QUES: The first commutator DC electric motor capable of turning machinery was invented by the British scientist William Sturgeon in 1832. Following Sturgeon's work, a commutator-type direct-current electric motor made with the intention of commercial use was built by the American inventor Thomas Davenport, which he patented in 1837. The motors ran at up to 600 revolutions per minute, and powered machine tools and a printing press. Due to the high cost of primary battery power, the motors were commercially unsuccessful and Davenport went bankrupt. Several inventors followed Sturgeon in the development of DC motors but all encountered the same battery power cost issues. No electricity distribution had been developed at the time. Like Sturgeon's motor, there was no practical commercial market for these motors.

What was the main problem with applying early electric motors to industry?
What is the answer?
ANS: the high cost of primary battery power
QUES: The USB standard specifies relatively loose tolerances for compliant USB connectors to minimize physical incompatibilities in connectors from different vendors. To address a weakness present in some other connector standards, the USB specification also defines limits to the size of a connecting device in the area around its plug. This was done to prevent a device from blocking adjacent ports due to the size of the cable strain relief mechanism (usually molding integral with the cable outer insulation) at the connector. Compliant devices must either fit within the size restrictions or support a compliant extension cable that does.

Why were loose tolerances allowed for compliant USB connectors?
What is the answer?
ANS: to minimize physical incompatibilities in connectors from different vendors
QUES: In general, translators have sought to preserve the context itself by reproducing the original order of sememes, and hence word order when necessary, reinterpreting the actual grammatical structure, for example, by shifting from active to passive voice, or vice versa. The grammatical differences between "fixed-word-order" languages (e.g. English, French, German) and "free-word-order" languages (e.g., Greek, Latin, Polish, Russian) have been no impediment in this regard. The particular syntax (sentence-structure) characteristics of a text's source language are adjusted to the syntactic requirements of the target language.

What is the active voice never shifted to when needed?
What is the answer?
ANS:
unanswerable