What is one of the primary functions of a roof ladder
a. provide a secondary means of egress
b. provide lightweight, rapid access to a roof
c. reduce the risk of roof collapse during ventilation operations
d. reduce the number of fire fighters required for vertical ventilation
Answer: c. reduce the risk of roof collapse during ventilation operations
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?Materials that are ____, like uranium, radium, thorium, and actinium emit photons of energy and/or particles as the nuclei disintegrate and decrease in mass.
A. ?ionized B. ?electrolytic C. ?isotopic D. ?radioactive
Which of the following is a true statement about rigging hardware?
a. Shouldered eyebolts are not acceptable for lifting operations. b. Screw-pin shackles require a cotter key to be installed in the end of the pin. c. Serrated-jaw clamps are the only type of hardware that needs no rated load information. d. Plate clamps are designed to lift only one plate at a time.
When replacing a damaged crown and pinion gearset, the damaged pinion cone (PC) variation number was +2, and the new PC variation number is specified as -5. If the original shim pack thickness measured 0.030-inch (0.76 mm), what should the new shim pack thickness be?
A. .033-inch (0.84 mm) B. .037-inch (0.94 mm) C. .023-inch (0.58 mm) D. .027-inch (0.69 mm)
A 30 degree diagonal has a c-c of 14". What is the offset?
Fill in the blank(s) with the appropriate word(s).