Computer Programming MCQs

5739 MCQs  (Page 181 of 574)

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A mercury arc rectifier possesses __________ regulation characteristics
A. Straight line
B. Curved line
C. Exponential
D. None of the above
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In a mercury arc rectifier________ flow from anode to cathode
A. Ions
B. Electrons
C. Ions and electrons
D. Any of the above
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In a three-phase mercury arc rectifiers each anode conducts for____________?
A. One-third of a cycle
B. One-fourth of a cycle
C. One-half a cycle
D. Two-third of a cycle
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Which of the following mercury arc rectifier will deliver least undulating current?
A. Six-phase
B. Three-phase
C. Two-phase
D. Single-phase
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When a rectifier is loaded which of the following voltage drops take place ?
A. Voltage drop in transformer reactance
B. Voltage drop in resistance of transformer and smoothing chokes
C. Arc voltage drop
D. All of the above
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In a mercury arc rectifier characteristic blue luminosity is due to_____________?
A. Colour of mercury
B. Ionization
C. High temperature
D. Electron streams
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In a glass bulb mercury arc rectifier the maximum current rating is restricted to___________?
A. 2000 a
B. 1500 a
C. 1000 a
D. 500 a
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The ionization potential of mercury is approximately_____________?
A. 5.4 v
B. 8.4 v
C. 10.4 v
D. 16.4 v
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The voltage drop between the anode and cathode, of a mercury arc rectifier comprises of the following_____________?
A. Anode drop and cathode drop
B. Anode drop and arc drop
C. Cathode drop and arc drop
D. Anode drop, cathode drop and arc drop
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The voltage drop at anode, in a mercury arc rectifier is due to_____________?
A. Self restoring property of mercury
B. High ionization potential
C. Energy spent in overcoming the electrostatic field
D. High temperature inside the rectifier
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Word of the Day
22 Jul
Combative
ready or eager to fight or argue.
لڑاکا، متنازع، جھگڑالو

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