MCQ: Which of the following is not a constituent for making porcelain insulators ?

1. Quartz
2. Kaolin
3. Felspar
4. Silica

MCQ: Which of the following relays is used on long transmission lines?

1. Impedance relay
2. Mho’s relay
3. Reactance relay
4. None of the above

MCQ: The steel used in steel cored conductors is usually__________?

1. alloy steel
2. stainless steel
3. mild steel
4. high speed steel
5. all of the above

MCQ: Which of the following distribution systems is more reliable?

1. Radial system
2. Tree system
3. Ring main system
4. All are equally reliable

MCQ: Which of the following characteristics should the line supports for transmission lines possess?

1. Low cost
2. High mechanical strength
3. Longer life
4. All of the above

MCQ: Transmission voltage of 11 kV is normally used for distances up to_____km?

1. 20—25 km
2. 40—50 km
3. 60—70 km
4. 80—100 km