Questions

Multiple-choice questions you can practise one by one. Open a question, tap an answer and see at once whether it is right. For a random set, try Quick practice.

941 questions

• Which gas is commonly used in some electrical equipment as an insulating medium because it is relatively inert under normal conditions?

  Electrical Engineering Materials › Unit 3: Insulating Materials · Easy

• Which gas is commonly used as an insulating and arc-quenching medium in electrical equipment?

  Electrical Engineering Materials › Unit 3: Insulating Materials · Easy

• SF6 gas is particularly useful in high-voltage switchgear because of its excellent?

  Electrical Engineering Materials › Unit 3: Insulating Materials · Easy

• Which gas is commonly used as an insulating medium in gas-insulated switchgear?

  Electrical Engineering Materials › Unit 3: Insulating Materials · Easy

• Which gaseous insulating material is normally available in the atmosphere?

  Electrical Engineering Materials › Unit 3: Insulating Materials · Easy

• The temperature limit of Class H insulation is approximately?

  Electrical Engineering Materials › Unit 3: Insulating Materials · Easy

• The temperature limit of Class F insulation is approximately?

  Electrical Engineering Materials › Unit 3: Insulating Materials · Easy

• The temperature limit of Class B insulation is approximately?

  Electrical Engineering Materials › Unit 3: Insulating Materials · Easy

• The temperature limit of Class A insulation is approximately?

  Electrical Engineering Materials › Unit 3: Insulating Materials · Easy

• Insulation temperature classes indicate the maximum permissible temperature of which part?

  Electrical Engineering Materials › Unit 3: Insulating Materials · Easy

• Which of the following is a solid insulating material?

  Electrical Engineering Materials › Unit 3: Insulating Materials · Easy

• Which of the following is a liquid insulating material?

  Electrical Engineering Materials › Unit 3: Insulating Materials · Easy

• Which insulating material is classified as a gaseous insulator?

  Electrical Engineering Materials › Unit 3: Insulating Materials · Easy

• On the basis of physical state, insulating materials are classified as gaseous, liquid and which other type?

  Electrical Engineering Materials › Unit 3: Insulating Materials · Easy

• Which physical property is important when selecting an insulating material for a particular application?

  Electrical Engineering Materials › Unit 3: Insulating Materials · Easy

• Which mechanical property helps an insulating material resist physical damage during handling?

  Electrical Engineering Materials › Unit 3: Insulating Materials · Easy

• Which visual characteristic is useful for identifying defects in an insulating material?

  Electrical Engineering Materials › Unit 3: Insulating Materials · Easy

• Which property is desirable in an insulating material to resist damage by acids and other chemicals?

  Electrical Engineering Materials › Unit 3: Insulating Materials · Easy

• Which property of an insulating material helps it withstand high temperatures without deterioration?

  Electrical Engineering Materials › Unit 3: Insulating Materials · Easy

• Which property indicates the ability of an insulating material to withstand an electric field without electrical breakdown?

  Electrical Engineering Materials › Unit 3: Insulating Materials · Easy