3rd Year Lineman Tests Questions with 100% Correct Answers

A factor which necessitates the need for single-phase over three-phase oil switches Correct Answer High voltage clearance The "trip coil" is a device on an oil switch which will automatically open the Oil Circuit Recloser under a high current situation Correct Answer True The "trip coil" of an oil switch is series connected directly to a low voltage line Correct Answer True The method of controlling the sequence of operations of an Oil Circuit Recloser Correct Answer Hydraulic What device is used to permit the connection of an oil switch to a high voltage circuit Correct Answer Current transformer The "Oil Circuit Recloser" can distinguish a temporary from a permanent fault Correct Answer True The force which opens an OCR Correct Answer Magnetic The force which closes an OCR Correct Answer Spring The principle(s) behind the ability of an "oil switch" to break an arc Correct Answer The insulating ability of oil The oil will vaporize from an arc Vaporized oil will create a pressure The device which protects the fuse from a temporary fault Correct Answer Oil Circuit Breaker Under normal conditions it is a practice to permanently install a line fuse in series on the source side of an OCR Correct Answer False The advantage of an electronic oil circuit recloser Correct Answer Finer coordination The minimum trip current of an OCR is normally twice the normal load current rating Correct Answer True A term which expresses the selection of sectionalizing devices which will be so arranged that the smallest section of line will be isolated from the circuit Correct Answer Coordination The factor which affects the operation of a fuse Correct Answer Heat The sectionalizing device which protects the fuse from a temporary fault Correct Answer Oil Circuit Recloser The advantage of a vacuum recloser Correct Answer Outstanding dielectric strength Rapid recovery Short arcing time The value of current which will normally open an OCR Correct Answer 2 times normal load current rating The two fast operations of an OCR are for the purpose of protecting Correct Answer the fuse on the load side 7200 3-phase 3-wire The distribution system is Correct Answer delta 7200 3-phase 3-wire The system voltage is Correct Answer 7200 volt 7200 3-phase 3-wire The number of wires listed on the system above indicates the connection used at the substation Correct Answer True 7200 3-phase 3-wire The "system voltage" is considered as the- Correct Answer phase to phase value (12470GrdY/7200-120/240) 167 Kva The full high side coil voltage is- Correct Answer 7200 volt (12470GrdY/7200-120/240) 167 Kva The full low side coil voltage is - Correct Answer 240 volt (12470GrdY/7200-120/240) 167 Kva This transformer will have secondary internal connections Correct Answer False (12470GrdY/7200-120/240) 167 Kva This transformer is designed to be connected wye or delta on the high side Correct Answer False (/4160Y) The coil voltage on the high side is Correct Answer 67000 volt (/4160Y)