Quiz: The Science Of Electricity
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Electricity is the presence and flow of electric charge. Electricity is a form of energy that comes in positive and negative forms, that occur naturally or is produced. When it comes to electricity, safety is of importance. Test your knowledge on safety measures about electricity based threats and accidents using the quiz below. Stay safe!
- 1.Electrical devices can retain potentially lethal voltages.
- A.
True
- B.
False
- 2.Do not touch equipment or cables that have been exposed to fluids.
- A.
True
- B.
False
- 3.Report all cabling problems to your instructor after class.
- A.
True
- B.
False
- 4.After disconnecting cables from equipment, it is not necessary to fit a protective cap over each end to prevent moisture and dirt from damaging the sockets.
- A.
True
- B.
False
- 5.It is OK to bend cables tightly to fit equipment.
- A.
True
- B.
False
- 6.Inspect all power connections for worn or loose plugs every time you use them.
- A.
True
- B.
False
- 7.Switch off the power before connecting or disconnecting power cables.
- A.
True
- B.
False
- 8.It is OK to touch power source internal parts with bare hands.
- A.
True
- B.
False
- 9.To prevent fire, do not place electrical equipment close to combustible materials.
- A.
True
- B.
False
- 10.It’s ok to consider adapting pieces by grinding them to fit the robot without teacher supervision if you’re in a hurry.
- A.
True
- B.
False
- 11.Inspect all tools and materials for safe storage every day.
- A.
True
- B.
False
- 12.If a piece of equipment is not working, open it up and see if you can fix it.
- A.
True
- B.
False
- 13.It is OK to handle equipment with wet hands or feet even if the equipment is plugged in.
- A.
True
- B.
False
- 14.Dispose of used batteries in the garbage.
- A.
True
- B.
False
- 15.The amount of electricity used in solderless breadboards (max voltage 5V) can cause a heart attack?
- A.
True
- B.
False
- 16.The purpose of the "third wire" on a three-pronged plug is to "ground" leaking or stray electricity?
- A.
True
- B.
False
- 17.When you unplug a tool, you should pull the electrical cord?
- A.
True
- B.
False
- 18.You should never leave a running machine unattended, however, you can leave powered breadboard unattended because there is no moving parts there?
- A.
True
- B.
False
- 19.Which of the following problems can faulty electrical equipment cause?
- A.
Shock.
- B.
Fire
- C.
Explosion
- D.
All of the above
- 20.Which statement is TRUE about low voltage circuits (5 - 9 V)
- A.
At low voltages (5-9V), the major risk is the risk of burns from high current short circuits
- B.
Electrical circuits with low voltages (5-9V) cannot cause short circuits, because the voltage is too low
- C.
Even low voltages (5-9V) circuit can supply 20 amps of current ,that is why there is a major risk for human to get heart attack or shock
- D.
All of the above
- 21.The ratings for four typical domestic appliance fuses are given below. Which is the safest fuse to use for an appliance with a normal operating current of 2A
- A.
13A
- B.
3A
- C.
8A
- D.
5A
- 22.Which of the following statements is NOT correct?
- A.
Electricity always travels to ground
- B.
Electricity tries to travel to ground
- C.
Electricity takes the path of lease resistance
- D.
Electricity travels in a complete circuit
- 23.A current even as low as ______ can be felt by the body
- A.
1 Amp
- B.
6 Volts
- C.
1 mAmp
- D.
6 Ohms
- 24.Which part of the human body offers the most resistance to electricity
- A.
Fingers
- B.
Toes
- C.
Wet skin
- D.
Thick and/or dry skin
- 25.The greater the body's resistance to electricity, the ____ amount of harm to the person
- A.
Less
- B.
Greater
- C.
Resistance has no effect on electricity
- D.
Equal
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