Types of wiring objective type question and answers  ITI electrician

Types of wiring

Electrician 2nd semester Trade theory

  1. The type of wiring depends on ______________________
    1. Location and consumers budget
    2. Durability and cost
    3. Safety and appearance
    4. All of the above *
  2. The types of internal wiring used in domestic installations are ___________________
    1. Cleat wiring
    2. CTS / RTS wiring
    3. Metal / PVC conduit wiring
    4. All the above *
  3. _____________ type of wiring uses insulated cables supported in porcelain cleats
    1. Cleat *
    2. CTS/RTS
    3. Metal
    4. PVC conduit or PVC capping
  4. _________________________ wiring is recommended only for temporary installations
    1. Cleat *
    2. CTS/RTS
    3. Metal
    4. PVC conduit or PVC capping
  5. __________________ half of cleat pair is grooved to receive the wire
    1. Top
    2. Middle
    3. Bottom *
    4. All of these
  6. ___________________ half of the cleat pair is used to hold cable grip
    1. Top *
    2. Middle
    3. Bottom
    4. All of these
  7. ___________________ wiring is the cheapest among all types of internal wiring used for domestic installations
    1. Cleat *
    2. CTS/RTS
    3. Metal
    4. PVC conduit or PVC capping
  8. In cleat wiring. cleats shall be fixed at distances not greater than ____________ cm apart and at regular intervals
    1. 50
    2. 60 *
    3. 65
    4. 70

 

  1. Where cleated conductors cross each other, they shall be separated by an ___________________ which will rigidly maintain a distance.
    1. Wooden batten
    2. Insulated bridging piece *
    3. Clamps
    4. All the above
  2. Cleat wiring should be always above __________ from the floor level
    1. 5 m *
    2. 3 m
    3. 5 m
    4. 3 m
  3. To relieve the strain from the terminals of pendants, lamp holders and ceiling roses _____________ are used.
    1. Cord grip
    2. Underwriter’s knot
    3. Both a & b *
    4. None of these
  4. Cord grip and under writer’s knot are used in_____________
    1. Lamp holder’s terminals
    2. Ceiling roses
    3. Terminals of pendants
    4. All of these*
  5. In _____________________the phase or line conductor shall be looped at the switch box and neutral conductors at the point outlets
    1. Looping back method *
    2. Looping in method using 2 plate ceiling roses and switches
    3. Looping in method using 2 plate ceiling roses and switches
    4. Joint box method
  6. In the _______________________ method, wherever tapping must be taken from cable, joints are made
    1. Looping back method
    2. Looping in method using 2 plate ceiling roses and switches
    3. Looping in method using 2 plate ceiling roses and switches
    4. Joint box method *
  7. _________________________ cables are used suitable to run on teak wood battens
    1. TRS
    2. Tough Rubber Sheathed
    3. PVC sheathed
    4. All of these *
  8. _______________ wiring is used to draw TRS cables on Teak wood
    1. Cleat
    2. Batten *
    3. PVC
    4. All of these

 

 

  1. The intervals between wood plugs in batten wiring should at intervals not exceeding _____________________________ cm
    1. 60
    2. 65
    3. 70
    4. 75 *

 

  1. _______________ are used for firmly clipping the cables in position during batten wiring
    1. Knot
    2. Clamps
    3. Link cables *
    4. Cable tags
  2. Link clips are packed in card board boxes at the rate of ______________ link clips per box
    1. 200
    2. 300
    3. 100 *
    4. 500
  3. Link clips shall be so arranged that one single clip shall not hold more than two twin core TRS or PVC sheathed cables up to _______ sq. mm
    1. 3
    2. 0
    3. 6
    4. 5 *
  4. A bedroom may require one lamp at the dressing table controlled by a switch, and one lamp just above the bed which may require dual control by _____________
    1. 3 One way switch
    2. 1 Two-way switch
    3. 2- Two way switches *
    4. 3 Two way switches
  5. ________________________ switches may be used to provide bright or dim lights in the same circuit through a series or parallel connections found commonly in corridors and bedrooms of hostels, hospitals, railway compartments.
    1. One way centre OFF switch
    2. Two-way switch centre OFF switch *
    3. Both a and B
    4. None of these
  6. _________________ switch is incorporated in a circuit to keep the lamps in the OFF position irrespective of the position of the individual switches
    1. One way centre OFF
    2. Master OFF*
    3. Two- way centre off switch
    4. None of these

 

 

  1. When master ‘ON’ and ‘OFF ‘controls are incorporated together, the control is called _____________________
    1. One way centre OFF
    2. Master OFF
    3. Two- way centre off switch
    4. Variable master control
  2. Which is the most type of wirings used in domestic applications?
    1. Conduit wiring *
    2. Cleat wiring
    3. Batten wiring
    4. None of these
  3. When cables are drawn through the conduit and terminated at the outlet or switch points, the system of wiring is called _________________
    1. Conduit wiring *
    2. Cleat wiring
    3. Batten wiring
    4. None of these
  4. Which is not a type of conduit wiring?
    1. Rigid steel conduits
    2. Rigid non-metallic conduits
    3. Flexible conduits
    4. TRS wiring *
  5. Which type of conduit wiring is used for gas tight explosive proof installation?
    1. Heavy gauge screwed conduit*
    2. Light gauge conduit
    3. Both a & b
    4. None of these
  6. _______________________ conduit is the one commonly used in modern domestic commercial and industrial wirings?
    1. Seam welded conduit *
    2. Heavy gauge screwed conduit
    3. Light gauge conduit
    4. Both a & b
  7. _________________ is constructed from a length of flat thin sheet steel which is manufactured to form a tube?
    1. Heavy gauge screwed conduit
    2. Light gauge conduit*
    3. Both a & b
    4. None of these
  8. Which amongst the following is not a Nominal size of conduit in mm
    1. 20
    2. 25
    3. 38
    4. 50 *

 

 

 

  1. Non-metallic conduits are made of _____________
    1. Fibres
    2. Asbestos
    3. PVC
    4. All of above
  2. PVC conduits are available on ________ m length
    1. 2
    2. 4
    3. 3 *
    4. 5
  3. _________________ conduits are used for protecting cable ends connected to a vibrating machine inter connection between switch gear and distribution boards
    1. Rigid steel conduits
    2. Rigid non-metallic conduits
    3. Flexible conduits *
    4. TRS wiring
  4. ________________ conduit wiring system done on wall surfaces
    1. Surface *
    2. Concealed
    3. Recessed
    4. All the above
  5. __________________________ conduit wiring system done inside the concrete plaster or wall
    1. Surface *
    2. Concealed
    3. Recessed
    4. Both b & C
  6. Selection of the type of conduit depends upon the _______________
    1. Type of location, outdoor or indoor
    2. Type of atmosphere and estimated cost
    3. Expected working temperature & allowable weight of conduit runs
    4. All the above*
  7. ________________ are used where the conduits shall be pushed right through to the interior of the fittings
    1. Couplers*
    2. Elbow
    3. Bends
    4. Tees
  8. ____________________ types couplers are used in straight conduit runs to assit in the inspection of the cables
    1. Couplers*
    2. Elbow
    3. Bends
    4. Tees

 

  1. _________________ are used at sharp ends of nearby walls or roofs and wall
    1. Couplers
    2. Elbow*
    3. Bends
    4. Tees
  2. ________________ gives a diversion of 90 degree in the turn of a conduit
    1. Couplers
    2. Elbow
    3. Bends*
    4. Tees
  3. ______________ are used to take diversion from the main line either to the switch points at light points.
    1. Couplers
    2. Elbow
    3. Bends
    4. Tees *
  4. Small circular boxes shall be provided with two machine screws of a diameter not less than _________ mm for fixing the covers
    1. 8*
    2. 0
    3. 9
    4. 4
  5. Large circular boxes shall be provided with two machine screws of a diameter not less than _________ mm for fixing the covers
    1. 8
    2. 0
    3. 9
    4. 0 *
  6. The most common joining conduits with fitting uses _______________
    1. Gum
    2. Hacksaw frame
    3. Solvent adhesive *
    4. All the above
  7. PVC conduits not exceeding ____________ mm diameter can be bent cold by using a spring
    1. 50
    2. 30
    3. 25*
    4. 45
  8. Cold bending could be done using a __________
    1. Spring *
    2. Hack saw frame
    3. Hand
    4. Knee

 

 

 

  1. Factors to select the correct size of conduit depends on ___________
    1. Size of cables
    2. Number of cables to be drawn
    3. Both a & b *
    4. None of these
  2. When 2.5 sq. mm 640 V grade single core cables of six numbers are to be drawn in a single run, we can use ______________ non-metallic conduit
    1. 25 *
    2. 30
    3. 40
    4. 50
  3. _________________ can be inserted inside the conduit to pull the cables through the conduits
    1. GI
    2. Draw wire
    3. Both a & B *
    4. None of these
  4. Rigid PVC conduits are not suitable for use where the normal working temperature of the conduits and fittings may exceed ___________ degree C
    1. 60
    2. 70
    3. 65
    4. 55 *
  5. __________________________ wiring is a system of wiring in which PVC channels with covers are used for drawing wires
    1. Cleat
    2. Batten
    3. PVC
    4. Channel *
  6. The number of socket outlets of 5A in bedroom are ____________
    1. 2 to 3 *
    2. 1
    3. 4
    4. 5
  7. How many 15 A socket outlets are needed in kitchen
    1. 1
    2. 2 *
    3. 3
    4. 4
  8. For surface wiring system, however work should begin before final finishing work like __________________
    1. White washing *
    2. after plating
    3. after painting
    4. after ignoration

 

 

  1. Each circuit shall be provided with a ______________ in the phase wire and the neutral conductor shall be connected to a common link with disconnecting arrangement for testing.
    1. Fuse *
    2. Socket
    3. Switch
    4. All the above
  2. The load on the light and fan sub circuits should be restricted to ____________
    1. 600 watts
    2. 800 watts*
    3. 700 watts
    4. 1000 watts
  3. Incandescent lamps have ______________ rating
    1. 60 watts*
    2. 100 watts
    3. 25 watts
    4. 90 watts
  4. If we have 2 5A sockets of 100 watts each then the load in light circuit is _________
    1. 200 *
    2. 60
    3. 1000
    4. 500
  5. Load in light circuit of 2 5A (100 watt) 1 Lamp (60 watt ) and 1 ceiling fan(60 watt) is _______________W
    1. 240
    2. 530
    3. 320 *
    4. 400
  6. Load current in 1000 Watt power circuit is ___________________
    1. 33
    2. 167
    3. 17 *
    4. 497
  7. ___________________ cables are used to provide local area networks in schools offices
    1. UTP *
    2. PVS
    3. PVC
    4. TRS
  8. CAT 5 is used for _______________
    1. LAN
    2. Internet *
    3. Current
    4. Voltage
  9. Copper UTP wiring has __________ colours
    1. 6
    2. 7
    3. 8 *
    4. 10

 

  1. DSL stand for _______________
    1. Digital subscriber line *
    2. Direct subscriber line
    3. Digital signal line
    4. All the above
  2. RJ 45 jacks used for___________________
    1. Socket
    2. Internet using telephone modem *
    3. Dongle internet modem
    4. Wifi internet modem
  3. Coax cables is used to transmit ___________________
    1. Video*
    2. Data
    3. Power
    4. Signals
  4. Entertainment wiring requires _______________ cables
    1. Coax
    2. AV *
    3. PVC
    4. CAT 5
  5. The thickness of a wire conductive copper part is identified in ____________
    1. Wire gauge
    2. Micro meter
    3. Scale
    4. All the above

 

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