Chapters 5, 6, & 7 (Possible Test Questions) - WEEK 5 Flashcards
Sling configurations:
- Vertical
- Choker
- Basket
A sling placed in the choke configuration is good for about ____ the wight of the same sling placed in a vertical configuration.
- half
A sling placed in the basket configuration is good for about _____ the wight of the same sling placed in a vertical configuration.
- twice
When should a choke sling be used?
- When a basket is not possible
The six type of web slings that can be purchased?
- Type 1 - (TC - Triangle Choker)
- Type 2 - (TT - Triangle to Triangle)
- Type 3 - (EE - Flat Eye and Eye)
- Type 4 - (EE - Twisted Eye and Eye)
- Type 5 - (EN - Endless)
- Type 6 - (RE - Reversed Eye)
Extra Improved Plow (EIP) consists of:
- 6 strands of 19 wires each
Most common uses of chains in the power delivery industry
- Securing Loads
- Provide rigging and attachment points
- Lifting and moving and other equipment
Chains that are used for lifting, rigging, or hoisting must be a minimum of:
- Grade 80 Alloy Chain
Chain slings for setting poles are normally designated as types
- CO or CP
Most common types of chain wear
- Stretching
- Wear at the end of each link where they connect
Material Shackles:
- Are used for attaching or joining hardware such as insulators assemblies to structures.
Rigging Shackles:
- Are used to join slings, provide effective means of choking slings, or provide attachment points for rigging purposes.
When a single sling in a vertical configuration supports a load, the tension on the sling is _____ to the load weight.
- equal
As the sling angle _________, the tension on each sling _________ substantially.
- decreases, increased
What formula would you use to calculate sling tension?
Sling Tension = Sling Length/ Sling Height x Weight/# of Slings
- When installing an overhead transformer, the sling must be as _____ as possible to maximize the lift to allow room below the conductors for the derrick.
- short
A pre-trip inspection might include:
- Checking the fluid levels of engines and hydraulic components
- Checking for burned out signal bulbs such as clearance, warning, and break lights
- Checking for break and tire wear
- Checking loose fittings, bolts/lug nuts, cut winch lines, bent, or broken body parts
- Cracked welds, missing steps, and railings
Digger derrick turrets are mounted in one of three configurations
- Rear Center
- Forward Center
- Corner Mount
If the truck is leveled as much as participle, but is still at an angle greater than 5 degrees, the boom should only be operated at the ___________ of the swing patters.
- lowest half
Load angle charts usually include at least the following information
- Load capacities
- Boom position (angle in degrees or extension)
- Operational Zones
- Notices and Warnings
When is a boom at its strongest?
- When it is fully retracted and at the highest possible angle
The actual lift capacity depends on several factors. List a few:
- The stability of the truck and the strength of the surface the truck is positioned
- The manufacture’s imposed lifting limitations
- The physical position of the boom relation to the load
The ability of a digger derrick to lift an object that is within its maximum lift capacity depends on two factors:
- The hook radius (the horizontal distance the hook is from the center of the turret)
- The sheave hight (The vertical distance the sheave is from the hight of the turret base)
Overide controls
- Allow ground personnel to operate the equipment from the ground in the event of an accident
When Excavating/Operating a Backhoe, the operator must be aware of:
- If the ground will support the weight of the backhoe
- Where the spoils will be stored
- How deep and wide the trench will be
- Who will assist in providing hand signals and which signals will be appropriate
- If buried utilities have been properly located
When digging on slopes, where should the spoils be placed?
- on the uphill side of the slope
