ELECTRICIAN THEORY

What is the back ground colour of warning sings in the basic category?

• Blue

• White

• Yellow

• Green

What is the name of the safety sing?

• Warning sing

• Mandatory sing

• Prohibition sing

• Information sing

What is the full form of "XLPE" cable?

• Cross Line Poly Ethylene

• X'ess Line Phase earthing

• Cross Linked Poly Ethylene

• Excess Length Paper and Ebonite

What dose the number 1.40 represent if a stranded conductor is designated as 10 Sq. mm cable of size 7/1.40?

• Area of cross section.

• Radius of one conductor.

• Diameter of all conductor

• Diameter of each conductor

What is the unit for Quantity of electricity?

• Mho

• Coulomb

• Volt / second

• Ampere / second

What is the formula is used to find Electro Motive Force (EMF)?

• EMF = Potential difference -Voltage drop

• EMF = Potential difference + Voltage drop

• EMF = Potential difference + Voltage drop / 2

• EMF = Potential difference + 2 * Voltage drop

Which type of wire joint is found in the junction box?

• Aerial tap joint

• Plain tap joint

• Rat tail joint

• Married joint

What is the purpose of bedding insulation of Under Ground cable?

• Protect the cable from mechanical injury.

• Protect the cable from moisture and gases.

• Protect armouring from atmospheric condition

• Protect the metallic sheath against corrosion

Which type of joint is used in over head lines for high tensile.

• Scarfed joint

• Britannia "T" joint

• Western union joint

• Britannia straight joint

What is the reading of the micrometer?

• 5.05 mm

• 5.00 mm

• 4.55 mm

• 4.05 mm