ELECTRICAL SAFETY QUIZ
1. Electrical supply used in our house is -------------.
(230 v)
2. Two lines used in single-phase supply are--------------, ---------------.
(Phase, Neutral)
3. Switches must be connected in-----------line.
(Phase)
4. The nature of supply from battery cell is-------------voltage.
(DC)
5. Emergency light glows when mains supply-----------.
(Fails)
6. The frequency of our electric supply is -------------Hz.
(50Hz)
7. The earth in electric circuit is ------------.
(Low resistance electric path)
8. Earth resistance can be measured by----------------.
(Megger)
9. The unit of resistance is ----------
(Ohms)
10. Fuse ----------the electric circuit /equipment/user when abnormal flow of electric supply is there.
(Protects)
11. Shock will occur when we come into contact with-----------,----------,------------.
(Phase and neutral (or) Phase and earth (or) Phase to phase)
12. The insulator is --------------for electricity.
(Non-conductor)
13. Porcelain is an example for --------------.
(Insulator)
14. A. C. even-------------voltage has been fatal. D.C. even 140v. have not cause death.
(18 v)
15. Ultra violet and Nuclear radiation ---------insulation.
(Degrade)
16. A. C. produces ventricular fibrillation in every cycle whereas D.C. produces -------
(Only one)
17. Lightning is a massive natural discharge of -------------.
(Static electricity)
18. Lightning discharges with high ---------------, high ----------------.
(Potentials, current)
19. Persons in boat or open field are easy targets of ------------attack.
(Lightning)
20. Standing under the trees ---------the hazards during lightening.
(Increases)
21. ----------------- is the sudden and accidental stimulation of the body nerves system by electric current.
(Electric shock)
22. Death from electric shock is -------------
(Instantaneous)
23. ----------- color wire is used for earthing.
(Green)
24. Three pins used in single phase plugs are to contact-----------,---------,----------- .
(Phase, Neutral, Earth)
25. The metallic part of the electrical equipment should be always-----------.
(Earthed)
26. Double -------------is always necessary for medium/high voltage electrical equipment.
(Earthing)
27. Earth resistance should be maintained as----------as possible.
(Low)
28. Earth resistance is maintained low with the help of -----------,----------,--------- .
(Sand, charcoal, Salt)
29. We can not use water tap for --------------.
(Earthing)
30. A sign of injury in case of electric shock is always visible.
(False)
31. Electric charges are present in air even when there is no thunder or lightning.
(True)
32. Wire used for temporary wiring should be---------------.
(Flexible)
33. Electric wires that are insulated will not cause injury if they touch trees.
(False)
34. It is very correct to take shelter during a rain under a tree that has over head line above it.
(False)
35. Home aerials are not dangerous at all.
(False)
36. Electric lighters for lighting gas burners should have plastic housing.
(False)
37. Old house wiring can be neglected when installing new wires.
(False)
38. Refrigerators are a source of electric shock.
(True)
39. Asphyxiation can be caused by electric shock.
(True)
40. The back of the hand is more sensitive to electricity.
(True)
41. The voltage that causes death is the same as the voltage existing as a power with which the person has come in contact.
(False)
42. Death due to electric shock can be prevented by rational operation of equipment.
(True)
43. Death from welding potentials of 65 v is not common.
(False)
44. It is possible to have a potential between a tap and the floor if there is a leak.
(True)
45. Floors covered with plastic tiles or linoleum can produce static charges as body.
(True)
46. A person with static charges will get a shock on touching a metal tap.
(True)
47. Many causes of electrical shock are due to electric current passing from palm of the hand to the feet or from palm to palm.
(True)
48. The neck, temples, back and shoulders are very vulnerable to electric current.
(True)
49. Death due to electric shock can take place even after 30 minutes after the person receives the shock.
(True)
50. At high voltages, injuries caused are usually burns caused by arcing.
(True)
51. A person who is aware that he may get shock has bigger chances of survival than who is not aware.
(True)
52. Electric injury to animals is common in the open air or unheated burns.
(True)
53. Animal is a good conductor and will aid the passage of electric current.
(False)
54. Even medical instruments without earthing can cause electric shocks.
(True)
55. A metal bed is recommended when taking ECG of a person.
(False)
56. It is easier to kill a person with electricity than for him to die accidentally due to electric shock.
(False)
57. It is impossible to name a safe value of current or voltage.
(True)
58. In an electric circuit man is a special type of conductor.
(True)
59. Electric shock can create severe burn.
(True)
60. Animals are more resistant to death due to electric shock than man.
(True)
61. Certain people have a greater sensitivity to even weak current.
(Yes)
62. Electric shock can cause death due to injury to the cardiovascular system.
(True)
63. It is till not known which system is first injured in case of electric shock (i.e.) heart brain, respiration or central nervous system.
(True)
64. Simultaneous disturbance of cardiac activity and stoppage of respiration is not possible in an electric shock.
(False)
65. When a person becomes part of an electric circuit, there is also absorption of electric energy.
66. Extension card can be a permanent type of wiring.
(False)
67. Extension cards should be attached to walls by nail.
(False)
68. Large kitchen appliance should be operated without vibration.
(True)
69. A switched off appliance can cause electrocution if unplugged.
(True)
70. It is advisable to use portable heaters in a bathroom.
(False)
71. All hoods for lamps should be able to trap heat.
(True)
72. Power tools should have only three-pin plug with a good earth.
(True)
73. A radio in use can give shock even if unplugged.
(True)
74. Some good equipment can give shock if thee polarity of the plug is reversed.
(True)
75. Air should circulate freely around TVs.
(True)
76. A ground fault circuit interrupter will prevent electrocution.
(True)
77. It is good to check often whether the circuit breakers are in working condition.
(True)
78. Faulty equipment operates erratically.
(True)
79. Heaters should be on stable surface and not closed to curtains.
(True)
80. Damaging in wiring is not dangerous.
(False)
81. If a switch warms up when a appliance is in use, then it is dangerous.
(True)
82. Over loading of power cable is permitted by about 10%
(False)
83. It is better to have appliances with a label of a recognized testing agency.
(True)
84. Fuses need not be use for portable electrical equipment.
(False)
85. An automobile spark plug can be dangerous if touched when engine running.
(True)
86. A car’s lighting circuit is extremely safe and is never dangerous.
(False)
87. We can use too many plugs in one socket to save money.
(False)
88. To avoid plug we can insert bare wire inside socket.
(False)
89. For 5 Amps. Fuse we can use 3mm. Thick wire.
(False)
90. Material used for fuse wire is -------------------.
(Tinned copper)
91. Material used for fuse carrier generally is -------------.
(Porcelain)
92. Color of the electrical hand gloves is -------------.
(Red)
93. Color of the electrical helmet is -----------------.
(White with the letter ‘E’)
94. While working at height, electricians should wear------------.
(Safety belt)
95. Double insulation consists of --------------, ------------.
(Functional insulation, Protective insulation)
96. An electric line is considered to be hot unless it is grounded.
(True)
97. What is the first step to rescue the person who is getting shock-----------
(Switch off the supply)
98. --------------- is used to test whether he circuit is live or dead.
(Test lamp)
99. The expansion of T.N.E.B. is-----------------.
(Tamil nadu Electricity Board)
100. The expansion of I.E.R. is -----------.
(Indian Electricity Rule)
(230 v)
2. Two lines used in single-phase supply are--------------, ---------------.
(Phase, Neutral)
3. Switches must be connected in-----------line.
(Phase)
4. The nature of supply from battery cell is-------------voltage.
(DC)
5. Emergency light glows when mains supply-----------.
(Fails)
6. The frequency of our electric supply is -------------Hz.
(50Hz)
7. The earth in electric circuit is ------------.
(Low resistance electric path)
8. Earth resistance can be measured by----------------.
(Megger)
9. The unit of resistance is ----------
(Ohms)
10. Fuse ----------the electric circuit /equipment/user when abnormal flow of electric supply is there.
(Protects)
11. Shock will occur when we come into contact with-----------,----------,------------.
(Phase and neutral (or) Phase and earth (or) Phase to phase)
12. The insulator is --------------for electricity.
(Non-conductor)
13. Porcelain is an example for --------------.
(Insulator)
14. A. C. even-------------voltage has been fatal. D.C. even 140v. have not cause death.
(18 v)
15. Ultra violet and Nuclear radiation ---------insulation.
(Degrade)
16. A. C. produces ventricular fibrillation in every cycle whereas D.C. produces -------
(Only one)
17. Lightning is a massive natural discharge of -------------.
(Static electricity)
18. Lightning discharges with high ---------------, high ----------------.
(Potentials, current)
19. Persons in boat or open field are easy targets of ------------attack.
(Lightning)
20. Standing under the trees ---------the hazards during lightening.
(Increases)
21. ----------------- is the sudden and accidental stimulation of the body nerves system by electric current.
(Electric shock)
22. Death from electric shock is -------------
(Instantaneous)
23. ----------- color wire is used for earthing.
(Green)
24. Three pins used in single phase plugs are to contact-----------,---------,----------- .
(Phase, Neutral, Earth)
25. The metallic part of the electrical equipment should be always-----------.
(Earthed)
26. Double -------------is always necessary for medium/high voltage electrical equipment.
(Earthing)
27. Earth resistance should be maintained as----------as possible.
(Low)
28. Earth resistance is maintained low with the help of -----------,----------,--------- .
(Sand, charcoal, Salt)
29. We can not use water tap for --------------.
(Earthing)
30. A sign of injury in case of electric shock is always visible.
(False)
31. Electric charges are present in air even when there is no thunder or lightning.
(True)
32. Wire used for temporary wiring should be---------------.
(Flexible)
33. Electric wires that are insulated will not cause injury if they touch trees.
(False)
34. It is very correct to take shelter during a rain under a tree that has over head line above it.
(False)
35. Home aerials are not dangerous at all.
(False)
36. Electric lighters for lighting gas burners should have plastic housing.
(False)
37. Old house wiring can be neglected when installing new wires.
(False)
38. Refrigerators are a source of electric shock.
(True)
39. Asphyxiation can be caused by electric shock.
(True)
40. The back of the hand is more sensitive to electricity.
(True)
41. The voltage that causes death is the same as the voltage existing as a power with which the person has come in contact.
(False)
42. Death due to electric shock can be prevented by rational operation of equipment.
(True)
43. Death from welding potentials of 65 v is not common.
(False)
44. It is possible to have a potential between a tap and the floor if there is a leak.
(True)
45. Floors covered with plastic tiles or linoleum can produce static charges as body.
(True)
46. A person with static charges will get a shock on touching a metal tap.
(True)
47. Many causes of electrical shock are due to electric current passing from palm of the hand to the feet or from palm to palm.
(True)
48. The neck, temples, back and shoulders are very vulnerable to electric current.
(True)
49. Death due to electric shock can take place even after 30 minutes after the person receives the shock.
(True)
50. At high voltages, injuries caused are usually burns caused by arcing.
(True)
51. A person who is aware that he may get shock has bigger chances of survival than who is not aware.
(True)
52. Electric injury to animals is common in the open air or unheated burns.
(True)
53. Animal is a good conductor and will aid the passage of electric current.
(False)
54. Even medical instruments without earthing can cause electric shocks.
(True)
55. A metal bed is recommended when taking ECG of a person.
(False)
56. It is easier to kill a person with electricity than for him to die accidentally due to electric shock.
(False)
57. It is impossible to name a safe value of current or voltage.
(True)
58. In an electric circuit man is a special type of conductor.
(True)
59. Electric shock can create severe burn.
(True)
60. Animals are more resistant to death due to electric shock than man.
(True)
61. Certain people have a greater sensitivity to even weak current.
(Yes)
62. Electric shock can cause death due to injury to the cardiovascular system.
(True)
63. It is till not known which system is first injured in case of electric shock (i.e.) heart brain, respiration or central nervous system.
(True)
64. Simultaneous disturbance of cardiac activity and stoppage of respiration is not possible in an electric shock.
(False)
65. When a person becomes part of an electric circuit, there is also absorption of electric energy.
66. Extension card can be a permanent type of wiring.
(False)
67. Extension cards should be attached to walls by nail.
(False)
68. Large kitchen appliance should be operated without vibration.
(True)
69. A switched off appliance can cause electrocution if unplugged.
(True)
70. It is advisable to use portable heaters in a bathroom.
(False)
71. All hoods for lamps should be able to trap heat.
(True)
72. Power tools should have only three-pin plug with a good earth.
(True)
73. A radio in use can give shock even if unplugged.
(True)
74. Some good equipment can give shock if thee polarity of the plug is reversed.
(True)
75. Air should circulate freely around TVs.
(True)
76. A ground fault circuit interrupter will prevent electrocution.
(True)
77. It is good to check often whether the circuit breakers are in working condition.
(True)
78. Faulty equipment operates erratically.
(True)
79. Heaters should be on stable surface and not closed to curtains.
(True)
80. Damaging in wiring is not dangerous.
(False)
81. If a switch warms up when a appliance is in use, then it is dangerous.
(True)
82. Over loading of power cable is permitted by about 10%
(False)
83. It is better to have appliances with a label of a recognized testing agency.
(True)
84. Fuses need not be use for portable electrical equipment.
(False)
85. An automobile spark plug can be dangerous if touched when engine running.
(True)
86. A car’s lighting circuit is extremely safe and is never dangerous.
(False)
87. We can use too many plugs in one socket to save money.
(False)
88. To avoid plug we can insert bare wire inside socket.
(False)
89. For 5 Amps. Fuse we can use 3mm. Thick wire.
(False)
90. Material used for fuse wire is -------------------.
(Tinned copper)
91. Material used for fuse carrier generally is -------------.
(Porcelain)
92. Color of the electrical hand gloves is -------------.
(Red)
93. Color of the electrical helmet is -----------------.
(White with the letter ‘E’)
94. While working at height, electricians should wear------------.
(Safety belt)
95. Double insulation consists of --------------, ------------.
(Functional insulation, Protective insulation)
96. An electric line is considered to be hot unless it is grounded.
(True)
97. What is the first step to rescue the person who is getting shock-----------
(Switch off the supply)
98. --------------- is used to test whether he circuit is live or dead.
(Test lamp)
99. The expansion of T.N.E.B. is-----------------.
(Tamil nadu Electricity Board)
100. The expansion of I.E.R. is -----------.
(Indian Electricity Rule)
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