Most Expected Questions and answers for PCMC /ssc/RRB je exam

1➤ The electrical insulators are used to ____

allow high inrush current prevent the unwanted flow of currentincrease the unwanted flow of currentallow the unwanted flow of current

2➤ A direct voltage is applied to a peak diode voltmeter whose scale is calibrated to read rms voltage of a sine wave. If the meter reading is 36 Vrms, the value of the applied direct voltage is:

25715136

3➤ The form factor for a pure sinusoidal waveform is:

0.7071.111.4140.637

4➤ In the moving-coil instrument, the _________ resistance connected in _________ with the coil is called a shunt.

low, serieshigh, serieshigh, parallellow, parallel

5➤ Isotopes are elements having:

same atomic number but different mass number different atomic number but same mass numberdifferent atomic number and different mass number Same atomic number and same mass number

6➤ Electrical shock can cause damage to:

muscletissueinternal organsAll of the above

7➤ The ACSR (Aluminium Conductor Steel Reinforced) provides _________ sag and _________ Span than copper conductors

greater, shorterlower, shorter lower, longergreater, longer

8➤ The gross mechanical power developed by a DC motor is maximum when back EMF is:

greater than the applied voltageequal to the applied voltageequal to half the applied voltagenone of the above

9➤ In the SCR, when the anode terminal is positive with respect to the cathode terminal, the number of blocked PN junction is:

4132

10➤ How many types of DC links are available in a HVDC system?

3421

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