Hand, Power and Powder-Actuated Tools questions for the CHST

Question 1

A carpenter is fastening furring strips to a concrete wall with a powder-actuated tool. Partway through the shift, the tool begins to misfire intermittently and the barrel assembly feels loose. What must the competent person direct?

1. AContinue using the tool if the misfires are cleared by the operator each time
2. BRemove the tool from service immediately and do not use it again until it has been properly repaired
3. CUse only reduced-power loads for the rest of the day, then tag the tool out
4. DFinish the shift with the tool but have the operator wear a face shield

Question 2

A crew needs to move a pneumatic chipping hammer from the ground to a second-floor deck. The hammer is positively secured to its air whip with a proper retainer, and the hose is rated well above the supply pressure. To save time, a worker shuts off the air, ties off the hose, and hauls the tool up by pulling on the hose. How should the safety technician evaluate this?

1. AA violation only if the hose is larger than 1/2-inch inside diameter and has no pressure-reducing safety device
2. BCompliant, because the air supply was shut off before the hose carried the tool's weight
3. CCompliant, because the tool is positively secured to the hose and the hose is within the manufacturer's safe operating pressure
4. DA violation, because hoses may not be used for hoisting or lowering tools, whatever the tool connection or pressure rating

Question 3

In a temporary fabrication area on a job site, a crew sets a heavy stationary machine that is designed for a fixed location directly on the concrete slab without any fasteners. After a few hours of operation, vibration has made the machine creep several inches across the floor. The machine's point-of-operation guards are all in place. What does the standard require the crew to do?

1. APost a warning sign on the machine and keep other workers outside the painted line
2. BLeave it unanchored, since the movement is minor and the guards are in place
3. CSecurely anchor the machine so it cannot walk or move during operation
4. DPaint a line around the machine and have the operator push it back into position at the start of each shift