Module-5 UG-Cable (2nd)

 146 : Which is the outer layer of an under ground cable?

A : Armour
B : Lead sheath
C : Serving
D : Bedding

147 : Which material is used for metallic sheathing in underground cable?
A : Copper
B : Aluminium
C : Nichrome
D : Lead

148 : Which material is used for armouring of underground cable?
A : Galvanised steel
B : Copper
C : Cast iron
D : CRGO steel

149 : Which conductor material is used for under ground cable?
A : ACSR
B : Aluminium
C : Steel
D : Nichrome

150 : What is the function of armouring in under ground cable?
A : To avoid mechanical injury to cable
B : To prevent entry of moisture
C : To protect the metallic sheath
D : To provide flexibility to cable

151 : Why stranded conductors are used in underground cable?
A : To provide flexibility
B : To reduce conductivity
C : To provide mechanical strength
D : To reduce the weight

152 : Which is the property of insulating materials used in under ground cable?
A : Hygroscopic
B : High insulation resistance
C : Low mechanical strength
D : High conductivity

153 : Which type of insulation is also known as empire type?
A : Impregnated paper
B : Varnished cambric
C : Polyvinyl Chloride
D : Rubber

154 : What is the drawback of rubber insulation used in under ground cable ?
A : Absorbs moisture
B : Hard
C : Low mechanical strength
D : High hygroscopic

155 : What is the advantage of Vulcanised Indian Rubber ?
A : Safe temperature is high
B : Hygroscopic
C : Greater mechanical strength
D : High conductivity

156 : What is the voltage rating of Super tension cables ?
A : up to 1100 V
B : up to 11000 V
C : 22 kV to 33 kV
D : beyond 132 kV

157 : What is the voltage rating of Extra super voltage cables ?
A : beyond 132 kV
B : up to 11000 V
C : 22 kV to 33 kV
D : up to 1100 V

158 : Which is the classification of underground cable according to their insulation system?
A : Single core cable
B : XLPE cable
C : Low tension cable
D : Super tension cable

159 : What is the full form of MI cables ?
A : Metal Insulated cables
B : Mineral Insulated cables
C : Mineral Inserted cables
D : Metal Inserted cables

160 : How many cores are in a three and half core under ground cable ?
A : Three
B : Four
C : Two
D : Five

161 : Which type of cable is used if the operating voltage is greater than 66 KV ?
A : Belted cables
B : Screened cables
C : H type cable
D : Pressure cables

162 : Which are the types of pressure cables ?
A : Oil filled and gas pressure cables
B : Belted cables and screened cables
C : H type and SL type cables
D : H type and belted cables

163 : Which method of laying involves digging a trench in the ground and laying cable on a bedding of sand ?
A : Laying in ducts
B : Laying direct in ground
C : Laying on racks
D : Solid system of laying

164 : Which method of cable laying is used inside buildings and industrial plants?
A : Direct laying in ground
B : Laying in ducts
C : Laying on racks in air
D : solid system of laying

165 : What is the name of the cable laying method?
A : Laying into ducts
B : Laying direct in ground
C : Laying along building
D : Laying on racks in air

166 : What is the advantage of direct laying of underground cable ?
A : Simple and less costly
B : Easy extension of load
C : Alteration is easy
D : Easy fault location

167 : Which method of cable laying, The cable in protected by sand (or) layer of bricks?
A : Laying cables along building
B : Laying cables direct in grounds
C : Laying cables into ducts
D : Laying cables on racks in air

168 : What is the full form of PILC?
A : Paper impregrated lead sheathed cable
B : Paper insulated lead sheathed cables
C : Paper input lead sheathed cable
D : Polyvinyl impregrated lead sheathed cable

169 : What is the name of the U.G. cable joint?
A : Tee joint
B : Straight through sleeve joint
C : Epoxy straight joint
D : Tri-furcating end connection

170 : What is maximum voltage grade of U.G. cable straight sleeve joints can be made?
A : Up to 1.1 KV
B : Up to 3.3 KV
C : Up to 11.0 KV
D : Above 11 KV

171 : What is the use of Tri- furcating end connections?
A : To connect UG cables to AB switches etc.
B : To make straight through joints of UG cable
C : To make Tee joint of UG cable
D : To test the UG cable

172 : Which is the property of bituminous compound used for hot pouring cable joint?
A : Low electrical strength
B : High electrical strength
C : High resistance to moisture
D : Low viscosity

173 : Which is the common fault likely to occur in under ground cable?
A : Open circuit fault
B : Ground fault
C : Short circuit
D : Leakage fault

174 : Which test is used for locating ground and short circuit fault in UG cable?
A : Open circuit test
B : Short circuit test
C : Loop test
D : Ground test

175 : Which type of cable fault will occur, If the insulation between two conductors is faulty?
A : Ground fault
B : Open circuit fault
C : Short circuit fault
D : Leakage current fault

176 : Which cable fault is caused due to the flow of current from the core to the lead sheath?
A : Ground fault
B : Short circuit fault
C : Leakage current fault
D : Open circuit faul