ELECTRICIAN 2nd YEAR MODULE – Control Panel Wiring ONLINE TEST July 2, 2025July 2, 2025 by admin TRANSLATE THIS QUIZ IN YOUR LANGUAGE इस प्रश्नोत्तरी का अपनी भाषा में अनुवाद करें <<12345678910111213141516171819202122232425262728293031323334353637>> 0% Question 1 of 37 1. What is the purpose of control transformer used in control panel wiring? To control the supply voltage to the contactor To maintain constant terminal voltage To supply the power to the auxiliary circuits To protect the control elements from over voltage faultQuestion 1 of 37Question 2 of 37 2. What is the name of the accessory used in control panel wiring? Nylon cable ties Wire ferrules Wire sleeves Cable binding strapQuestion 2 of 37Question 3 of 37 3. Which device is avoided in the panel board assembly? Isolating switch Sensors Push button switch Indicating lampQuestion 3 of 37Question 4 of 37 4. Which cable ties are used to bunch the wires? Cotton ties P.V.C ties Silk ties Nylon tiesQuestion 4 of 37Question 5 of 37 5. How should control circuit voltage and power in a contactor be selected? As per the type of supply As per supply voltage As per no volt coil rating As per rated currentQuestion 5 of 37Question 6 of 37 6. What is the function of limit switch in control panel wiring? Controls machine from over speed Controls machine from over heat Controls distance movement of any machine Controls machine from over loadingQuestion 6 of 37Question 7 of 37 7. Which DC load is represented by the DC4 standard duty cycle of contactors? Resistive loads except motor loads Starting and stopping of series motor Starting and stopping of shunt motor Starting and stopping with inching and brakingQuestion 7 of 37Question 8 of 37 8. What is the name of the device marked as 'X'? Main contact Start button Stop button Auxiliary contactQuestion 8 of 37Question 9 of 37 9. What is the name of the accessory used in control panel wiring? Terminal connector Lugs Grommet ThimbleQuestion 9 of 37Question 10 of 37 10. Which accessory is used to mount MCB, OLR in the panel board without using screws? G. channel PVC channel Grommets DIN RailQuestion 10 of 37Question 11 of 37 11. Which material is used to make open frame bimetallic adjustable thermostat contacts? Copper Brass Bronze SilverQuestion 11 of 37Question 12 of 37 12. What essential feature to be considered while designing a layout of control panel? Proper type of protection and measuring system Suitable method of labelling and cable harnessing Inside area and number of indicating lights in front panel Outside dimensions and swing area of cabinet doorQuestion 12 of 37Question 13 of 37 13. What is the name of the device marked as 'X' in the circuit? Contactor Stop button Over load relay trip No volt coilQuestion 13 of 37Question 14 of 37 14. What is the reason for providing two separate Earthings in panel board? Control the stray field in the panel Panel board is made in metal box Ensure one earthing in case of other failure Reduce the voltage drop in panel boardQuestion 14 of 37Question 15 of 37 15. Which is the correct sequence operation of contactors for operating automatic star-delta starter? Main→Star→Delta→Timer Main→Timer→Delta→Star Star→Main→Timer→Delta Star→Timer→Main→DeltaQuestion 15 of 37Question 16 of 37 16. Which switch with an actuator is operated by the motion of a machine or part of an object? Push button switch Toggle switch Limit switch Isolating switchQuestion 16 of 37Question 17 of 37 17. Which supply is indicated by the color of conductor exhibited on Red, Blue and Black? Supply AC system 3 phase Supply DC 3 wire system Apparatus AC system 3 phase Single phase AC systemQuestion 17 of 37Question 18 of 37 18. What is the purpose of DIN-rail used in control panel wiring? It provides a pathway for electrical wiring Mounting the control accessories without screws Mounting the double deck terminal connectors Install the high powered circuit accessoriesQuestion 18 of 37Question 19 of 37 19. How are the contacts in a contactor engaged for working? By manual operation By operating electromagnet to change the position By using bimetallic strip to change the position By mechanical settingsQuestion 19 of 37Question 20 of 37 20. Why the motor is not changing the direction, if reverse push button is pressed in forward and reverse control star delta starter? No voltage exist in reverse contactor Fault in forward contactor No volt coil is not energized Due to interlock in reverse contactorQuestion 20 of 37Question 21 of 37 21. What is the name of the wiring accessory used in control panel wiring? Race ways G channel DIN rails GrommetsQuestion 21 of 37Question 22 of 37 22. Which circuit uses limit switches? Lift circuits Domestic power circuits Motor control circuits Street lightingQuestion 22 of 37Question 23 of 37 23. What happens if time delay relay of an auto star-delta starter remains in closed condition after starting? Starts and stop Runs in delta only Runs normally Runs in star onlyQuestion 23 of 37Question 24 of 37 24. Which device prevents flare out of stripped and stranded cables in the panel board? Sleeves Wire ferrules Cable binding straps and button Lugs and thimblesQuestion 24 of 37Question 25 of 37 25. What is the criteria to select the contactor? Place of use the contactor Type of load connected Type of supply Supply voltage and loadQuestion 25 of 37Question 26 of 37 26. Which switch is operated at OFF load condition? Limit switch Two way switch Isolating switch Push button switchQuestion 26 of 37Question 27 of 37 27. What is the purpose of thermal overload relay in control panel? Switching ON/OFF the circuit Protect the motor from over heating and loading Control the circuit based on time delay Protect the circuit from earth faultQuestion 27 of 37Question 28 of 37 28. Which is the standard duty cycle code of the contactor for starting and stopping the AC resistive and inductive load?AC2AC4AC1AC 3Question 28 of 37Question 29 of 37 29. Why are control panels provided with control transformer? To maintain rated main supply voltage To supply reduced voltage to power circuit To operate the auxiliary circuits To maintain rated voltage to loadQuestion 29 of 37Question 30 of 37 30. Which device protects from overload and short circuit in a panel board? Miniature circuit breaker Isolating switch Thermal overload relay Time delay relayQuestion 30 of 37Question 31 of 37 31. How to protect the cable from insects and rats into the panel? By using Grommets By providing nylon cable ties By using sleeve By using cable binding strapsQuestion 31 of 37Question 32 of 37 32. Why is sequential control of motors required in industrial applications? To share more loads To minimize the operating cost To reduce power consumption To increase the accuracy of operationQuestion 32 of 37Question 33 of 37 33. Why power and control wirings run in separate race ways? To reduce the radio interference To increase the insulation resistance To reduce heat To increase the current carrying capacityQuestion 33 of 37Question 34 of 37 34. Which type of device protects motors from over heating and over loading in a panel board? Thermal relay Electro mechanical relay Rectifier Limit switchQuestion 34 of 37Question 35 of 37 35. What is the use of PVC channel in a control panel wiring? Mounting relays Mounting double deck terminal contactor Mounting MCB Pathway for electrical wiring and protectionQuestion 35 of 37Question 36 of 37 36. Which device controls the operations in sequential control systems? Timer Relays Control transformer ContactorQuestion 36 of 37Question 37 of 37 37. What is the use of 'G' channels in control panel? For fixing relays For fixing instruments For fixing terminal connectors For fixing contactorsQuestion 37 of 37 Loading...