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WorksheetsWebinar Basic Electric
Total questions: 15
Worksheet time: 3mins
Name
Class
Date
1.
Which is the correct description of "Ohm's Low" for electricity ? Select the correct one
a)
The combined resistance with more than one resistance connected in series equal the value obtained by multiplying all the resistance value
b)
The value obtained by multiplying the resistance by the current equals the voltage
c)
The smaller the resistance become, the smaller the current is when the voltage is stable
d)
The current devided by the resistance equals are the voltage
2.
Which is the correct description of a 24 V battery connected in parallel to two bulbs whose resistance is 6 Ohm in lighting up ? Select the correct one
a)
The combined resistance with two bulbs llighting up is 12 Ohm
b)
The current following out of the battery is 4A
c)
The voltage per bulb is 12 V
d)
The current per bulb is 4 A
3.
Which is the correct description of the current when 50 W and 100 W lamps are connected to a battery in series
a)
The size of the currents of these lamps are the same
b)
The current of lamp close to the battery is larger
c)
The current of a 50 W is larger
d)
The current of a 100 W is larger
4.
Which is correct description of the degree of the resistance value "1 MOhm" Select the correct one
a)
Equal to 1000 mOhm
b)
Equal to 0.001 Ohm
c)
Equal to 0.001 KOhm
d)
Equal to 1000 KOhm
5.
If a tester indicates "4.9 Mv" when measuring the voltage, which is the correct value converted into the "V" unit ? Select the correct one
a)
0.049 V
b)
0.00049 V
c)
0.0049 V
d)
0.49 V
6.
Which is the correct judgement when checkig for an open circuit or short circuit by palcing the lead rod of the tester at both ends of the wire ? Select the correct one
a)
When the resistance value is infinity, an open circuit does not occur
b)
When the resistance value is 0 Ohm, an open circuit does not occur
c)
When the resistance value is 0 Ohm, an open circuit occur
d)
When the resistance infinity, a short ciscuit occur
7.
Which is the correct description of the battery electrolyte? Select the correct one
a)
The electricity to be supplied increase as the discharge rate increase
b)
The spesific gravity decrease (is lowered) as the battery is increasingly charged
c)
The specific grafity decrease (is lowered) as the temperature increase
d)
The self discharge amount increase as the temperature decrease
8.
Which is the correct description of the wire and electricity flow ? Select the correct one
a)
As the characteristic of a wire, the electrical resistance is smaller and electricity flows easily when the temperature is lower
b)
The wire internal resistance increase as the wire is longer, while it decreases as the length shortens
c)
In some electrical circuits, electricity flows from the point where the voltage is lower to the point where the volatge is higher
d)
The magnitude of the allowable current that can flow in one wire is the same as that of a bunch of the same wires even for a single wire
9.
Which is the incorrect description of the phenomenon of the electrical circuit ? Select the appropriate one
a)
The ground fault means that the machine body is connected to terminal on the negative side as a part of electrical circuit
b)
The voltage drop means that the internal resistance of the wire lowers the voltage
c)
The open circuit means that the conductor of electricity is broken and a broken coil of the solenoid valve is also included
d)
The short circuit means that two wires are directly but abnormally connected to each other
10.
If the following circuit turns ON, select the appropriate voltage at each point. Which is the appropriate voltage drop at resistance A if an open circuit occurs in solenoid valve B ?
a)
2 V
b)
22 V
c)
24 V
d)
0 V
11.
What component is excluded from the engine starting circuit ? Select the correct one
a)
Safety relay
b)
Battery relay
c)
Regulator
d)
Starting Motor
12.
Which is incorrect description of the starting motor ?
a)
When rotating the starting switch to start the engine, the starting currrent does not flow through the starting switch
b)
The starting switch is one of the rotary switches structurally
c)
The starting switch has 6 terminals, and some of these terminals are connected to the negative side of the battery
d)
The contact connection table is used to indicate selection of the starting switch circuit
13.
Which is the incorrect description regarding the alternator and reguator ?
a)
The adjustment voltage of the regulator is 24 V - 25 V for the 24 V electrical circuit
b)
The regulator retains the voltage even if the engine speed change
c)
The electricity generated by alternator lghts up a lamp and cahrges the battery
d)
The alternator itself is the AC generator, and the built-in diode rectifes and outputs DC
14.
What does the following symbol (graphic symbol) mean in the electrical circuit diagram ? Select the correct one
a)
Fuse
b)
Variable resistor
c)
Coil
d)
Fixed resistor
15.
Which is the correct description of how the safety relay installed in starting motor works ? Select the correct one
a)
Prevent starting motor from incorrect running when the engine is running
b)
Increase the battery current and enhances the starting motor speed
c)
Prevent the starting current from increasing excessively to protect the starting motor
d)
Reduce the surge and noice from the starting motor, and protect other electrical equipment
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