QUES: In the Soviet Union, in the 1970s, a comparison was made between systems electrified at 3 kV DC and 25 kV AC (50 Hz). The results showed that percentage losses in the overhead wires (catenary and contact wires) was over 3 times greater for 3 kV DC than for 25 kV AC. But when the conversion losses were all taken into account and added to overhead wire losses (including cooling blower energy) the 25 kV AC lost a somewhat higher percent of energy than for 3 kV DC. Thus in spite of the much higher losses in the catenary, the 3 kV DC was a little more energy efficient than AC in providing energy from the USSR power grid to the terminals of the traction motors (all DC at that time). While both systems use energy in converting higher voltage AC from the USSR's power grid to lower voltage DC, the conversions for the DC system all took place (at higher efficiency) in the railway substation, while most of the conversion for the AC system took place inside the locomotive (at lower efficiency). Consider also that it takes energy to constantly move this mobile conversion hardware over the rails while the stationary hardware in the railway substation doesn't incur this energy cost. For more details see: Wiki: Soviet Union DC vs. AC.
What was less energy efficient in than AC in providing energy?

ANS: unanswerable

QUES: Soon after the defeat of the Spanish Armada in 1588, London merchants presented a petition to Queen Elizabeth I for permission to sail to the Indian Ocean. The permission was granted, and despite the defeat of the English Armada in 1589, on 10 April 1591 three ships sailed from Torbay around the Cape of Good Hope to the Arabian Sea on one of the earliest English overseas Indian expeditions. One of them, Edward Bonventure, then sailed around Cape Comorin and on to the Malay Peninsula and subsequently returned to England in 1594.
Who did the London merchants petition to get permission to sail the Indian Ocean?

ANS: Queen Elizabeth I

QUES: Czech syntax has a subjectverbobject sentence structure. In practice, however, word order is flexible and used for topicalization and focus. Although Czech has a periphrastic passive construction (like English), colloquial word-order changes frequently produce the passive voice. For example, to change "Peter killed Paul" to "Paul was killed by Peter" the order of subject and object is inverted: Petr zabil Pavla ("Peter killed Paul") becomes "Paul, Peter killed" (Pavla zabil Petr). Pavla is in the accusative case, the grammatical object (in this case, the victim) of the verb.
What sentence structure is used in Pavla?

ANS: unanswerable

QUES: Tennessee (i/tnsi/) (Cherokee: , Tanasi) is a state located in the southeastern United States. Tennessee is the 36th largest and the 17th most populous of the 50 United States. Tennessee is bordered by Kentucky and Virginia to the north, North Carolina to the east, Georgia, Alabama, and Mississippi to the south, and Arkansas and Missouri to the west. The Appalachian Mountains dominate the eastern part of the state, and the Mississippi River forms the state's western border. Tennessee's capital and second largest city is Nashville, which has a population of 601,222. Memphis is the state's largest city, with a population of 653,450.
What is Tennessee's most populous city?

ANS:
Memphis