Electrical machine MCQs Quizlet (Bank of Solved Questions Answers)

1. : One kWh is equal to how many kcal?
(A) 863
(B) 800
(C) 860
(D) 816

2. : The Scott connection is used for converting:
(A) Single phase to two-phase
(B) Three phase to single phase
(C) Single phase to three phase
(D) None of these

3. : In LEDs, the material used is:
(A) Gallium Arsenide
(B) Germanium
(C) Silicon
(D) Silicon and Germanium

4. : The phase difference between two consecutive coils in a three-phase transformer is:
(A) 120°
(B) 130°
(C) 140°
(D) 50°

5. : Which of the following materials is not used to make strain gauges?
(A) Bronze
(B) Pure platinum
(C) Plastic
(D) Copper

6. : Which type of motor is used in refrigerators?
(A) Capacitor induction motor
(B) Split phase induction motor
(C) Shaded pole induction motor
(D) None of these

7. : A device that converts fixed DC input to a variable DC output voltage is called a:
(A) Converter
(B) Chopper
(C) Regulator
(D) Stabilizer

8. : The circulating current should not exceed:
(A) 10% of normal current
(B) 70% of normal current
(C) 130% of normal current
(D) 75% of normal current

9. : The response of a linear interpolator is a _____ pulse.
(A) Triangular
(B) Rectangular
(C) Linear ramp
(D) None of these

10. : The test that is also known as a back-to-back test is:
(A) Sumpner test
(B) Radiation test
(C) Field test
(D) None of these