...Ch. 19.2 - A condominium owner complains of not getting...Ch. 19.2 - For a single, nonmotor-operated electrical...Ch. 19.2 - A 7000-watt resistance-type heating appliance is...Ch. 19.2 - Prob. 22R
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- Please answer alll with brief explanationarrow_forward1. Fill in blanks. (1) can be used to prevent short-circuit. (2)There are two kinds of commander apparatuses which are and is often used to prevent motors from long-term overload. (4)According to the type of current passing through the main contact, electromagnetic contactors are classified into and (5)In multi-position control circuit, the start buttons are connected in are connected in (6)The partial-voltage starting includes starting and , the stop buttons starting.arrow_forwardAdvanced industrial motorarrow_forward
- In three-point starter, as a starting handle is rotated __________a) The resistance is added into armature circuitb) The resistance is removed from field circuitc) The resistance is added into field circuitd) Resistance is neither added nor removedarrow_forwardDraw the power circuit and control circuit of a Direct On Line Motor Starter fo a three-phase motor. Add 4 pilot lights (PL) in the control circuit; red PL for running forward, orange PL for running in reverse, green for not running and yellow for overload.1. List the components used. 2. Procedures.arrow_forwardFor the Starting Up the Power Station Simulator Why are certain operations blocked by isolatorsarrow_forward
- If an electrical defect occurs in the electronic powersteering(EPS) system, __ .a. the system continues to operate normally, but theEPS warning light is illuminatedb. the system continues to operate with a slightlyreduced power-steering assistc. the EPS control unit shuts the system down byopening the fail-safe and power relaysd. the EPS control unit locks the armature in thesteering gear to prevent armature and screw shaftdamagearrow_forwardThe NEC is very specific in its requirement that submersible electric water pump motors be grounded. Where is this specific requirement found in the Code? _______________________________________________________________________ _______________________________________________________________________arrow_forward20.a. A capacitive sensor is used to detect the presence of _______ objects.A. ferrousB. nonmovingC. nonconductiveD. magnetic20.b. A three-phase motor can be made to run backwards byA. connecting a resistor in series with the armature.B. reversing the control voltage connections.C. reversing three of its power leads.D. reversing two of its power leads.arrow_forward
- The disconnecting means for a motor controller shall be designed so that it does not _______ automatically per NEC 430.103 A. Open B. Close C. Restart D. Shutdownarrow_forwardIdentify the system which has low stability. a. None of the above b. Open loop and Closed loop system c. Open loop System d. Closed loop systemarrow_forwardTwo point starter can be used to start the three phase shunt generator/motor. Select one: True Falsearrow_forward
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