OBJECTIVE –QUESTIONS ON TRD (PART - 6 )
251. Magnetic poles are generally known as -------------------------------. a) North- South b) East- West c) EMF- MMF d) UP-DOWN
252. Which one is incorrect to natural magnet? a) Loss of magnetic properties on heating. b) Similar poles repeal and opposite attract each other. c) A magnet attracts all metals. d) Small pieces of a magnet shall also be a magnet.
253. When current is flown through the wire, wound on a iron piece ,the iron piece becomes- a) Natural Magnet b) Electro-Magnet c) Steel d) Mild Steel.
254. How a Electromagnet differs from a Natural Magnet? a) Number of poles may be arbitrarily chosen. b) Magnetic line of force is reversed. c) Strength of poles depends on size of magnet d) Temporary Magnetism.
255. Electromagnetism is not used in -------------------------------------------- a) Compressor motor contactor. b) Battery charger. c) 42 KV LA d) Taret CT
256. -------------------------- Works on principle of electromagnetism. a) LA b) Capacitor c) CB d) AT
257. The lowest category of insulating materials as per thermal classification is ---------.
258. According to thermal classification of insulating materials category Y materials are suitable for temperature limit -------------. a) 0ºC b) 180ºC c) 90ºC d) 270ºC
259. The highest category of insulating materials as per thermal classification is ---------.
260. According to thermal classification of insulating materials category Y materials are suitable for temperature limit -------------. a) Above 0ºC, up to 80ºC b) Above 0ºC, up to 90ºC c) Up to 150ºC d) Above180ºC
261. The vital component of a rectifier circuit is? a) Resistor b) Diod c) Capacitor d) Chock Coil
262. Normally generation of electrical energy is done in ------ phases. a) 1 b) 2 c) 3 d) 4
263. ACTM has relation with? a) Maintenance of TRD installations. b) Directives for different departments in electrified section. c) Working of TPC d) All of the above.
264. Direction of electric current flow is – a) From high voltage to low voltage. b) Low voltage to high voltage. c) Between two points that’s voltage is same. d) There is no such rule.
265. Whenever OHE voltage goes down to ------ KV or less, the TPC gets catenary indication.
266. Tests that can be done by the same measuring equipment – a) PI / IR b) BDV / DGA c) THRC / IR d) PPM / DGA
267. What do you mean by unit consumed in connection with Electric Meter Reading? a) KVA b) KVAR c) KWH d) KA
268. What do you mean by Range in context with Megger ? a) Max value of MΩ on scale. b) Voltage. c) RPM of rotating handle. d) Initial value of MΩ on scale.
269. Identify the symbol of Infinity. a) MΩ b) & c) ∞ d) °C
270. TR-1 is given to ------------------------.
271. Competency Certificate given to OHE Lines Man is -----------------------.
272. TR-5 Competency Certificate is given to – a) OHE Lines Man b) PSI fitter c) RC artisan d) PSI Supervisor.
273. According to TR-2 a Lines Man is not authorized for- a) Work on OHE. b) 25KV isolator operation. c) Switching operation in Switching Station despite of permission granted by TPC. d) Commissioning of new installations.
274. TR-5 permits a PSI artisan for – a) Issuing PTW. b) Receiving PTW of EHV lines c) Commissioning of new installations. d) Shutting down 25KV installations according to instructions of TPC.
275. Which method of safety is generally not adopted during power block on a SubSector? a) PTW b) Prohibition of AC engines to enter in power block section. c) To tripe Feeder CB. d) Application of Discharge Rods.
276. Skilled Artisan of Remote Control is given the Competency Certificate TR----------.
277. Maximum Permissible distance between two discharge rods is? a) 1 meter b) 10 meter c) 100 meter d) 1000 meter.
278. What care should be considered while clamping a discharge rod on a mast? 1. Cable and lug connection. 2. Availability of discharge rod on both sides of the spot. 3. Availability of Structure bond. 4. Distance between consecutive discharges rods. a) 1, 2 b) 2, 3 c) 2, 4 d) all of the above.
279. Ohm’s law states the relation among Voltage, Current & Resistance. (True/False)
280. Resistance of a wire increases with increase in its length. (True/False)
281. Resistance of a wire decreases with increase in its length. (True/False)
282. The resistance of a wire decrease with increase of its thickness. (True/False)
283. The resistance of a wire increases with increase of its thickness. (True/False)
284. Resistance of conductors increase with temperature. (True/False)
285. Resistance of conductors decreases with increase in temperature. (True/False)
286. Resistance of insulating materials increases with temperature. (True/False)
287. Resistance of insulating materials decreases with increase in temperature. (True/False)
288. Resistance of conducting materials varies according to temperature. (True/False)
289. Conversion of AC supply into DC is possible, but the reverse is not. (True/False)
290. Value of Insulation Resistance is independent of temperature. (True/False)
291. Insulation Resistance decreases with increase of temperature. (True/False)
292. Electrical Clearance and Working clearance are the two different name of the same vary fact. (True/False)
293. The drawing called as Plan, depicts all the three dimensions (Length,Width,Height) of the object. (True/False)
294. The poles of a magnet can simply be made separated by cutting the magnet into pieces. (True/False)
295. A magnet shall always have two poles. (True/False)
296. Insulating properties of insulating materials get affected by temperature; therefore, these have been classified into temperature groups. (True/False)
297. Selection of megger shall be done according to rated voltage of the winding under IR test. (True/False)
298. Winding Resistance and insulation resistance are two different names of the same vary fact. (True/False)
299. For safety considerations the distance between two discharge rods should not be more than 1 KM.
300. Discharge Rod should be clamped on that mast only which is having structure bond connected. (True/False)
284. Resistance of conductors increase with temperature. (True/False)
285. Resistance of conductors decreases with increase in temperature. (True/False)
286. Resistance of insulating materials increases with temperature. (True/False)
287. Resistance of insulating materials decreases with increase in temperature. (True/False)
288. Resistance of conducting materials varies according to temperature. (True/False)
289. Conversion of AC supply into DC is possible, but the reverse is not. (True/False)
290. Value of Insulation Resistance is independent of temperature. (True/False)
291. Insulation Resistance decreases with increase of temperature. (True/False)
292. Electrical Clearance and Working clearance are the two different name of the same vary fact. (True/False)
293. The drawing called as Plan, depicts all the three dimensions (Length,Width,Height) of the object. (True/False)
294. The poles of a magnet can simply be made separated by cutting the magnet into pieces. (True/False)
295. A magnet shall always have two poles. (True/False)
296. Insulating properties of insulating materials get affected by temperature; therefore, these have been classified into temperature groups. (True/False)
297. Selection of megger shall be done according to rated voltage of the winding under IR test. (True/False)
298. Winding Resistance and insulation resistance are two different names of the same vary fact. (True/False)
299. For safety considerations the distance between two discharge rods should not be more than 1 KM.
300. Discharge Rod should be clamped on that mast only which is having structure bond connected. (True/False)
ANSWER – OBJECTIVE QUESTION ON TRD
251. a 252. c 253. b 254. d 255. c 256. d 257. Y 258. c 259. C 260. d 261. b 262. c 263. d 264. a 265. 19 266. a 267. c 268. b 269. c 270. Khalasi 271. TR-2 272. b 273. d 274. c 275. c 276. TR-7 277. d 278. d 279. True 280. True 281. False 282. True 283. False 284. True 285. False 286. False 287. True 288. True 289. False 290. False 291. True 292. False 293. False 294. False 295. True 296. True 297. True 298. False 299. True 300. True
301. A combination of cells shall be called as ------------------------------.
302. Cell voltage of a lead –acid cell is ----------------------.
303. Electric cell converts ------------------- energy into electrical energy.
304. Supply available from a electric cell is ---------------------- ( AC or DC)
305. Basically a battery charger is a ------------------------------- circuit.
306. The cell voltage of a fully charged Leas-Acid cell is ------------------------.
307. A Lead-Acid cell shall be said fully discharged when its voltage drops down to -------
308. Electrolyte of a Lead –Acid Cell is prepared from Sulfuric Acid and --------------------.
309. Electrolyte of a Lead –Acid Cell is prepared from Distilled Water and ------------------.
310. The SPG of electrolyte of fully charged lead-acid cell is ------------------------------.
311. A Lead-Acid cell shall be said as fully discharged when SPG of its electrolyte drops down to ------------------------.
312. Unit to indicate battery capacity is ----------------------.
313. The battery----------- increases if the cells are connected in series. (Voltage, Capacity)
314. The Battery ---------- increase if the cells are connected in parallel.(Voltage, Capacity)
315. The battery ----------- depends upon its size.(Voltage, Capacity)
316. General maintenance of a battery set is done at an interval of ------------ days.
317. As a temperature correction -------- shall be added or deducted from the SPG readings of electrolyte taken from hydrometer for per degree temperature variations.
318. The reference temperature for Temperature Corrections in SPG readings of electrolyte is --------------.
319. What shall generally be added to maintain the level of electrolyte in a cell? (electrolyte, distilled water, acid)
320. To keep a battery set at very low charging rate is called as? (Boost Charging, Trickle Charging)
321. To charge a battery set at very high rate for a short period is called as? (Boost Charging, Trickle Charging)
322. To prepare electrolyte which type of pot is suitable? (Stain less Steel, Glass or Porcelain, Cupper)
323. The white aggregate appearing on the terminals of a battery is called as ----------------.
324. Sulfation is a indicator of -------------- health of the battery. (Good, Bad)
325. The SPG of electrolyte -------------- when the battery gets charge. (Increase, Decrease)
326. The SPG of electrolyte ---------- when the battery gets discharge. (Increase, Decrease)
327. Battery rating for a TSS is ------------AH.
328. Battery rating for a SSP is ------------AH.
329. Battery rating for a SP is ------------AH.
330. ------------- is used for measurement of SPG of electrolyte.
331. SPG of distilled water is ? a) 1.000 b) 1.180 c) 1.220 d) 2.2
332. What is true for DC supply and distilled water? a) DC current can not flow through distilled water. b) DC current can flow through distilled water, c) DC current gets stored in distilled water. d) DC gets converted into AC.
333. What you expect from a battery kept on high charging rates for a long time? a) Nothing special. b) Plates may be damaged by getting very hot. c) Change of polarity d) Increased capacity.
334. Electrolyte bubbling heavily, it is a indication of? a) Over charging b) Under charging c) No load d) Discharged
335. What are the conditions for better performance of a battery set? 1. Equal cell voltages. 2. Equal AH 3. Equal SPG of Electrolyte. 4. Correct connection. a) 1, 4 b) 3, 4 c) 1, 2, 3 d) all of the above.
336. What is incorrect for a 40AH capacity battery? a) 1 ampere for 40 hours b) 40 ampere for 1 hours c) 4 ampere for 10 hours d) A rate of current supply as 40 ampere per hour.
337. All types of cells can be used repeatedly by repeated charging.(True/False)
338. Primary cells can not be recharged after getting discharged. (True/False)
339. Secondary cells can not be recharged after getting discharged. .(True/False)
340. DC supply source is required for charging a cell. .(True/False)
341. A cell can be charged through AC supply. .(True/False)
342. Electrolyte is an example of insulating material. .(True/False)
343. Electrolyte is an example of conducting material. .(True/False)
344. The Electrolyte of Lead-Acid battery is of acidic nature. .(True/False)
345. The Electrolyte of Lead –Acid Battery is of basic nature. .(True/False)
346. Distilled water is of Neutral Nature. .(True/False)
347. To prepare the electrolyte one part sulfuric acid is mixed with three or four part of distilled water. .(True/False)
348. To prepare the electrolyte one part sulfuric acid is mixed with three or four part of ordinary water. .(True/False)
349. Battery capacity may be stated as KW. (True/ False)
350. The voltage increases and the capacity remain constant, if the cells are connected in series. (True/ False)
ANSWER – OBJECTIVE QUESTION ON TRD
301. Battery 302. 2.2 volts 303. Chemical 304. DC 305. Rectifier 306. 2.2 volts 307. 1.8 volts 308. Distilled water 309. Sulfuric Acid 310. 1.220 311. 1.180 312. AH 313. Voltage 314. Capacity 315. Capacity 316. 15 317. 0.0007 318. 27°C 319. Distilled Water 320. Trickle 321. Boost Charging. 322. Glass or Porcelain 323. Sulfation 324. Bad 325. Increases 326. Decreases 327. 200 328. 40 329. 40 330. Hydrometer 331. 1.000 332. a 333. b 334. a 335. d 336. d 337. False 338. True 339. False 340. true 341. False 342. False 343. True 344. True 345. False 346. True 347. True 348. False 349. True 350. True
