Question: The starting torque in case of centrifugal pumps is generally_________________?

• 1. less than running torque
• 2. same as running torque
• 3. slightly more than running torque
• 4. double the running torque

Question: Which part of a motor needs maximum attention for maintenance ?

• 1. Frame
• 2. Rearing
• 3. Stator winding
• 4. Rotor winding

Question: Which feature, while selecting a motor for centrifugal pump, will be of least significance ?

• 1. Starting characteristics
• 2. Operating speed
• 3. Horse power
• 4. Speed control

Question: Ward-Leonard controlled D.C. drives are generally used for _____________________ excavators?

• 1. Light duty
• 2. Medium duty
• 3. Heavy duty
• 4. All of the above

Question: For a particular application the type of electric-and control gear are determined by which of the following considerations ?

• 1. Starting torque
• 2. Conditions of environment
• 3. Limitation on starting current
• 4. All of the above

Question: The load cycle for a motor driving a power press will be________________?

• 1. variable load
• 2. continuous
• 3. continuous but periodical
• 4. intermittent and variable load

Question: Which of the following motors always starts on load ?

• 1. Conveyor motor
• 2. Floor mill motor
• 3. Fan motor
• 4. All of the above

Question: While selecting an electric motor for a floor mill, which electrical characteristics will be of least significance ?

• 1. Running characteristics
• 2. Starting characteristics
• 3. Efficiency
• 4. Braking

Question: The selection of an electric motor for any application depends on which of the following factors ?

• 1. Electrical characteristics
• 2. Mechanical characteristics
• 3. Size and rating of motors
• 4. All of the above

Question: Which of the following motors is preferred for traction work ?

• 1. Universal motor
• 2. DC series motor
• 3. Synchronous motor
• 4. Three-phase induction motor