Q&A Hero

Q: 120. The text describes a dramatic lesson in safety learned from the historic construction of the Golden Gate Bridge. What was that lesson? Describe in general what happened. (It is not necessary to remember the exact numbers involved; just describe the situation in general.)

Q: 105. Which of the following pieces of construction equipment are exempt from requirements for ROPS? a. wheel-type agricultural tractors b. sideboom pipelaying tractors c. motor graders d. rubber-tired, front-end loaders

Q: 121. The purpose of concrete rebar caps isto prevent forms kick-out.to prevent impalement.to cap the flow of the concrete above the rebar.to improve the strength of the poured wall or other structure.

Q: 106. The dynamic test a. is an alternative to the static test for ROPS b. is required in addition to the static test for ROPS c. is mandatory in lieu of a static test for ROPS d. none of the above

Q: 122. Vibrating equipment used on freshly poured concrete can lead to a. forms kickout. b. impalement of concrete workers. c. the angle of repose. d. uneven distribution of the rebar.

Q: 107. The dynamic test for ROPS is to roll the vehicle over in the field.a. trueb. false

Q: 108. The field test for ROPS employs a 2-ton (more specifically, a 2000-kg)pendulum.a. trueb. false

Q: 109. ROPS are an acceptable alternative to seat belts.a. trueb. false

Q: 110. Backup alarms on construction vehicles are a. prohibited b. an administrative control c. an engineering control d. none of the above

Q: 111. All trenches are excavations.a. trueb. false

Q: 80. Specified scaffold plank overhang is a. less than specified overlap b. more than specified overlap c. illegal d. none of the above

Q: 96. Which of the following is not a hazard when helicopters are used for lifting? a. cargo hook will not release b. filler blocks not used c. fire on the ground d. static electricity

Q: 81. Pan-type treads are hollow a. to make them light-weight b. to permit filling with concrete c. after completion of the job d. none of the above

Q: 97. Pictured is a a. headache ball b. wrecking ball c. two-block d. tube lock

Q: 82. Safety belts and lifelines for personnel on suspended swinging scaffolds must be tied to the building, not to the scaffold.a. trueb. false

Q: 98. It is permissible to move personnel on a material hoist.a. trueb. false

Q: 83. Safety belts and lifelines for personnel on suspended swinging scaffolds must be tied to the scaffold, not to the building.a. trueb. false

Q: 84. Hollow pan-type treads are filled on-site with concrete or other materials.a. trueb. false

Q: 85. Which of the following can lead to two-blocking? a. hoisting the load b. extending the boom c. lowering the load d. all of the above e. none of the above

Q: 86. Which of the following does not lead to two-blocking? a. riding the headache ball b. hoisting the load c. lowering the load d. extending the boom

Q: 87. Which of the following does not lead to two-blocking? a. hoisting the load b. lowering the load c. extending the boom d. retracting the boom

Q: 88. Most of the fatalities resulting from two-blocking have occurred in the construction industry.a. trueb. false

Q: 89. Two-blocking results froma. insufficient clearance at the rear of the crane cabb. riding the headache ballc. hoisting the load too highd. adding a block (pulley)to the load block to create a mechanical advantage of two.

Q: 90. Riding the headache ball is expressly prohibited by OSHAa. trueb. false

Q: 91. The hazard of riding the headache ball is that it a. can lead to two-blocking b. can overstress the crane boom c. is expressly prohibited by OSHA d. none of the above

Q: 92. Construction workers are forbidden from crawling out onto the horizontal jib of a hammerhead tower crane.a. trueb. false

Q: 93. Why is the length of tag lines limited when used with helicopters?

Q: 78. Tiebacks are a. an alternative to cornice hooks b. a secondary means of support for cornice hooks c. asking for trouble when they cross an entire roof d. none of the above

Q: 94. Required crane clearances from power lines is less during transit than during crane operation.a. trueb. false

Q: 79. Indicate scaffold plank overhand specifications by drawing a sketch.

Q: 95. How is the Failsafe Principle of Redundancy applied to helicopter cargo hooks?

Q: 64. On construction sites incandescent bulbs a. must be guarded b. must be guarded unless deeply recessed c. must be equipped with a GFCI d. are prohibited

Q: 65. Molded or vulcanized splices are permitted in flexible cord.a. trueb. false

Q: 66. Molded or vulcanized splices are prohibited in flexible cord.a. trueb. false

Q: 67. Home-made ladders used in construction are illegal.a. trueb. false

Q: 68. For what application are filler blocks an acceptable alternative to inset cleats?

Q: 69. Filler blocks are used on ladders to a. brace cleats b. stop cracks c. strengthen side rails d. reduce spalling

Q: 70. What is the acceptable alternative to insetting the cleats on job-made ladders?

Q: 71. What is the acceptable alternative to using filler blocks to brace the cleats on job-made ladders?

Q: 72. A home-made ladder uses 2x4 lumber for the siderails and cleats. The cleats are nailed to the siderails. How should this ladder be modified to meet safety standards?

Q: 54. Workers most exposed to arc flash are a. utility maintenance workers b. refinery turnaround workers c. OSHA inspectors d. new hires

Q: 73. The design safety factor for scaffolds is: a. 3 b. 4 c. 5 d. 6

Q: 55. To determine the energy released in an arc flash the power in megawatts is multiplied by the a. current flow in amperes b. voltage measured in megavolts c. the force in newtons d. the duration in seconds

Q: 74. The design safety factor for scaffold suspension ropes is a. 3 b. 4 c. 5 d. 6

Q: 56. Which of the following will result in the largest arc flash? a. one second of power b. one pound of TNT c. 20 cycles of power exposure d. one gram of TNT

Q: 75. Which of the following is not a type of scaffold? a. window-jack scaffold b. outrigger scaffold c. bowstay scaffold d. chicken ladder

Q: 60. What is the full name for a GFCI?

Q: 76. What is the hazard of using concrete blocks for "cribbing?"

Q: 61. A principal drawback of an assured equipment grounding conductor program is so-called "nuisance tripping".a. trueb. false

Q: 77. Cornice hooks are an alternative to tiebacks.a. trueb. false

Q: 62. A good grounding conductor can provide protection similar to the GFCI.a. trueb. false

Q: 63. Economic impact analyses have shown what system to be a cheaper alternative to GFCIs?

Q: 45. Common modern electrical circuits have three conductors. Identify and explain the purpose of each of the three. In your explanation, mention safety features and explain how devices are used to detect and deal with unsafe conditions that may arise.

Q: 46. Write a brief paragraph on the physiology of electric shock. Include explanations of organs affected, electric current levels that are dangerous, conditions that aggravate the problem, and why.

Q: 47. A certain string of Christmas tree lights has 100 bulbs, each rated at 500 milliwatts. The string of lights plugs into a standard 120 volt circuit. Assume that there is no ground fault. Calculate the current flow through the hot wire. Calculate the current flow through the neutral.

Q: 48. Explain the term "fibrillation" and how it relates to the field of safety.

Q: 49. Show calculations to determine the power of the arc flash that would be generated from an accidental fault in 480-volt circuit that is capable of delivering a current of 10,000 amperes.

Q: 34. When a receptacle wiring tester is plugged into a receptacle that has an open ground a. no indicators will light b. one indicator will light c. two indicators will light d. three indicators will light

Q: 50. Electrical energy is measured in a. amperes b. volts c. watts d. joules

Q: 35. In which of the following testers are you likely to find a battery? a. receptacle wiring tester b. circuit tester c. continuity tester d. none of the above

Q: 51. The release of arc flash energy is measured in a. millivolts b. megawatts c. megajoules d. volt-newtons

Q: 36. The diagram illustrates what type of tester?

Q: 52. The release of arc flash energy is measured in all of the following except: a. megawatts b. joules c. megajoules d. grams of TNT

Q: 37. The diagram illustrates what type of tester?

Q: 53. The term used to refer to the loud explosion and sudden release of large amounts of energy in a high energy electrical discharge is a. uncontrolled demolition b. electrical detonation c. megafault d. arc flash

Q: 38. The diagram illustrates what type of tester?

Q: 39. An alternative to GFCIs on construction sites is a. the use of anti-two blocking devices b. an assured equipment grounding program c. double insulation on all tools d. Underwriters Laboratories or Factory Mutual Engg approval

Q: 40. A typical 120-volt household circuit delivers 350 watts of power to an appliance, and another 10 watts of power are consumed by the circuit. There is no ground fault.a. How much current is carried by the hot wire?b. How much current is carried by the neutral?c. How much current is carried by the grounding conductor?

Q: 41. Explain the limitations of the phrase "electricity follows the path of least resistance," as it pertains to electrocution hazards.

Q: 42. Which of the following miswiring conditions is likely to cause a piece of equipment to continue to operate even after it is turned off? a. reversed polarity b. ground jumped to neutral c. ground and neutral reversed d. open ground

Q: 43. Calculate the maximum total resistance below which a 120 volt circuit will trip a 15 amp breaker. Show your work.

Q: 44. Explain the difference between an ordinary circuit breaker and a GFCI. Include in your explanation what the letters "GFCI" literally represent.

Q: 29. "Double insulation" is permitted in lieu of a. grounding b. circuit breakers c. fuses d. GFCIs

Q: 14. What is the principal disadvantage of relying upon defibrillation devices to save the lives of electrocution victims?

Q: 30. A loose or corroded connection in the neutral circuit will cause a. a decrease in resistance and an increase in voltage drop b. an increase in resistance and a decrease in voltage drop c. a decrease in resistance and a decrease in voltage drop d. an increase in resistance and an increase in voltage drop

Q: 15. Which of the following circuit voltage levels results in the most frequent occurrence of electrocution? a. 110v b. 220v c. 440v d. 7800v

Q: 31. When equipment is connected to a circuit having an "open ground," but equipped with a GFCI a. a fuse will blow or a breaker will be tripped b. the equipment will not operate c. the GFCI will be tripped d. the equipment will operate normally

Q: 16. Which of the following circuit voltage levels results in the most frequent occurrence of electrocution? a. 6v b. 12v c. 110v d. 220v

Q: 32. When a receptacle wiring tester is plugged into a receptacle that is wired correctly a. no indicators will light b. one indicator will light c. two indicators will light d. three indicators will light

Q: 17. Which of the following is the least important factor in determining whether an electrocution will take place? a. dampness at the point of contact b. body weight of the individual c. path of current through the body d. wounds in the skin where contact is made