Electrical Quiz MCQ - Set 08 Electrical Quiz Quiz Questions 01. The relative permittivity of free space is given by (A) 1 (B) 10 (C) 100 (D) 1000 02. A Weston frequency meter is (A) Moving coil instrument (B) Moving iron instrument (C) Dynamometer instrument (D) None of the above 03. Unit for quantity of electricity is (A) Ampere-hour (B) Watt (C) Joule (D) Coulomb 04. The unit of capacitance is (A) Henry (B) Ohm (C) Farad (D) Farad/m 05. Load shedding is possible through which of the following? (A) Switching of the loads (B) Frequency reduction (C) Voltage reduction (D) Any of the above 06. A fuse is connected (A) In series with circuit (B) In parallel with circuit (C) Either in series or in parallel with circuit (D) None of the above 07. Instrument transformers are (A) Potential transformers (B) Current transformers (C) Both (A) and (B) (D) Power transformers 08. Which motor is preferred for use in mines where explosive gases exist? (A) Air motor (B) Induction motor (C) D.C. shunt motor (D) Synchronous motor 09. A fuse is never inserted in (A) Neutral wire (B) Negative of D.C. circuit (C) Positive of D.C. circuit (D) Phase dine 10. In case of 3phase induction motors, plugging means (A) Pulling the motor directly on line without a starter (B) Locking of rotor due to harmonics (C) Starting the motor on load which is more than the rated load (D) Interchanging two supply phases for quick stopping 11. Time constant of an inductive circuit (A) Increases with increase of inductance and decrease of resistance (B) Increases with the increase of inductance and the increase of resistance (C) Increases with the decrease of inductance and decrease of resistance (D) Increases with decrease of inductance and increase of resistance 12. A phasor represents (A) The magnitude and a quantity direction (B) The width of a quantity (C) The phase angle (D) The magnitude of a quantity 13. When the plate area of a capacitor increases, (A) The capacitance increases (B) The capacitance decreases (C) The capacitance is unaffected (D) The voltage it can withstand increases 14. International ohm is defined in terms of the resistance of (A) A column of mercury (B) A cube of carbon (C) A cube of copper (D) The unit length of wire 15. Which lightening stroke is most dangerous? (A) Direct stroke on line conductor (B) Indirect stroke on conductor (C) Direct stroke on tower top (D) Direct stroke on ground wire Submit Test Next Quiz Tests: Set 01 Set 02 Set 03 Set 04 Set 05 Set 06 Set 07 Set 08 Set 09
