WorksheetsElectrical Fudnamentals
Total questions: 18
Worksheet time: 10mins
If the current to be measured is greater than the maximum current specified on the multi-meter ...
... the battery must be discharged until the measurement can be performed.
... a measurement device extension, e.g. current clamp, must be used.
... usually the current clamp has to be connected to mV and common terminal.
... measurement can still take place, but the result is inaccurate.
... so-called dummy consumers are installed.
In the series circuit, the total resistance is ...
... equal to the sum of the individual resistances.
... half the size of the largest partial resistance.
... always very low.
... less than the smallest partial resistance.
... it is higher than the highest partial resistance.
The voltage in a parallel circuit ...
... is largest immediately downstream of the positive terminal.
... is identical everywhere.
... can only be determined numerically.
... is always precisely as high as the current.
... can't be determined.
A multi meter can ...
... only measure current and voltage.
... measure current, voltage and power.
... only measure resistance and current.
... measure resistance, voltage and current.
... only measure voltage.
How many amperes are 1 mA?
1000 amperes
100 amperes
0.1 amperes
0.001 amperes
0.01 amperes
What are the meanings of terminal designations 30 and 87 on a relay?
30 control circuit coil end (battery negative).
87 control circuit coil input (battery positive).
30 operating current circuit input
87 operating current circuit output
30 is always connected to circuit 15.
87 is always connected to circuit 31.
30 control circuit coil input (battery positive).
87 operating current circuit input
Has no meaning.
Which statement about PWM signals is correct?
Ueff is always Us.
They are always sinusoidal.
The duty cycle is always the same for a PWM signal.
The pulse of a PWM signal is variable.
Which special features do CAN data lines exhibit?
No specific features need to be taken into account.
All data lines are twisted.
All data lines are green in color.
If a data line is defective, the entire wiring harness must always be replaced.
In the alternator test in a motor vehicle ...
…test can be carried out at any engine rpm range.
...the alternator current and voltage are tested under load.
...only the most necessary consumers may be switched on.
...only the current is tested without load.
...only the rated voltage is tested without load.
a complete loop without any breaks in it through which electric current flows
open circuit
closed circuit
