ASSIGNMENT 8
Textbook Assignment:
“Graders and Scrapers” and “Dozers and Rollers,” pages 10–19 through
11-29.
Learning Objective:
(continued)
Recognize the principles and
components of scrapers.
8-1.
Which of the following scraper
components forms the rear wall
of the bowl?
1.
The stinger
2.
The apron
3.
The ejector
4.
The paddle wheel
8-2.
Which of the following are the
basic control levers on a scraper?
1.
The bowl
2.
The apron control
3.
The ejector
4.
All of the above
Learning Objective:
Recognize the
principles of scraper operations.
8-3.
When you are operating a scraper,
what component must be properly
engaged to obtain maximum engine
power output?
1.
Transmission gear ratio
2.
Differential lock
3.
Bogie drive shift lever
4.
Transfer case sprag unit
8–4.
Improper down shifting overspeeds
the transmission and engine usually
resulting in premature wear.
1.
True
2.
False
8-5.
Downhill scraper speed should NOT
exceed what maximum speed in miles
per hour (mph) more than attained
on level ground in the transmission
ratio engaged?
1.
20
2.
15
3.
10
4.
05
8-6.
A scraper work cycle has a total
of how many phases of operation?
1.
One
2.
Two
3.
Three
4.
Four
8-7.
To allow material to enter the bowl
when loading a scraper, you should
ensure the apron is opened by what
number of inches above the cutting
edge?
1.
Between 1 to 3
2.
Between 4 to 8
3.
Between 9 to 12
4.
Between 13 to 15
8–8.
What term is used to describe a
scraper bowl load that is filled
to capacity?
1.
Struck load
2.
Full load
3.
Heaped load
4.
Top load
8-9.
When a push cat is waiting for a
scraper, it should be positioned
at what degree angle off the lane
to be cut?
1.
90°
2.
75°
3.
45°
4.
15°
56
