5-6 Month Final Flashcards
What is the weight of a 36-foot American Standard I Beam designated S15x42.9
equation W=w/ft x L
1544.4lb
If both ends of the sling are attached to the hoist hook and a load is suspended by the center of the sling, what hitch is being used?
double basket
Which of the following hooks has a point designed to fit in a hole in the load?
sorting hook
If a sling leg is attached to a suspended load at an angle of less than 90°, the force acting on the sling leg
increases as the sling angle gets smaller
A hook should be removed from service if
the tip is twisted more than 10% out of line
If the strands of a wire rope appear to spiral down to the right, and if the wires in the strands appear to be parallel to the rope axis, the wire rope is
right regular lay
If a wire rope is classified as 6 x 37, the figure 37 means that
each strand of the rope contains a nominal 37 wires
The following factors all affect wire-rope strength. In which one is the D/d ratio important?
bending over a curved surface
Which of these wire rope end fittings is the most efficient (assuming all are prepared correctly)
speltered socket
If a rigger finds that a wire rope sling is kinked, he should
remove it from service
Which of the following identifications would be most likely to appear on the links of a chain suitable for overhead lifting?
800
The specification for welded-link chain that corresponds to a wire rope’s rated load is called the chain’s
working load limit
If an alloy steel chain sling has been subjected to temperatures over 1000°F (540°C)
it should be removed from service
There is a slot in one of the standard end fittings for metal mesh slings. It allows the sling to be used in a _____ hitch
choker
You should recommend removing a metal mesh sling from service if
one welded joint at the edge of the sling is broken
The strongest and most popular of the synthetic-fiber ropes is
nylon
To avoid sharp bending and abrasion, the eye of a fiber-rope sling should include a
thimble
A fiber-rope sling should be removed from service if it
shows kinking
The rated load, or capacity of an encased polyester sling is indicated by the
color of the cover
You should remove a synthetic-web sling from service if
it is scorched
A pocket wheel is part of a(n)
overhead manual chain hoist
The purpose of an upper limit switch is to
keep the load block from rising dangerously high
The difference between top-running and underhung cranes lies in
how the end trucks of the bridge beams are supported
When a rigger lifts a load a few inches, then stops to see if the load drifts downward, what is he checking?
hoist brakes
Wire rope should be removed from hoist service if the rigger finds
two broken wires at a socketed end fitting
In a crane operation involving several people:
the operator must respond to a “stop” signal from anyone
You should not use metal-mesh slings
if the spirals do not move freely
When working with floor-operated hoists and cranes, you should make sure that
obstructions can be cleared by moving the load
One edge of the load serves as a pivot during _____ turning
one-hook
When should blocks or other holding devices placed at the location where a load will be set?
before the load is lifted
The height of a movable sectional metal scaffold that measures 4x8 ft at the base should not exceed _____ ft
16
A hydraulic scissors lift of the larger type can safely support _____ workers and their equipment
2
Each worker on a suspended scaffold must wear a safety belt connected to a lanyard attached to
the structure being worked on
When you secure a scaffold with guy wires, what accessories do you use to tighten the wires to the correct tension?
Turnbuckles
A wooden ladder must NOT be coated with
paint
Before new equipment arrives at the plant, plans for installing it are made by the
plant engineer
When pouring a concrete footing, you should hold the steel rods in position with
tie wires
The best materials for filling around a foundation are gravel and
ground concrete slabs
The type of bolt to anchor the equipment is usually specified by the
equipment manager
How long must new concrete sit before you install equipment on it?
28 days
Retainers on the sides of horizontally reciprocating equipment keep it from
walking
To isolate anchor bolts when mounting equipment on pads, surround the bolts with
neoprene tubing
What type of wrench should you use for tightening anchor bolts?
Torque
To drill anchor bolt holes larger than 1 1/2 in., you should use a
core bit with a diamond or carbide bit
You should not use a concrete mix to grout anchor bolts, because the concrete
shrinks when it sets
If new equipment is damaged in shipment, you should report it to the
carrier
What must you do first before disconnecting the electric wiring to existing equipment?
shut off the power
What is the least number of rollers you should use under a load on a skid
three
When moving equipment with a crowbar, what should you use between the bar and the floor?
a wood block
If you have no clearance to remove a sling after setting the equipment down, you should lower the equipment onto
wedges
To keep your body heat from affecting a master precision level, you should handle it by its
nonheat-conductive top plate
To support a level on an inverted V-shaped way, use a precision
V-block
To support a level across machine tool ways in different planes, you should use precision ground parallels or
gauge blocks
The common dial indicator is usually used with a _____ base.
magnetic
When an alignment screw is finally set, you can prevent further movement by
applying a sealing compound
The external air lines on equipment usually terminate just beyond a filter or a
regulator
If the fluid in a system is thick, you can control it with a ______ check valve.
ball
You can keep the fluid pressure in a line near a preset level with a ____ valve.
regulating
A copy of the manufacturer’s test data is often attached to the ____ of new equipment.
manual
High temperatures during equipment startup is usually caused by
poor lubrication
A metal’s ability to be stretched into wire without breaking is called its _____. Its ability to return to its original shape after being deformed is called its _____.
ductility; elasticity
Which of he following magnetic materials is an alloy?
Alnico
A solid and a liquid can exist together at the ____. Adding heat melts more of the solid _____ changing the temperature.
melting point; without
An alloy containing iron as the base metal is
steel
Machinability is the speed and ease with which a metal
can be cut on a machine tool
The maximum amount of stress a material can exert is called its
yield strength
A standard tensile test specimen exerts a resistance force of 8500 lb. What is the stress in the specimen?
42,000 psi
When a metal supports a heavy load at high temperature, it may undergo
creep
The mass of material per unit volume is called its
density
The ration of a material’s density to the density of water is called its
specific gravity
Permanent-mold casting uses
both metal cores and sand cores
The method of casting metal parts by using a spinning mold to force the molten metal away from the center and against the sides of the mold is called _____ casting.
centrifugal