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.
If the radar power supply voltage drops below 10.8 volts:
a. the Silver Eagle II would cease to operate.
b. the letters ‘CHK VLT’ are displayed in the Target and Patrol windows.
c. the device operates intermittently.
d. the device would continue to operate normally.
a. the Silver Eagle II would cease to operate.
The transmitter frequency of the Silver Eagle II radar is:
a. 25.140 GHz
b. 24.150 GHz
c. 34.900 GHz
d. 44.700 GHz
c. 34.900 GHz
To adjust the audio squelch/unsquelch mode an operator would:
a. press and hold the mode switch for approximately 3 seconds.
b. press the range switch and then the mode switch.
c. press the audio switch and then the mode switch.
d. press the test switch and then the audio switch.
c. press the audio switch and then the mode switch.
Which of the following statements is incorrect?
a. A certified digital speedometer must be fitted to all HWP vehicles when used for check speed enforcement.
b. If a digital speedo ceases operation, speed enforcement may continue if patrol speed is correlated to analogue speedo.
c. A certified digital speedo must be fitted to all HWP vehicles used for mobile radar speed enforcement.
d. If one or both of the tamper proof seals have been damaged or removed, all speed enforcement is to cease immediately.
b. If a digital speedo ceases operation, speed enforcement may continue if patrol speed is correlated to analogue speedo.
What are the two main factors you need to consider in regards to Inverse Square law?
a. The reflective area and colour of the target vehicle.
b. The speed of the target vehicle and the distance between the radar antenna and target vehicle.
c. The reflective area of the target vehicle and the distance between the radar antenna and target vehicle.
d. The lane of travel of the target vehicle and the speed of the patrol vehicl
c. The reflective area of the target vehicle and the distance between the radar antenna and target vehicle.
The accuracy of the Silver Eagle II Radar in stationary mode is plus or minus:
a. 2 km/h.
b. 1 km/h.
c. 3 km/h.
d. 4 km/h.
a. 2 km/h.
When used operationally, the radar antenna must be set up:
a. externally during inclement weather.
b. internally during inclement weather.
c. less than 2 metres from the front of the vehicle.
d. between 1 and 2 metres from the ground.
d. between 1 and 2 metres from the ground.
In accordance with operating guidelines and responsibilities, radar must not be used within 50 metres of a change in speed zone:
a. except where speed is excessive (e.g. more than 20 km/h above the applicable speed limit).
b. unless authorised by a commissioned police officer.
c. unless authorised by the Region Traffic Tactician.
d. if it is likely to generate criticism.
a. except where speed is excessive (e.g. more than 20 km/h above the applicable speed limit).
While patrolling you come up behind a large slow moving truck. You release the beam and the resulting displayed patrol speed does not correlate with the check speedometer of the police vehicle. This is caused by:
a. Cosine Effect.
b. Random Movement Effect.
c. Harmonic Detection.
d. Differential Speed Effect.
d. Differential Speed Effect.
The Doppler Shift Frequency is the:
a. frequency received from a moving target.
b. frequency required to cause an audible tone.
c. transmitted frequency plus the received frequency.
d. difference between transmitted and received frequencies.
d. difference between transmitted and received frequencies.
At a range of 400 metres the width of the radar beam is approximately:
a. 21 metres.
b. 210 metres.
c. 84 metres.
d. 840 metres.
c. 84 metres.
The ‘45’ tuning fork:
a. can never cause a display other than 45.
b. may cause the numerals 44 or 46 to appear in the display depending on ambient temperature.
c. is used to simulate a closing rate speed.
d. is subtracted from the 80 fork to determine patrol speed.
b. may cause the numerals 44 or 46 to appear in the display depending on ambient temperature.
Movements of a random nature:
a. can cause a speed to register.
b. cannot cause a speed to register but will almost certainly cause a reduction in the effective range.
c. cannot cause a speed to register but will almost certainly cause an increase in the effective range.
d. can cause a speed to register only if constant for more than 10 seconds.
b. cannot cause a speed to register but will almost certainly cause a reduction in the effective range.
Applying the 7:1 ratio ensures any cosine angle is kept within acceptable limits. This would be about:
a. 8 degrees or less.
b. 12 degrees or less.
c. 16 degrees or less.
d. 20 degrees or less.
a. 8 degrees or less.
In moving mode the Silver Eagle II radar will display a target speed:
a. only after it establishes patrol speed.
b. without a patrol speed being present.
c. before it establishes patrol speed.
d. only when it exceeds the radar’s minimum speed threshhold.
a. only after it establishes patrol speed.
Police radar instruments use a transmitter which emits a:
a. continuous wave only in stationary mode.
b. pulsed signal in stationary and moving modes.
c. continuous wave to determine the relative velocity of a target.
d. pulsed wave to determine the relative velocity of a target.
c. continuous wave to determine the relative velocity of a target.
Cosine effect will always be:
a. in favour of the motorist in stationary and moving modes.
b. in favour of the motorist in stationary mode and at most times in moving mode.
c. against the motorist in stationary mode only.
d. against the motorist in moving mode only.
b. in favour of the motorist in stationary mode and at most times in moving mode.
Radar may be operated on downhill grades:
a. only if it is a complaint area.
b. provided it does not engender legitimate criticism.
c. only during daylight hours.
d. only if the radar has been calibrated for downhill grades.
b. provided it does not engender legitimate criticism.
What is the manufacturer’s accuracy of the Silver Eagle II Radar unit in moving mode?
a. Plus 2 km/h or minus 1 km/h.
b. Plus or minus 1 km/h.
c. Plus or minus 2 km/h.
d. Plus 2 km/h or minus 3 km/h.
d. Plus 2 km/h or minus 3 km/h.
You press the Test button momentarily and ‘Pas’ appears in the target display only. This indicates:
a. the instrument is in stationary mode.
b. the instrument must be returned for repair.
c. the radar is operating normally for moving mode.
d. the wrong test button has been pressed.
a. the instrument is in stationary mode.
The Silver Eagle II radar beam spreads out at an angle of:
a. 6 degrees plus/minus 1 degree at the half power points.
b. 12 degrees plus/minus 1 degree at the half power points.
c. 6 metres plus/minus 1 metre at the half power points.
d. 12 metres plus/minus 1 metre at the half power points.
b. 12 degrees plus/minus 1 degree at the half power points.
The size of a target vehicle:
a. effects the doppler frequency.
b. is unimportant when operating a Silver Eagle II radar.
c. is important only when operating in moving mode.
d. is relative to the effective range of the radar.
d. is relative to the effective range of the radar.
Incorrect antenna alignment:
a. may affect patrol/target speed accuracy.
b. only affects range.
c. only affects patrol speed accuracy.
d. None of the above.
a. may affect patrol/target speed accuracy.
When are the digital speedometers fitted to HWP vehicles required to be certified?
a. Initially when the vehicle is received from Fleet Services.
b. Prior to the vehicle being returned to Fleet Services.
c. At a period not exceeding 12 months from the initial certification.
d. All of the above.
d. All of the above.
