Motor Control 1 Test Review
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| The capacity of ? is determined by the current ratings of their power contacts for continuous and inrush current conditions. | show 🗑
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| show | Branch circuit and control circuit components.
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| show | The motor
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| show | Control circuit components and Conductors
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| NEMA and IEC overload relays respond to overload conditions based on ? . | show 🗑
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| show | electronic
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| Most thermal and magnetic overload relays are connected in ? with the motor power circuit, so all ? flowing to the motor must flow through the overload. | show 🗑
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| Overloads are sized based on motor full load current (FLC), contactor size, the motor service factor (SF), ambient temperature and the class number requirement. T/F | show 🗑
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| Ch1 TEST INFO | show 🗑
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| show | Nikola Tesla
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| According to a 1998 Department of Energy survey, what percentage of electricity used in the United States was used to drive electric motors? | show 🗑
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| What organizations are the standards-setting organizations for motor control devices? | show 🗑
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| NEMA's first national standards effort was called the ??? | show 🗑
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| The IEC (International Electrotechnical commission) produces standard publications under a number of document formats, what are they? | show 🗑
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| show | IEC
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| As a standards organization, which of the following document formats are used with IEC standards? | show 🗑
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| show | operator
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| show | NEMA / IEC
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| The position of the actuator at which the contacts snap to the operated contact position. | show 🗑
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| show | Overtravel (OT)
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| Automatically operated input devices are switches triggered by a change in a ? parameter, such as liquid level, pressure, fluid flow, and material temperature. | show 🗑
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| show | Positive pressure switch, Vaccuum switch and differential pressure switch.
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| show | monitor
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| show | electromagnet
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| show | Solenoid
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| show | electrical
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| The machine control relay is an ??? relay that consists of several contacts available with up to 12 contacts. | show 🗑
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| show | heavy duty
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| show | Most
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| show | Positive
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| ??? Pressure switches measure the difference in pressure from two different sources. | show 🗑
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| show | Positive/ Negative
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| Machine control relays are available in up to how many contacts? | show 🗑
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| Machine control relays provide easy access for ??? maintenance and generally have a long life. | show 🗑
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| show | 300 to 600
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| show | 600
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| show | contactors/ Twice
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| show | high-powered / low-powered
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| Contacts on relays that can be configured as either normally open contacts or normally closed contacts are called ? contacts. | show 🗑
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| The NEMA standard specifies that AC magnetic motor starting devices must function at voltages as low as ? of the rated coil voltage. | show 🗑
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| Some industrial applications require fuse protection on one ? line and in both ? lines. | show 🗑
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| The use of fuses on the primary and secondary side of a control transformer is specified by the ? . | show 🗑
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| show | 50 V
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| The major difference between the standard for contactors and motor starters is the ???? of the control device for a given motor or resistive load. | show 🗑
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| show | Manual Contactor
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| magnetically activated switching device, without an overload protection device attached, to switch single phase or three phase AC power or DC power to the load | show 🗑
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| show | Definite purpose magnetic contactor
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| magnetically activated switching device that includes a magnetic contactor and an attached overload protection device, to switch single phase and three phase power for AC motor control and power for DC motor control | show 🗑
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| Manual motor starter are used to control small motors, such as ?????? Horsepower and ?????? horesepower motors, found in commercial and industrial applications. | show 🗑
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| show | overload
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| show | Combination
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| show | Thermal, magnetic, and electronic
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| show | 24 to 600 V AC
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| Most magnetic motor starters are supplied with at least one NO auxiliary contact; this contact is used for electrical ? or start pushbutton ? requirements in the control circuit. | show 🗑
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| Three types of overload relays, thermal, magnetic, and electronic, with DIFFERENT operational principles, protect the motor from OVERLOAD current. T/F | show 🗑
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| Motor current is proportional to motor load and an INDICATION of the ????? in the windings. Overload relays on the motor starter monitor motor power in the circuit and open the power circuit when excessive motor current occurs. | show 🗑
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| CT's | show 🗑
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| show | On Delay Timer
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| show | operate
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| show | True
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| show | Delay on Energize
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| DODE stands for | show 🗑
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| show | Normally Open Timed Open
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| Go over page 131 | show 🗑
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| show | synchronous
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| show | 15
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| show | lighting
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| Most thermal and magnetic overload relays are connected in ? with the motor power circuit, so all ? flowing to the motor must flow through the overload. | show 🗑
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| An ? timer is a device with a preset time period between energizing the timer or applying the input signal and the action of the timer output contacts. During the timing period, no change occurs in the timer output contacts. | show 🗑
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| Once initiated, ? contacts change state after a set time period has passed. Once the time has passed, all normally open timed contacts close and all normally closed timed contacts open. | show 🗑
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| show | off-delay
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| show | 0.01
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| show | hundreds
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| show | 1. Visually inspect for damage or deterreoration 2. verify that the correct power is applied to the timer, 3. verify proper timer contact operation.
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| show | components and functions
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Created by:
Shawnt321