1. What is the formula for the moment of inertia? (m – a mass of the body, r – distance from the axis of the rotation) A. ∑miri2 B. ∑miri C. ∑miri4 D. ∑miri3 2. The generated e.m.f from 50-pole armature having 400 conductors driven at 20 rev/sec having flux per pole as 30 …
Determination of Moment of Inertia of Electrical Machines MCQ Read More »
1. What is the formula for the moment of inertia? (m – a mass of the body, r – distance from the axis of the rotation) A. ∑miri2 B. ∑miri C. ∑miri4 D. ∑miri3 2. The generated e.m.f from 50-pole armature having 400 conductors driven at 20 rev/sec having flux per pole as 30 …
1. The axis along which no emf is produced in the armature conductors is called as ____________ A. Geometrical Neutral Axis (GNA. B. Magnetic Neutral Axis (MNA. C. Axis of rotation D. Axis of revolution 2. The generated e.m.f from 25-pole armature having 200 conductors driven at 10 rev/sec having flux per pole as …
1. Servo motors are an example of which type of load? A. Pulsating loads B. Short time loads C. Impact loads D. Short time intermittent loads 2. Load torque of the crane is independent of _________ A. Speed B. Seebeck effect C. Hall effect D. Thomson effect 3. The unit of angular velocity …
1. Duty cycle (D) is _______ A. Ton÷Toff B. Ton÷(Ton+ Toff) C. Ton÷2×(Ton+ Toff) D. Ton÷2×Toff 2. A 220 V, 1000 rpm, 60 A separately-excited dc motor has an armature resistance of .5 ω. It is fed from a single-phase full converter with an ac source voltage of 230 V, 50Hz. Assuming continuous conduction, …
1. What is the empirical formula for the tractive force required to overcome curve resistance? (W-the weight of the body, R – radius of curvature) A. 710×W÷R B. 700×W÷R C. 720×W÷R D. 750×W÷R 2. Force resisting the upward motion of a body on an inclined plane is given by (alpha – the angle of …
1. What is the empirical formula for the tractive force required to overcome curve resistance? (W-the weight of the body, R – radius of curvature) A. 710×W÷R B. 700×W÷R C. 720×W÷R D. 750×W÷R 2. Force resisting the upward motion of a body on an inclined plane is given by (alpha – the angle of …
1. Regenerative braking mode can be achieved in which quadrant (V-I curve)? A. Third B. Second C. Fourth D. First 2. Fan type of loads exhibits which type of load torque characteristics? A. Constant torque characteristics B. Linearly rising torque characteristics C. Non-Linearly rising torque characteristics D. Non-Linearly decreasing torque characteristics 3. Type-A …
1. Load torques can be classified into how many types? A. Three B. Two C. Four D. Five 2. Rolling mills exhibit what type of load torque characteristics? A. Constant torque characteristics B. Linearly rising torque characteristics C. Non-Linearly rising torque characteristics D. Non-Linearly decreasing torque characteristics 3. What is the relationship between …
1. Load torques can be classified into how many types? A. Three B. Two C. Four D. Five 2. Rolling mills exhibit what type of load torque characteristics? A. Constant torque characteristics B. Linearly rising torque characteristics C. Non-Linearly rising torque characteristics D. Non-Linearly decreasing torque characteristics 3. What is the relationship between …
