zero One TWO Man 20. What happens when one light bulb in a series circuit burns out. A. The rest of the bulbs continue to work B. Nothing will happen C. The rest of the bulbs become dim D. It breaks the circuit 21. It is a circuit in which there are several path for the current. A. Series B. Open C. Parallel D. Closed 22. What happens to the total resistance of the resistors in no.8, if they were connected in parallel instead? A. increases C. decreases B. remains the same D. increases then decreases 23. Two resistors (110 Q, 115 0) are connected in parallel with a 220-V supply. What is the total voltage? A. 55 V C. 220 V D. 330 V B. 110 V 24. Three resistors (20 Q, 30 Q, 60 Q) are connected in series. What is the equivalent resistance of the combination? A. 10 Q Β. 60 Ω C. 110 Ω D. 220 Q 25. Supposed that the battery has a voltage of 9.0 V and the lamps resistances R1, R2, and R3 are 6.0, 4.0 and 2.0 02 respectively. R₁ R₂ R3 What is the total equivalent resistance of these resistances in series 26. What is the total resistance of the figure at the right? Β. 17 Ω C. 23 Ω 30 40 50 A. 12 Q D. 60 Q www For numbers 32-35, refer to the figure on the right: 27. What is the total resistance? A. 18.00 Q B. 0.23 0 C.4.44 Ω D. 0.13 0 28. What is the total current? R₁ * 80 C. 0.37 A D. 0.73 A A. 2.70 A 29. What is the current in R₁? A. 1.2 A C. 1.8 A 30. What is the voltage in R₁? A. 12 V B. 7.20 A B. 1.5 A B. 6 V C. 4 V D. 2.7 A D. 2 V 12 V- R₂ = 10 0
Protection System
A system that protects electrical systems from faults by isolating the problematic part from the remainder of the system, preventing power from being cut from healthy elements, improving system dependability and efficiency is the protection system. Protection devices are the equipment that are utilized to implement the protection system.
Predictive Maintenance System
Predictive maintenance technologies are designed to assist in determining the state of in-service equipment so that maintenance can be scheduled. Predictive maintenance is the application of information; proactive maintenance approaches examine the condition of equipment and anticipate when it should maintain. The purpose of predictive maintenance is to forecast when equipment will fail (depending on a variety of parameters), then prevent the failure through routine and corrective maintenance.Condition monitoring is the continual monitoring of machines during process conditions to maintain optimal machine use, which is necessary for predictive maintenance. There are three types of condition monitoring: online, periodic, and remote. Finally, remote condition monitoring allows the equipment observed from a small place and data supplied for analysis.
Preventive Maintenance System
To maintain the equipment and materials on a regular basis in order to maintain those running conditions and reduce unnecessary shutdowns due to unexpected equipment failure is called Preventive Maintenance (PM).
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