21:34 Sep 5, 2016 |
English language (monolingual) [PRO] Science - Nuclear Eng/Sci | |||||||
---|---|---|---|---|---|---|---|
|
| ||||||
| Selected response from: Piyush Ojha United Kingdom Local time: 10:19 | ||||||
Grading comment
|
SUMMARY OF ALL EXPLANATIONS PROVIDED | ||||
---|---|---|---|---|
5 +3 | return to normal or default state |
|
Summary of reference entries provided | |||
---|---|---|---|
RCIC Valve Controls |
|
Discussion entries: 5 | |
---|---|
reset return to normal or default state Explanation: The normal state of a switch in the mains unit of domestic electrical supply is 'ON' so that current flows in the circuit controlled by that switch. If excess current is drawn in that circuit, the switch trips (i.e. it is turned off) and must be manually reset to its normal 'ON' position. The normal state, however, is not always the default state. A new mobile phone, for example, comes with factory settings. This is its default state. The purchaser then customises it by installing apps, adding details of accounts, choosing a screensaver etc. This is the normal state of the phone but it can be reset to the default state at any time. I don't know whether the valve in your example is normally on or off, but resetting it puts it back in its normal state. |
| |