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19. The following are connected in parallel circuit at home EXCEPT: *
A. Refrigerator
B. light bulbs
C. Electric stove
D. Christmas lights
20. The following are disadvantages of a series circuit EXCEPT: *
A. It is difficult to control the load individually.
B. It is difficult to identify the damaged light bulb in the circuit.
C. Since voltage is not equal for every load, not all loads will have the same brightness.
D. It is easy to install, repair and maintain the circuit.
FOR MODULE 9 21.What electrical safety device is automatically shuts down or cut off the current if there is short circuit or overloading in the circuit? *
A.Circuit breaker
B.ADC
C. Earth ground
D. Insulator
22.The plugging of several/many devices to an outlet or to an extension wire with multiple outlets refers to_____ *
A. earthing
B. double insulation
C. single insulation
D. octopus connection
23.What electrical conditions is described in octopus wiring and what will be its possible hazardous effect? *
A. Short circuit, producing heat and fire
B. Overloading, producing heat and causes fire
C. In appropriate wiring, producing extra current
D. Single insulator, causing heat
24. Which of the following is NOT considered as safety practice of appliances at home? *
A. no overloading of appliances in the outlet
B. unplugging of appliances in the outlet when not in use
C. inappropriate /not proper size of wire is used in wiring connection.
D. electrical outlets and wires of appliances are free from damages or cracks
25.Which electrical device blows up and stops the flow of current when there is overloading in the circuit? *
A. fuse
B. circuit breaker
C. switch
D. earth ground
26.The electrical safety device that directs any excess current in the metal casing of appliances to the ground refers to_____________ *
A. fuse
B.electric sockets
C. earthing/earth ground
D.circuit breaker
27. What will happen when wires in a circuit with defective rubber insulation or open wires touch each other? *
A. electrical outlet will not function
B. will lead to octopus wiring
C. short circuit may occur that leads to fire
D. none of the above
28. What is the purpose of earthing ? *
A. To reduce the resistance of the appliance
B. To prevent short circuit
C. To cut the circuit in case of overloading
D. To provide alternative route of upsurge current in case of grounded circuit.
29.Which of the following should be done to prevent electrical shock at home ? *
A. Recycle blown up fuse
B. Regularly check household wirings
C. Plug electrical appliances with wet hand
D. Continue using worn-out extension wire
30. Which of the following describe/s the fuse? *
A. It is made up of metal ribbon that will heat up and melt if the current exceeds its current rating.
B. Once it is blown out, it must be replaced with a new one after the source of overloading is determined and repaired.
C. It will blows up when there is overloading in the current.
D. All of the above​






ANSWER:
19.c
20.a
21.a
22.d
23.a
24.a
25.a
26.c
27.c
28.d
29.a
30.b

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Sagot :

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