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WorksheetsQuiz No.7. Scrapers (830PM)
Total questions: 20
Worksheet time: 29mins
Scrapers are available with loose-heaped capacities up to about 44 yd3, although in the past a few machines as large as ____yd3 have been offered
55
80
60
100
none of these
The struck capacity is the volume that a scraper would hold if the top of the material was struck off even at the bottom of the bowl.
True
False
Dual-Engine Wheeled Scraper is best for?
Soft or light terrains such as loam and sand
Rigid terrains such as clay, gravel and dirt
Wet, sticky muddy, and rough terrain
Going down on uneven slopes of wet terrain
none of these
The optimum haul distance for small-and medium-size scrapers is 914.40 meter or less
True
False
The Society of Automotive Engineers (SAE) specifies a repose slope of __________________for scrapers
45 degrees
63.43 degrees
26.57 degrees
90 degrees
none of these
Shuttle push-loading technique for shortcuts where it is possible to load in both directions. The pusher pushes one scraper, then turns and pushes a second scraper in the same direction
True
False
What type of scraper is in the figure?
elevating
dual engine wheeled
pull-type
single-engine wheeled
none of these
Based on studies, the average turn time in the cut is ____________
0.21 mins
21 mins
2.1 mins
12.6 sec
none of these
Back-track push-loading technique is impractical to load in both directions. However, this method is inefficient due to the time spent in backing up and repositioning for the next load
True
False
consists of a wagon with a gate with a bladed bottom that can either be self-propelled or towed
ejector
bowl
blade
chain
none of these
It is used for shortcuts where it is possible to load in both directions. The push cart pushes one scraper in one direction, then turns and push loads a second scraper in the opposite direction
back-track method
push cart loading
shuttle loading
tandem pushing
none of these
Maneuver time + Load time + Boost time + Return time is equal to a complete
scraper production cyle
production cycle
pusher cycle
all of these
none of these
The following are type of Self-Loading Scrapers except
auger
elevating
tandem powdered axle
push-pull
none of these
Which of the following does not belong to the group
loading
dumping and spreading
haul time
return travel
turning
A particular material was hauled by a scraper, if a scraper heaped load is 22.5 yd3, and the bank measure volume is 10% higher than the heap load, determine the swell factor.
0.82
0.91
0.091
1.0
none of these
If a Push-loaded scraper hauls a bank measure volume of 22.5 yd3 and the appropriate swell factor, what is the calculated heap load of a dry earth material with a swell factor of 0.80?
19.80 lcy
19.80 bcy
408.73 lcm
22.5 bcy
none of these
In specifying its volume, manufacturers usually specify the slope of the material above the sides of the bowl with the designation SAE
bcy
lcy
swell factor
heaped load
All of these
What is the word that can be formed using the jumbled letters below:
echeagrwlesrepde
use small letters only
two words separated by a space
one letter is a dummy
(a)
Tests indicate that the swell factors in Table 4.3 should be increased by approximately ___________ for material push-loaded into a scraper
10%
25%
66.6%
75%
none of these
it is a technique where the cut is long, making it possible to pick up two or more scraper loads without backtracking
tandem
bowl
chain
dual
none of these
