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Rectifiers and converters
| 1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
| 2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
| Q1 ⇒ A rotary converter in general construction
and design, is more or less like any D.C. machine [other wrong options] [Discuss in forum] |
| Q2 ⇒ The ionization potential of mercury is
approximately 10.4 V [other wrong options] [Discuss in forum] |
| Q3 ⇒ The advantage of mercury arc rectifier
is that all of the above [other wrong options] [Discuss in forum] |
| Q4 ⇒ A mercury arc rectifier possesses____
regulation characteristics straight line [other wrong options] [Discuss in forum] |
| Q5 ⇒ The efficiency of the copper oxide rectifier
seldom exceeds 65 to 75% [other wrong options] [Discuss in forum] |
| Q6 ⇒ The efficiency of an electrolytic rectifier
is nearly 0.6 [other wrong options] [Discuss in forum] |
| Q7 ⇒ In a single phase rotary converter the
number of slip rings will be two [other wrong options] [Discuss in forum] |
| Q8 ⇒ A rotary converter operates at a high power factor [other wrong options] [Discuss in forum] |
| Q9 ⇒ The potential drop in the arc, in a mercury
arc rectifier, varies none of the above [other wrong options] [Discuss in forum] |
| Q10 ⇒ In a mercury pool rectifier,the voltage
drop across its electrodes is almost independent of load current [other wrong options] [Discuss in forum] |
| Q11 ⇒ It is the____ of the transformer on which
the magnitude of angle of overlap
depends. leakage reactance [other wrong options] [Discuss in forum] |
| Q12 ⇒ Copper oxide rectifier is usually designed
not to operate above 45°C [other wrong options] [Discuss in forum] |
| Q13 ⇒ Which of the following is the loss within
the mercury arc rectifier chamber ? All of the above [other wrong options] [Discuss in forum] |
| Q14 ⇒ A synchronous converter can be started any of the above methods [other wrong options] [Discuss in forum] |
| Q15 ⇒ In which of the following applications,
direct current is absolutely essential ? Electrolysis [other wrong options] [Discuss in forum] |
| Q16 ⇒ The voltage drop between the anode
and cathode, of a mercury arc rectifier
comprises of the following anode drop, cathode drop and arc drop [other wrong options] [Discuss in forum] |
| Q17 ⇒ In a three-phase mercury arc rectifiers
each anode conducts for one-third of a cycle [other wrong options] [Discuss in forum] |
| Q18 ⇒ Selenium rectifier can be operated at
temperatures as high as 75°C [other wrong options] [Discuss in forum] |
| Q19 ⇒ The metal rectifiers, as compared to
mercury arc rectifiers operate on low temperatures [other wrong options] [Discuss in forum] |
| Q20 ⇒ A rotary converter is a single machine
with one armature and one field [other wrong options] [Discuss in forum] |
| Or |