6-20.
The RTD elements designed for 600°F
or greater service are made of what
metal?
1.
Copper
2.
Nickel
3.
Platinum
4.
Silver
6-21.
As temperature increases around an
RTD, what will happen to the
corresponding resistance of the
RTD?
1.
It remains the same
2.
It increases by a proportional
value
3.
It decreases by a proportional
value
4.
It fluctuates erratically
6-22.
You are troubleshooting an RTD
circuit.
What is indicated by a
very low or zero meter reading?
1.
A short circuit
2.
An open circuit
3.
An abnormal reading; but not an
immediate problem condition
4.
A normal reading; circuit
malfunction is not indicated
6-23.
If the RTD of a 0° to 300°F meter
were to open, you would expect to
receive which of the following
indications?
1.
100°F
2.
200°F
3.
300 °F
4.
0°F
6-24.
At the shipboard level, what
corrective maintenance should you
perform on a defective RTD?
1.
Remove the RTD and repair it in
the shop
2.
Remove the RTD and replace it
with a new one
3.
Repair the RTD in place
6-25.
Meters on control consoles display
units of pressure or temperature;
but, they are actually what type of
meter?
1.
Ohmmeter
2.
Ammeter
3.
Dc voltmeter
4.
Wattmeter
6-26.
Voltmeters installed in
switchboards (SWBD) and control
consoles all have what type of
resistive value?
1.
Adjustable
2.
Variable
3.
Fixed
4.
Indefinite
6-27.
To allow an ammeter to handle high
SWBD current, what component is
installed with it?
1.
A current transformer
2.
A potential transformer
3.
A step-down transformer
4.
A step-up transformer
6-28.
A failing generator is being
operated in parallel with a good
generator.
Normally, the loss of
which of the following outputs
indicates this condition?
1.
Voltage
2.
Amperage
3.
Frequency
4.
Kilowatt load
6-29.
You are observing a synchroscope,
and the output frequency of the
oncoming generator and the on-line
generator is the same. What
indication will you receive from
the moving element (pointer)?
1.
It holds a fixed position
2.
It rotates slow in the fast
direction
3.
It rotates fast in the slow
direction
4.
It oscillates erratically
between the fast and slow
directions
34
