| Examination
Questions (page 339) |
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1(a)
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Data
Logging |
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(b)
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(i)
(ii) |
Heat/temperature sensor.
To take the temperature at set times during the day. |
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(c)
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(i)
(ii)
(iii) |
Any figure in the range 5 to 30 minutes.
A sufficient number of readings should be taken so that an accurate
graph can be produced.
As a table or graph/chart. |
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2(a)
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Boxes
should be filled in the following order: Download information;
Add information to regional weather file; Save regional weather
file. |
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(b)
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Need
to have a diagram in the following order: Computer at the regional
weather centre-modem-telephone network-modem-computer at remote
weather station. |
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(c)
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(i)
(ii) |
Following should be ticked: Restarting the system wastes time
as the same information may be collected from the same remote
weather stations on several occasions. The information available
is not collected if part of the system is faulty.
Systems analysis and design Monitoring and evaluation |
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(d)
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It is quicker since you do not need to visit the weather stations
to collect the information. It is more reliable-data is always
collected regularly at the same time. It is cheaper to collect
the information since no need for extra employees to pick up
the data. System is expensive to set up. Breaks in communication
lines are hard to find. |
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3(a)
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(i) |
Wind
speed is continuous, so it is an analogue quantity. |
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(ii) |
An
analogue to digital converter. |
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(b)
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Any
two similar to the following:
Readings may be taken regularly even during holidays.
The readings will be more accurate as there is no human error.
No need to input the data into the computer.
Data can be processed immediately. |
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