Problem: Read the following paragraph and extract the answer for the question: What can cause problems when drilling with high torque? The two main requirements of an anti-torque system are that it should prevent rotation of the sonde, and it should allow easy movement of the drill up and down the borehole. Attempts have been made to design drills with counter-rotating components so that overall torque is minimized, but these have had limited success. Five kinds of anti-torque systems have been devised for use with cable-suspended EM drills, though not all are in current use, and some drills have used a combination of more than one design. The first drill to require an anti-torque system was used at Camp Century by CRREL in 1966; the drill incorporated a set of hinged friction blades that swung out from the sonde when the drill motor was started. These were found to have very weak friction against the borehole wall, and were ineffective; the drill had to be controlled carefully to prevent twisting the cable. No other drills have attempted to use this approach.For the next deployment of the drill leaf springs were installed, and this has proved to be a more durable design. These are mounted vertically, with a curve outwards so that they are easily compressed by the borehole wall, and can slide up and down with the movement of the drill. They pass easily through any areas of irregularity in the borehole, but the edges of the springs cut into the borehole wall and prevent rotation. Leaf springs are very simple mechanically, with the additional benefit of being easy to adjust by changing the spacing between the end points. They can be placed anywhere on the drill that does not rotate, so they do not add length to the sonde. The shape is usually a fourth-order parabola, since this has been determined to provide the most even loading against the borehole wall. Leaf springs have been found to be so effective that they can prevent rotation even in heavy drills running at full power.Skate antitorque systems have blades attached to vertical bars which are pushed against the borehole wall; the blades dig into the wall and provide the...

A: skates

Problem: Read the following paragraph and extract the answer for the question: What is the first name of the person whose operas fell out of fashion in the mid-18th century.? Agrippina (HWV 6) is an opera seria in three acts by George Frideric Handel with a libretto by Cardinal Vincenzo Grimani. Composed for the 170910 Venice Carnevale season, the opera tells the story of Agrippina, the mother of Nero, as she plots the downfall of the Roman Emperor Claudius and the installation of her son as emperor. Grimani's libretto, considered one of the best that Handel set, is an "anti-heroic satirical comedy", full of topical political allusions. Some analysts believe that it reflects Grimani's political and diplomatic rivalry with Pope Clement XI. Handel composed Agrippina at the end of a three-year sojourn in Italy. It premiered in Venice at the Teatro San Giovanni Grisostomo on 26 December 1709. It proved an immediate success and an unprecedented series of 27 consecutive performances followed. Observers praised the quality of the musicmuch of which, in keeping with the contemporary custom, had been borrowed and adapted from other works, including the works of other composers. Despite the evident public enthusiasm for the work, Handel did not promote further stagings. There were occasional productions in the years following its premiere but Handel's operas, including Agrippina, fell out of fashion in the mid-18th century. In the 20th century Agrippina was revived in Germany and premiered in Britain and America. Performances of the work have become ever more common, with innovative stagings at the New York City Opera and the London Coliseum in 2007. Modern critical opinion is that Agrippina is Handel's first operatic masterpiece, full of freshness and musical invention which have made it one of the most popular operas of the ongoing Handel revival.

A: George

Problem: Read the following paragraph and extract the answer for the question: What coast guard cutter saved Haig and Eva from the Requite? A USCG pilot and his winchman Haig answer an SOS call at sea and arrive at a derelict schooner, the Requite. Haig lowers himself to the ship, where he finds three dead bodies along with one survivor, Eva, cowering in the cabin. As the pilot attempts to retrieve Haig and Eva with a rescue basket, the line breaks, plunging the two into the ocean. After they swim back to the boat, the pilot informs Haig that he must return to base because his fuel is borderline. Eva and Haig spend the night on the boat, during which time she recounts the story of the storm that killed everyone else aboard. She explains to him that the strange events began soon after they found a priest drifting in the ocean, apparently a survivor of a disaster. Then, she tells Haig of the violent storm that caused all of the freakish deaths on the boat. One man was hurled through a hatch; one is hanging from the ship's mast; another vanished before her eyes; and a fourth man is in an aft compartment, floating in the air. Eva attributes the deaths to supernatural causes, but Haig has a practical explanation for everything, including the man who appears to be floating in the air. Early the next morning, the pilot returns along with the Coast Guard cutter Venturous. Haig and Eva are transferred from the Requite to the deck of the Venturous, where they board the helicopter for the flight back to Miami. At the same time, Coast Guard personnel from the Venturous investigate the wrecked schooner. The story takes a bizarre turn when the Venturous' captain calls Haig to tell him that what they found on the ship was not what Haig reported. Right after Haig hears about the discovery, another nightmare begins. The film is an example of a twist ending.

A: Venturous

Problem: Read the following paragraph and extract the answer for the question: What is the full name of the person that got the former horse-racing correspondent his current job? As the Germans invade Poland in September 1939, the former horse racing-correspondent Colin Metcalfe is placed as a foreign correspondent in neutral Norway. Eight months later he meets a Norwegian fisherman, Captain Alstad, in a sailors' bar, where a scuffle breaks out between British and Norwegian sailors (singing "Rule Britannia", egged on by Metcalfe) and German ones (singing the Nazi Party anthem the "Horst-Wessel-Lied"). Alstad takes him aboard his boat during a sea voyage in Norway's territorial waters, during which they sight the Altmark and are fired upon by a German U-boat, despite Norway's neutrality. They then come back to his home port of Langedal, and Metcalfe goes to Oslo to report this to the British embassy there, despite the best efforts of the German Kommandant and the German-sympathising local police chief Ottoman Gunter. There Metcalfe meets Frank Lockwood en route back to England from the Winter War in Finland. It was Lockwood who had got him the foreign correspondent job at the outbreak of war, but he now passes on the news to Metcalfe that he has been fired from it for sailing out with the fisherman rather than staying on dry land where the paper can contact him. Metcalfe informs the embassy, and also warns his paper of signs that a German war on Norway is imminent. Alstad's daughter Kari (who had accompanied them on their voyage) also meets him to tell him of suspicious German merchant ships at Bergen which her father suspects have troops on board.

A:
Frank Lockwood