101 Basic Series - Module 29 - Post Assessment
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1
A closed transition transfer switch is called a break before make switch.
True
False
2
Identify which of the following apply to a molded case switch.
Contacts and arc chutes are completely enclosed
The switching devices are required to meet UL requirements for molded case circuit breakers
Borrow their design from Motor and Lighting Contactors
Are held to a more rigorous testing standard than the contactor type
3
________ are those systems that are so classified by municipal, state, federal or other governmental agencies having jurisdictions. These systems are intended to automatically supply power to selected loads. Transfer from the normal to the emergency load cannot exceed 60 sec.
Emergency system
Legally required standby system
Optional standby system
4
A transfer switch is a critical component of any standby power system. When the normal (preferred) source of power is lost, the transfer switch transfers from the normal source of power to the emergency (alternate) source of power.
True
False
5
A Molded Case Switch is a circuit breaker without a thermal trip element.
True
False
6
Because of the rigorous testing and standards, a transfer switch cannot be customized to a specific set of requirements.
True
False
7
Eaton's ATS installation using circuit breaker type disconnects and a service entrance option eliminates the need for separate upstream disconnect devices and respective power interconnections.
True
False
8
Which of the following can operate automatic transfer switches? (Select all that apply)
Manually operated
Solenoid operated
Motor operated
Twin stored energy
Rigid mechanical interlock
9
If there is a normal power source failure, emergency power can only be supplied from the utility supplying normal power.
True
False
10
The common phrases used to describe the types of switches are the "circuit breaker" type and the "contactor type". However, contactor type transfer switches do not use motor starting/lighting contactors and circuit breaker type transfer switches do not use circuit breakers.
True
False
11
UL has developed a comprehensive test standard for automatic transfer switches designated UL 1088.
True
False
12
A bypass isolation switch need not have the same withstand and interruption ratings as the transfer switch.
True
False
13
Some transfer switch manufacturers supply transformer panels in their equipment to allow simple control voltage field changes from one operating voltage to another.
True
False
14
In general, a backup power source should be part of any facility that depends on electricity to:
Preserve Life
Prevent Accidents
Prevent theft or panic
Prevent lost production time
All of the above
15
What makes up an automatic transfer switch?
Engine Starting, Transfer to Generator, Retransfer to Normal
Power Switching Device, Transfer Logic Controller, Control Power Source
Engine Starting, Transfer to Generator, Engine Shutdown
Bypass Isolation, Transfer To Generator, Transformer Panel
16
The standards and associated testing are the industry's determination as to whether or not a particular transfer switch design is capable of meeting a wide range of published operational and physical requirements.
True
False
17
An automatic transfer switch must have the ability to: (Select all that apply)
Close against high inrush currents
Carry full rated current continuously
Withstand fault currents
Interrupt current
18
A maintenance bypass switch is not required on a UPS installation in order to maintain and test the uninterruptible power supplies.
True
False
19
The transfer switch is only one element of the emergency power system and as such it's operation is not mandatory every time when called on to operate.
True
False
20
A transfer switch operates from normal to emergency and back to normal at the direction of operating personnel. Choose the description below that best describes this type of transfer switch.
Non- Automatic Transfer Switch
Manually operated Non -Automatic Transfer Switch
Manually initiated, electrically operated Non -Automatic Transfer Switch
Automatic Transfer Switch
None of the above
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