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Assignment 10, Continued - 14081_626
Assignment 10, Continued - 14081_628

Equipment Operator Basic - Beginning construction equipment operators manual
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10-40. Which  of  the  following  chain hoists  has  an  efficiency  of 85  percent? 1. Screw gear 2. Differential  chain 3. Spur gear 4. Spindle  gear 10–41. The capacity of a winch may be reduced  by  what  percentage  when the last layer of wire rope is being  wound  onto  the  winch  drum? 1. 30% 2. 40% 3. 50% 4. 60% 10–42. To avoid placing shock on a set of slings, you should start a crane lift quickly and smoothly. 1. True 2. False Learning  Objective: Recognize  the principles  of  mixing  and  drilling equipment. 10-43. On a transit mixer, how many revolutions of the drum at the rate of rotation is usually required  to  produce  a  specified uniformity  mix  of  concrete? 1. 10  to  40 2. 40  to  70 3. 70 to 100 4. 100 to 140 10-44. Concrete,  mixed  in  a  transit mixer,  should  be  delivered  within 1 1/2 hours or before the drum has revolved a maximum of how many times  after  the  introduction  of water? 1. 100 2. 200 3. 300 4. 400 10-45. A loaded down for keep the transit mixer has been more than an hour. To concrete inside the truck, total of how many to  the  concrete? 1. 2 pounds 2. 5 pounds 3. 10 pounds 4. 15 pounds from setting up you should add a pounds of sugar 10–46. The  crete  mobile  carries  which  of the  following  ingredients  in divided bins mounted on the unit? 1. Cement 2. Sand 3. Coarse  aggregates 4. All of the above 10–47. The mixing action of a crete mobile  is  a  continuous  process that can proceed until the aggregate bins are empty. 1. True 2. False 10-48. To keep an earth auger from bouncing,  when  working  in  hardpan or rocky soil,    an operator should take what action. 1. Increase  the  engine  rpm 2. Slip  the  clutch 3. Use  support  jacks 4. Increase  the  air  pressure in the tires 10-49. To  clean  the  drilling  components of dirt when raising the auger bit from a drilling hole, you should take which of the following actions? 1. Increase  the  drill  rpm 2. Lower  the  engine  speed 3. Tilt the auger fore and aft while the engine is running 4. Tilt the auger fore and aft while slowly pulling the bit out of the hole 75







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