Crane A+ Basic Principles with Complete
Solutions
a ... boom angle results in ... crane capacity - ANSWER-small; less
a jib whose angle to the boom can be changed as desired by the crane operator via jib
reeving is a - ANSWER-luffing jib
a telescoping boom is exteded or retracted using - ANSWER-hydraulic cylinders
a weight used to aid unspooling from a hoist drum is called a - ANSWER-headache ball
additional area used to transmit and spread loads under outriggers is known as -
ANSWER-blocking
boom length is the distance measured from the center of the... to the center of the... -
ANSWER-boom hinge pin; sheave pin at the boom tip
if a crane rigged with a jib, it is supported and/or raised and lowered with the -
ANSWER-jib forestay/backstay
location of a crane's center of gravity in relation to its tipping fulcrum directly affects its...
- ANSWER-leverage and stability
Most commonly used lifting devices for heavy construction are - ANSWER-Mobile
construction cranes and forklifts
point where upper body mechanism joins base of a crawler crane - ANSWER-carbody
regulation require that all jibs on conventional-type booms have a mechanical stop that
prevents their movement if the jib is more than ... degrees above the straight line of the
jib and boom - ANSWER-5
rough-terrain cranes have ... cabs - ANSWER-swing or fixed
the advantage of wheel-mounted cranes over crawler cranes is that wheel mounted
cranes can... - ANSWER-be driven to the work site
the boom of a crane can be extended by adding a - ANSWER-jib
the extendable arms mounted on the crane base called - ANSWER-outriggers
the horizontal distance from the axis of rotation to the center of the load block with the
load suspended is the ... - ANSWER-operating radius
Solutions
a ... boom angle results in ... crane capacity - ANSWER-small; less
a jib whose angle to the boom can be changed as desired by the crane operator via jib
reeving is a - ANSWER-luffing jib
a telescoping boom is exteded or retracted using - ANSWER-hydraulic cylinders
a weight used to aid unspooling from a hoist drum is called a - ANSWER-headache ball
additional area used to transmit and spread loads under outriggers is known as -
ANSWER-blocking
boom length is the distance measured from the center of the... to the center of the... -
ANSWER-boom hinge pin; sheave pin at the boom tip
if a crane rigged with a jib, it is supported and/or raised and lowered with the -
ANSWER-jib forestay/backstay
location of a crane's center of gravity in relation to its tipping fulcrum directly affects its...
- ANSWER-leverage and stability
Most commonly used lifting devices for heavy construction are - ANSWER-Mobile
construction cranes and forklifts
point where upper body mechanism joins base of a crawler crane - ANSWER-carbody
regulation require that all jibs on conventional-type booms have a mechanical stop that
prevents their movement if the jib is more than ... degrees above the straight line of the
jib and boom - ANSWER-5
rough-terrain cranes have ... cabs - ANSWER-swing or fixed
the advantage of wheel-mounted cranes over crawler cranes is that wheel mounted
cranes can... - ANSWER-be driven to the work site
the boom of a crane can be extended by adding a - ANSWER-jib
the extendable arms mounted on the crane base called - ANSWER-outriggers
the horizontal distance from the axis of rotation to the center of the load block with the
load suspended is the ... - ANSWER-operating radius
