Question: A conductor, due to sag between two supports, takes the form of____________?

• 1. semi-circle
• 2. triangle
• 3. ellipse
• 4. catenary

Question: 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

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

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

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

• 1. alloy steel
• 2. stainless steel
• 3. mild steel
• 4. high speed steel

Question: 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

Question: The total losses in a well designed D.C. generator of 10 kW will be nearly______________?

• 1. 100 W
• 2. 500 W
• 3. 1000 W
• 4. 1500 W

Question: The condition for maximum efficiency for a D.C. generator is______________?

• 1. eddy current losses = stray losses
• 2. hysteresis losses = eddy current losses
• 3. copper losses = 0
• 4. variable losses = constant losses

Question: D.C. generators are normally designed for maximum efficiency around_____________?

• 1. full-load
• 2. rated r.p.m.
• 3. rated voltage
• 4. all of the above

Question: In a D.C. generator, the iron losses mainly take place in___________.

• 1. yoke
• 2. commutator
• 3. armature conductors
• 4. armature rotor

Question: D.C. generators are installed near the load centres to reduce_____________?

• 1. iron losses
• 2. line losses
• 3. sparking
• 4. corona losses