Lesson test: Building it and the first flight

1.[2p]
A smoke stopper is used on the first power-up because

it limits the current so a short trips it harmlessly instead of destroying the board

Correct

it makes the motors spin more smoothly

The answer is: it limits the current so a short trips it harmlessly instead of destroying the board

it charges the battery

The answer is: it limits the current so a short trips it harmlessly instead of destroying the board

it configures the firmware

The answer is: it limits the current so a short trips it harmlessly instead of destroying the board

2.[2p]
A cold solder joint is a problem because

it conducts intermittently and causes faults that come and go with vibration

Correct

it is too shiny to see

The answer is: it conducts intermittently and causes faults that come and go with vibration

it draws too much current

The answer is: it conducts intermittently and causes faults that come and go with vibration

it cannot be soldered again

The answer is: it conducts intermittently and causes faults that come and go with vibration

3.[1p]
All checks up to the first hover, including spinning the motors to verify their direction, are done with the propellers removed.

True

Correct

False

The answer is: True

4.[2p]
The classic takeoff flip is most often caused by

a motor spinning the wrong way or a propeller of the wrong handedness

Correct

too large a battery

The answer is: a motor spinning the wrong way or a propeller of the wrong handedness

a cold day

The answer is: a motor spinning the wrong way or a propeller of the wrong handedness

flying in acro mode

The answer is: a motor spinning the wrong way or a propeller of the wrong handedness

5.[2p]
Configuring the firmware before flight is mainly about

making the software's picture of the craft match how it is actually wired

Correct

increasing the motor speed

The answer is: making the software's picture of the craft match how it is actually wired

charging the battery

The answer is: making the software's picture of the craft match how it is actually wired

balancing the propellers

The answer is: making the software's picture of the craft match how it is actually wired

6.[2p]
The single question the first hover is meant to answer is

whether the craft holds roughly level and steady with the sticks centred

Correct

how fast it can fly

The answer is: whether the craft holds roughly level and steady with the sticks centred

how long the battery lasts

The answer is: whether the craft holds roughly level and steady with the sticks centred

whether the camera works

The answer is: whether the craft holds roughly level and steady with the sticks centred

7.[2p]
Tuning a craft that already hovers means

raising each PID gain until it shows its characteristic misbehaviour, then backing off

Correct

adding more motors

The answer is: raising each PID gain until it shows its characteristic misbehaviour, then backing off

lowering the battery voltage

The answer is: raising each PID gain until it shows its characteristic misbehaviour, then backing off

replacing the frame

The answer is: raising each PID gain until it shows its characteristic misbehaviour, then backing off

1.[2p] A smoke stopper is used on the first power-up because

2.[2p] A cold solder joint is a problem because

3.[1p] All checks up to the first hover, including spinning the motors to verify their direction, are done with the propellers removed.

4.[2p] The classic takeoff flip is most often caused by

5.[2p] Configuring the firmware before flight is mainly about

6.[2p] The single question the first hover is meant to answer is

7.[2p] Tuning a craft that already hovers means

1.[2p]
A smoke stopper is used on the first power-up because

2.[2p]
A cold solder joint is a problem because

3.[1p]
All checks up to the first hover, including spinning the motors to verify their direction, are done with the propellers removed.

4.[2p]
The classic takeoff flip is most often caused by

5.[2p]
Configuring the firmware before flight is mainly about

6.[2p]
The single question the first hover is meant to answer is

7.[2p]
Tuning a craft that already hovers means