The voltage used for suburban trains in D.C. system is usually_______________?

Related Mcqs:

1. A series resonant band-stop filter consists of a 68 Ω resistor, a 110 mH coil, and a 0.02 µF capacitor. The internal resistance, RW, of the coil is 4 Ω. Input voltage is 200 mV. Output voltage is taken across the coil and capacitor in series. What is the output voltage magnitude at f0?

   A. 1.1 mV
   B. 11.1 mV
   C. 111 mV
   D. 200 mV

2. A series resonant band-pass filter consists of a 2 mH coil, a 0.005 µF capacitor, and a 120 Ω resistor. The winding resistance of the coil is 12 Ω. The output voltage is taken off the resistor. Input voltage is 12 Vrms. What is the output voltage magnitude at the center frequency (f0)?

   A. 10.9 V
   B. 1.09 V
   C. 1.1 V
   D. 12 V

3. Speed-time curve of main line service differs from those of urban and suburban services on following account_______________?

   A. it has longer free running period
   B. it has longer coasting period
   C. accelerating and braking periods are comparatively smaller
   D. all of the above

4. The rate of acceleration on suburban orurban services is restricted by the consideration of______________?

   A. Engine power
   B. Track curves
   C. Passenger Discomfort
   D. Track size

5. In main line service as compared to urban and suburban service______________?

   A. distance between the stops is more
   B. maximum speed reached is high
   C. acceleration and retardation rates are low
   D. all of the above

6. The rate of acceleration on suburban orurban service is in the range_________________?

   A. 0.2 to 0.5 km phps
   B. 1.6 to 4.0 km phps
   C. 5 to 10 km phps
   D. 15 to 25 km phps

7. _______________watt-hours per tonne km is usually the specific energy consumption for suburban services?

   A. 15—20
   B. 50—75
   C. 120—150
   D. 160—200

8. Automatic signalling is used for which of the following trains ?

   A. Mail and express trains
   B. Superfast trains
   C. Suburban and Urban electric trains
   D. All trains

9. In a CE amplifier, the phase difference between voltage across collector load RC and signal voltage is _________________?

   A. 180o
   B. 270o
   C. 90o
   D. 0o

10. A certain voltage divider consists of three 1 kΩ resistors in series. Which of the following load resistors will have the least effect on the output voltage?

    A. 1 MΩ
    B. 100 kΩ
    C. 1 kΩ
    D. 330 Ω