Question: Reluctance motor is a________________?

• 1. variable torque motor
• 2. low torque variable speed motor
• 3. self starting type synchronous motor
• 4. low noise, slow speed motor

Question: A reluctance motor_________________?

• 1. is provided with slip rings
• 2. requires starting gear
• 3. has high cost
• 4. is compact

Question: ___________________is preferred for synthetic fibre mills?

• 1. Synchronous motor
• 2. Reluctance motor
• 3. Series motor
• 4. Shunt motor

Question: Which of the following motors is used for elevators ?

• 1. Induction motor
• 2. Synchronous motor
• 3. Capacitor start single phase motor
• 4. Any of the above

Question: ________________ motor is a constant speed motor?

• 1. Synchronous motor
• 2. Schrage motor
• 3. Induction motor
• 4. Universal motor

Question: The starting torque of a D.C. motor is independent of which of the following?

• 1. Flux
• 2. Armature current
• 3. Flux and armature current
• 4. Speed

Question: need frequent starting and stopping of electric motors ?

• 1. Paper mills
• 2. Grinding mills
• 3. Air-conditioners
• 4. Lifts and hoists

Question: Which of the following motors are best for the rolling mills ?

• 1. Single phase motors
• 2. Squirrel cage induction motors
• 3. Slip ring induction motors
• 4. DC motors

Question: For which of the following applications D.C. motors are still preferred ?

• 1. High efficiency operation
• 2. Reversibility
• 3. Variable speed drive
• 4. High starting torque

Question: ___________________is not a part of ball bearing ?

• 1. Inner race
• 2. Outer race
• 3. Cage
• 4. Bush