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WorksheetsSix week test
Total questions: 39
Worksheet time: 44mins
What should you always wear when soldering?
safety goggles
contact lenses
leather gloves
an apron
What should you never do with the metal part of the soldering iron?
touch it
lick it
place it on the counter
All of the above
What does soldering do?
joins metal for electrical connections
Melts metal to turn to liquid
tracks the sun
What is this?
soldering iron
solder
chip wick
flux
What is this?
soldering iron
solder
chip wick
flux
What are the basic tools required for soldering?
Soldering Iron, stand, sponge and wire cutters.
Soldering Iron, solder, stand, wire cutters and tile.
Solder, stand, sponge, wire cutter and tile.
Soldering Iron, stand, solder, sponge and wire cutters.
a method of removing the solder and components from circuit boards.
desoldering
soldering
select the function of soldering process ?
Repair purposes
Components replacement
Providing mechanical support by attaching various electrical components to PCBs
Troubleshooting PCBs
which soldering tool is shown in the picture?
soldering iron
solder wire
de soldering pump
soldering iron stand
What is a luminaire?
The lamp
The lamp holder
Wiring
Socket
All of the above
What is the allowance for light distribution and room surfaces called
Maintenance Factor
Utilisation Factor
Illuminanace
Intensity
What is the number used to measure the degradation of the light output of a lamp, allowing for dust and dirt?
A?
UF?
Don't know
MF?
Lux is the unit of
Luminous flux
Luminous intensity
Illumination
Luminance
An electrical component that we use in electronics circuits to limit current though an active component or to reduce voltage in the circuit.
Capacitor
Current
Resistor
Ancestor
What is the unit of measurement for resistance?
Voltage
Ampere
Watts
Ohms
A resistor's first three color bands are brown, black, and red. What is its value?
10 ohms
10K ohms
200 ohms
1000 ohms
Which digit on the 1st band does the color yellow denote on a resistor color band?
3
2
4
7
A 47K ohm resistor would have which colors on its first three bands?
Yellow, Violet, White
Yellow, Violet, Orange
Red, White, Blue
Orange, Yellow, Violet
The gold color band refers to__________tolerance.
+ / - 20%
+ / - 10%
+ / - 5%
zero
What are the color codes for a 470K ohm resistor?
Orange, Grey, Orange
Yellow, Violet, Yellow
Yellow, Violet, Orange
Orange, Grey, Yellow
What is the tolerance for a Red, Brown, Brown, Silver resistor?
1%
20%
5%
10%
What is the resistor value for Red Yellow Black?
24
240
140
2.4
What is the first step in measuring resistance in a circuit?
Turn the power off
Lick you finger and touch the resistor
Pour water on it
Hit it with a hammer
How to you calculate the total resistance in a series circuit?
R1 + R2+ R3
R1 - R2 - R3
1/R1 + 1/R2 + 1/R3
R1 = R2 = R3
How do you calculate total resistance in a parallel circuit?
R1 + R2 + R3
R1 - R2 - R3
1/R1 +1/R2 + 1/R3 = 1/RT
R1 = R2 = R3
What is the total resistance in this circuit?
600 Ω
600 kΩ
6 MΩ
6 kΩ
What is the effective resistance of this combination?
5 kΩ
1.2 kΩ
1 kΩ
833 Ω
What is the current flowing in this circuit?
20 μA
20 mA
20 nA
20 A
Two types of resistors
variable resistor
mount resistor
unvariable resistor
fixed resistors
With respect to recharging a primary or secondary cell, of the following statements, which one is correct?
The secondary cell can be recharged by passing current through it in the proper direction
The primary cell can only be recharged by changing the electrolyte
The primary cell can be recharged by passing current through it in the proper direction
The secondary cell can only be recharged by changing the electrodes
The lead-acid cell is an example of which of the following types of cells
The dry cell
The primary cell
The voltaic cell
The secondary cell
An example of a secondary cell is:
A button cell
An alkaline cell
A fuel cell
A car battery
Dry cells are connected in parallel in order to increase the:
Efficiency
Current Capacity
Life of the cells
Voltage rating
Which of the following is the purpose of an electrical cell?
To change mechanical energy to electrical energy
To change electrical energy to chemical energy
To change electrical energy to mechanical energy
To change chemical energy to electrical energy
