RAT Flashcards
When electromagnetic waves are restricted by the edge of an obstacle, some of the energy spreads into a region not directly in line with the source. This is referred to as:
a. Distraction.
b. Detection.
c. Diffraction.
d. Detraction.
c. Diffraction.
Of the following offences, which one would you NOT issue a penalty notice for?
a. A speed of 80 km/h in a 60 km/h area.
b. A speed of 92 km/h in a 80 km/h area.
c. A speed of 114 km/h in a 100 km/h area.
d. A speed of 83 km/h in a 80 km/h area.
d. A speed of 83 km/h in a 80 km/h area.
For effective operation, police radar relies upon:
a. Refraction.
b. Retraction.
c. Reaction.
d. Reflection.
d. Reflection.
An operator will not make any mistake due to cosine effect in patrol speed because:
a. it will always be in favour of the motorist.
b. the patrol speed of the police vehicle is always correlated with the digital speedometer during every radar speed check.
c. the doppler tone will always be high pitch and unclear.
d. the combined speed will incorporate any difference.
b. the patrol speed of the police vehicle is always correlated with the digital speedometer during every radar speed check.
What do the Mode/Antenna LEDs indicate on the Silver Eagle II?
a. That the instrument is receiving power.
b. That the instrument is in stationary mode.
c. That the instrument is in mobile mode.
d. All of the above.
d. All of the above.
The Doppler audio tone emitted by the Silver Eagle II Radar is the Doppler Shift Frequency:
a. divided down for listening comfort.
b. divided down by 6 in stationary mode of operation.
c. divided down by 12 in mobile mode of operation.
d. All the above.
d. All the above.
To calculate the Doppler shift frequency, the closing rate speed (in km/h) is multiplied by:
a. 64.6 Hz
b. 24.15 Hz
c. 44.7 Hz
d. 12.42 Hz
a. 64.6 Hz
A target speed is approaching you. You have a patrol speed but you have two horizontal lines in the target display. What could this indicate?
a. Differential effect.
b. Split speed.
c. The instrument is faulty.
d. A harmonic of the return frequency is detected.
d. A harmonic of the return frequency is detected.
Will a radar display a speed reading as a result of random movement?
a. Yes, if the movement is an electromagnetic impulse.
b. No, the Doppler Shift Frequency is too high.
c. No, the Doppler Shift Frequency is too low.
d. No, the movement must be continuous.
d. No, the movement must be continuous.
Which of the following is NOT one of the requirements for a valid radar speed check?
a. A clear, constant (if appropriate) tone.
b. Correlation between patrol speed and checked speedometer.
c. Minimum of 200 metres between targets of similar size.
d. Duration of the speed check may be less than 3 seconds.
d. Duration of the speed check may be less than 3 seconds.
A section 137 certificate covers all speeding offences issued:
a. 12 months prior to and inclusive of the offence date.
b. within 12 months from the certificate’s date of issue.
c. within two months of the date of the offence.
d. within six months of the date of offence.
b. within 12 months from the certificate’s date of issue.
Silver Eagle II radar instruments currently used by the NSW Police Force must be sent to the Radar Engineering Unit for periodic testing at intervals not exceeding:
Select one:
a. 3 months.
b. 6 months.
c. 12 months.
d. 18 months.
c. 12 months.
Electromagnetic energy:
a. is composed of an electric field and a magnetic field.
b. travels at 300 million metres per seconds.
c. will pass through most plastic.
d. All of the above.
d. All of the above.
How long does it take the Silver Eagle II to register a target speed?
a. About 2 seconds in stationary mode.
b. About 2 seconds in moving mode.
c. Almost instantaneously in stationary and moving modes.
d. About 2 seconds in stationary and moving modes.
c. Almost instantaneously in stationary and moving modes.
To overcome cosine effect the operator must bear in mind a distance ratio of (RADAR):
Select one:
a. 10:1.
b. 12.5:1.
c. 7:1.
d. 24.5:1.
c. 7:1.
When a Silver Eagle II fails an internal calibration test the radar displays:
Select one:
a. ‘ErX’ in the target display.
b. ‘ErX’ in the patrol display.
c. ‘Lo’ in the target display and ‘Vol’ in the patrol display.
d. The ‘Xtal Err’ lamp illuminates.
a. ‘ErX’ in the target display.
The tolerance of the Silver Eagle II tuning fork test is:
a. plus 2 km/h to minus 3 km/h.
b. plus or minus 2 km/h.
c. plus or minus 1 km/h.
d. plus 1 km/h to minus 2 km/h.
c. plus or minus 1 km/h.
The Silver Eagle II will not power up. You would:
a. charge the base.
b. attempt to repair the fault.
c. contact the Radar Engineering Unit for advice.
d. check the power outlet using a voltimeter and ensure it has power.
c. contact the Radar Engineering Unit for advice.
Cosine angle effect is negligible until what degree is exceeded?
a. 3
b. 5
c. 10
d. 15.
c. 10
The distances used to check the accuracy of the ProLaser 4 are:
a. 25 metres and 50 metres.
b. 25 metres and 75 metres.
c. 45 metres and 75 metres.
d. 45 metres and 80 metres.
a. 25 metres and 50 metres.
When performing a tuning fork test in moving mode, which tuning fork is held to the antenna first?
Select one:
a. 80 km/h.
b. 45 km/h.
c. 35 km/h.
d. It makes no difference.
b. 45 km/h.
What is the operating voltage range of the Silver Eagle II radar?
a. 11.1V to 13.5V.
b. 10.8V to 16.5V.
c. 8.0V to 14.0V.
d. 12.0V to 13.0V.
b. 10.8V to 16.5V.
When a speed is locked on the Silver Eagle II radar:
a. the locked target speed flashes in the target display.
b. the locked target speed flashes in the Lock/ET display.
c. it displays the locked speed and the HOLD lamp illuminates.
d. all the displays are locked on.
b. the locked target speed flashes in the Lock/ET display.
Accuracy of the digital speedometers fitted to HWP vehicles for speeds of up to 120 km/h is:
a. plus 2 km/h to minus 3 km/h.
b. plus or minus 2 km/h.
c. plus or minus 1 km/h.
d. plus or minus 3 km/h.
b. plus or minus 2 km/h.