STS Test Prep Questions and Answers 100% Correct

STS Test Prep Questions and Answers 100% Correct Where employee brings their own PEE, what is the responsibility of the employer? Assure the PPE's adequacy. (OSHA pg 127) What's the standard for eye protection? ANSI Z89.1-1969 (OSHA pg 127) How to ensure that a rope will hold a load? Checkt o see if the rated load capacity for the rope is being exceeded. Stairway handrails should be installed at ____ from the surface of the tread to upper surface of the handrail. 48" Safety Instruction Signs shall be what color? Green upper panel with white letters for principal message. Other shall be black on white background. What two colors are on a directional sign (not automotive)? Black and white. (OSHA pg 159) NFPA 704 Label: Blue signifies __________ and is on located on the ____. Health hazard, left. NFPA 704 Label: Red signifies __________ and is on located on the ____. Fire hazard, top. NFPA 704 Label: Yellow signifies __________ and is on located on the ____. Reactivity, right. NFPA 704 Label: 0 is ____ hazardous and 4 is _____ hazardous _____. least, most. NFPA 704 Label: Bottom diamond is reserved for ______. Specific hazards (acids, alkali, corrosive, oxidizer, radioactive, Use no water. Yellow ractivity diamond is often referring to reactivity with _____. Water. Fire extinguishers - Type A Ordinary Combustibles (Ashes) Fire extinguishers - Type B Flammable Liquids (Barrels) Fire extinguishers - Type C Electrical Equipment (Current) Fire extinguishers - Type D Combustible Metals 2A10BC Fire extinguisher. What does the 2 mean? For Type A fires, a 1 would stand for the equivalent of 1 ¼ gallons of water, a 2 would represent 2 ½ gallons, 3 would be 3 ¾ gallons of water, etc. Each number adds 1 ¼ gallons equivalent of water. 2A10BC Fire extinguisher. What does the 10 mean? For Type B and Type C fires, the number represents square feet of fire. For example, 2 would be two square feet, 5 is five square feet. Scaffold top rail height (range). 38-45 inches. Who is responsible for PPE? Employer Minimum depth that a PE is required to design a shoring system. 20' What should you do with tool O&M manuals? a)Go over them with the workers b)Put them on the jobsite, and have the workers go over them before starting work. a) Go over them with the workers. An OSHA compliance officer issues a citation. Who is responsible? (worker, GC, super, foreman) General Contractor When monitoring a confined face, which should you check for first? Oxygen Deficiency. T/F , before entering a permit-required confined space, the attendant and everyone need to be on lifelines. True Requirements of _____ include attendant remaining in sight of all employees and lifelines for everyone. Permit-required confined spaces Operating vibrating equipment can cause what syndrome/disorder? Raynaud's Syndrome If an instrument measuring flammable gas reads 30%, the 30% stands for 30% of _________. the lower exposure limit What is the state of gas between the LEL (lower explosive limit) and the UEL (upper explosive limit)? explosive. What is the state of gas above the upper explosive limit. Over-concentrated and not explosive. Regarding LEL and UEL, gas concentration is a percentage of the total volume of the flammable gas with the balance being __________. Normal air. IDLH Immediately Dangerous to Life or Health Maximum depth of a trench before a ladder is needed for access and egress. 4 feet Who can supervise the erection of a 50-foot scaffold? Competent person. What rail protection is required for scaffolds located 10 feet or more above lower level scaffolds? Handrails, Mid rails, and toe boards. Key factor for implementing a good safety program. Getting foremen and supervisors involved. Minimum distance between ladders used for access and egress into an excavation. 25 feet. Handrails should be capable of withstanding ____ lbs of force. 200 lbs. Minimum width of access to an exit in new construction per NFPA. 36 inches Primary reason for storing acetylene cylinders upright. Prevent liquid acetone from escaping and releasing acetylene. Boom indicator indicates _______. Boom angle relative to horizontal. What color is used to mark potential hazards? Yellow. Which would be most likely to produce severe injuries or a high probability of accidents? (routine tasks or unusual, non-routine tasks). Unusual non-routine tasks. Acetylene reacts violently with ______. Fluorine No more than ___ gal of flammable or combustible liquids shall be stored in a room outside of an approved storage cabinet. 25 gallons. OSHA recommends __ foot candles for general construction work. 5 fc What's most important in developing a safety training program? (objectives, methods, qualification, or material)? Objectives The firewall separating oxygen and fuel gasses should be ___ feet high. 5 feet Cost of lost days is a ______ cost. Direct cost Lost production is a______ cost. Indirect Damage by welders flash is caused by ______ light. Ultraviolet light. CO is particularly dangerous because (keeps blood cells from carrying oxygen or it makes you sleepy). keeps blood cells from carrying oxygen Maximum allowable continuous noise level is ____. 90 dBA Maximum allowable peak noise level is ____. 140 dB OSHA requires employers to establish a hearing conservation program. It should include_____, _____, and ____. Area noise level survey, audiometric testing, PPE. Heavy sweating, racing pulse, weakness, nausea, and headache are symptoms of what heat-related disorder. Heat Exhaustion. A Class IA flammable liquid has a flash point ______ and a boiling point ________. Flash point below 73'F. Boiling point below 100'F. Class IB flammable liquids have a flash point ______ and a boiling point _______. Flash point below 73 °F and a boiling point greater than or equal to 100 °F Class IC flammable liquids have a flash point ______ and _______. Flash point greater than or equal to 73 °F and below 100 °F Class II combustible liquids have a flash point ______ and _______. Flash point greater than or equal to 100 °F and below 140 °F Class IIIA combustible liquids have a flash point _____ and _______. Flash point greater than or equal to 140 °F and below 200 ° Class IIIB combustible liquids have a flash point _______. Flash point greater than or equal to 200 °F Name the most important practice when storing chemicals (ventilation, fire protection, grounding, segregation). Segregation Flame arresters work because they_____________. Dissipate the external heat below the self-ignition point. What type of fire extinguisher is used for an acetone fire? Type B. Label is Red Square with B in center. Who is in charge of the emergency plan? (supervisor or superintendent). Supervisor. What is the major exposure hazard to chemical components? (Inhalation, Absorbtion, Ingestion). Inhalation Place it the proper order for controlling hazards: Work practice controls, Engineering controls, and PPE. Engineering controls, Work Practice Controls, and PPE Ramps used for access to the site must be a minimum of ___ inches wide. 18 inches wide. That's 2 planks wide, that must be cleated together. Removing sharp edges, reporting and fixing loose floor boards, and covering holes in the floor are examples of __________ controls. engineering controls. What three things are needed to work on a scaffold system? Be trained in that system. Scaffold inspected daily. Have permission to use it. T/F - Do not ride scaffold when moving. T T/F - You can use a ladder on a rolling scaffold to extend reach. F What is true of tieing off while on a hanging scaffold. Must have an independent lifeline. Requirements for railing at scaffolding Top and mid-rail required on all open sides. Toe-bards when people are required to work or pass under scaffold. Scaffold capacities typically range from ___ to ___ lbs per square foot. 25 to 75 lbs Height to base ratio for rolling scaffolds must usually be __ to __. 4 to 1. Differs in some states. Ladder jack scaffolds shall not be used more than __ feet above the ground. 20 feet. How frequently shall scaffold systems be inspected? Daily. _____ are the leading cause of injuries and fatalities in the construction industry Falls - account for 1/3 of fatalities. Ladders must be inspected ______ and inspection must be documented. annually by a competent person. Should also be inspected prior to each use. T/F All self-propelled lift equipment requires worker to be tied off to an anchorage point within the lift. True Maintain __ ft of clearance from overhead powerlines (up to 50 kV only). 10 feet over 50 to 200 kV requires what minimum clearance from power lines (crane requirements) 15 feet. Over 750 to 1000 kV is 45 feet. Rule of thumb: Outrigger pads should be how big compared to the outrigger float? pads should be 3 times the area of the outrigger float. Common boom failure - sideloading. What is it and what can cause it? When one side of the boom is taking a majority of the load. Happens when crane is out of plumb, when load is uneven, when swinging loads, or from wind. T/F Crawler cranes need to be accompanied by a spotter while driving. True. Must be accompanied. What is the correct way to protect someone from being struck by crane counterweight? Worker safety zone must be flagged off to protect workers. ______ must be inspected on tower cranes before they can be used. Limit switches (similar to anti-two block devices). Tested at 110% capacity. Concrete base of tower crane must be designed by ____________. A professional engineer. ____ is the name of the piece that travels along the main jib of a tower crane and carries the hook block. The trolley. A critical pick is one exceeding ___% of the load chart value. 85% On a crane chart, above the heavy line, values represent ______ failure. Below they represent ______ failure. Structural. Stability. Crane operator certification lasts for ____ years 5 years. Access to energized equipment operating at ___ volts or more shall be guarded or restricted. 50 volts Grounding rods shall be driven ____ feet into the earth 6 to 8 feet Some modern tools don't have grounds, but protect worker with _____________. Double insulation. Maintain a minimum clearance of ___ feet from power lines 10 feet. Of particular concern is risk of arcing. Controlled access zones must be no closer than ____from the edge and run parallel with the edge. 6 feet 4 Reasons a Permit is required for a confined space: 1. hazardous atmosphere. 2. Contains materials that could engulf the worker (sand,water). 3. Shape in a way that could trap the worker. 4. Has other hazards (heat, cold, machinery, etc.).