T.R.I.P. 2 Prep Exam

What is the total resistance of the mixer?

What is the total load on snatch block A?

What is the angle factor at snatch block A?

What is the load on shackle A?

The Alloy chain bridle attached to the mixer needs to be a MINIMUM of what size and grade?

If the bridle attached to the mixer has a width of 36″, the MINIMUM length of each leg must be?

What will the tow truck anchor weigh with all of it’s brakes locked?

What is the total load on anchor “A”?

What is the block load at snatch block “C”?

Using a 4:1 design factor, what will the U.L. be on the shackle that marries the wrinkle to the chain bridle on the mixer if the load on that shackle equals the W.L.L. of the shackle?

What is the load on Line B?

Working within manufacturers ratings, what would be the MINIMUM size wire rope that should be used in this recovery and would that wire rope be steel or fiber core?

What is the angle factor multiplier at snatch block E?

What is the angle factor multiplier at snatch block E?

What is the load on the shackle that is attached to anchor C?

What would; at a MINIMUM anchor F have to weigh?

What is the load on the shackle at anchor E?

What is the load at anchor D?

The casualty has been successfully recovered. The customer has directed you to tow the disabled mixer to his shop, approximately 10 miles in distance.

You have been given the necessary information on the casualty (mixer). The only information you have on the tow truck so far are the axle weights. To successfully complete this question, you will need to know it has a  320″ wheel base and a minimum overhang of 152″. With this information, calculate the tow capacity of the tow truck.

Will the tow truck be able to tow the casualty (mixer) and retain a minimum of 50% of it’s front axle weight and be within an operator’s tow capacity?

What is the gross combination weight for these units?

What would be the minimum size snatch block in tonnage should an operator use at anchor E?

What is the mechanical advantage at the mixer?

The shackle attaching snatch block F to anchor D has a W.L.L. of 10 tons, is this large enough for the load generated there?

The load forces generated at anchor D will require this anchor at MINIMUM to weight how many pounds?

Will the tow truck’s wire rope be within it’s W.L.L.?

If the air lines on the mixer were repaired and supplied with air to release the rear axle’s brakes or if the brakes were manually released and allowed to turn freely in the mire and with the front axle on a soft surface, what then would the total resistance of the mixer be?

If the tow truck’s winch was then engaged, would the mixer be the first to move?

With the tow truck (in the exam materials) having a static weight of 11,,896 lbs on the front axle and setting on a hard surface, 15 ° grade with the front axle’s brakes not locked. What should the tow truck’s anchor-ability be with only the rear axle wheels locked?

Snatch blocks C & D can be pulled to with-in what MINIMUM distance of snatch block G?

Calculate the lift capacity for the tow truck in this exam with it’s rear legs down, a wheelbase of 380 inches, and an overhang of 8 feet.

True or False? The chain bridle attached to the mixer, is at a recommended maximum length for the veer angle ratio?

If the tow truck being used in this recovery was equipped with 3/4″ fiber core wire rope and a three part line lay-up were used, (exactly as shown in the graphic, minus that 4th line) would the 3/4″ wire rope be within it’s W.L.L.?

What would the mechanical advantage now be on that 3 part line lay-up?

What would be the load on that 3/4 inch line if it were used?

When you begin winching, after your resistance has been calculated and your line load established, can line load ever change?