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Horizontal Engineering Exam Review (EBOLC)

Total questions: 20

Worksheet time: 2hrs 40mins

Name
Class
Date
1.

___________ is the ability of a soil to support the weight of vehicles under repeated traffic.

a)

Loadability

b)

Trafficability

c)

Liquid Limit

d)

CBR

2.

If a ditch has a depth of 4.5 feet and a slope ratio of 1:1, determine its cross-sectional area.

a)

20.25 sq ft

b)

4.5 sq ft

c)

21 sq ft

d)

5 sq ft

3.

Calculate the flow rate for a ditch with a cross-sectional area of 29.134 sq ft and a velocity of 2.631 ft/s

a)

1 cfs

b)

76.652 cfs

c)

77 cfs

d)

.601 cfs

4.

Calculate the Hydraulic Radius of a ditch with a depth of 1.7 ft and a slope ratio of 1:1.

a)

2.89 ft

b)

1 ft

c)

.601 ft

d)

1.7 ft

5.

A ditch is 560 feet long. It takes an object 620 seconds to float. Determine the water's velocity.

a)

350,000 fps

b)

.602 fps

c)

347,200 fps

d)

.903 fps

6.

_______ is a measure of the difficulty in excavating soil.

a)

Loadability

b)

Liquid Limit

c)

Trafficability

d)

CBR

7.

GM stands for what type of soil?

a)

Well graded gravel

b)

Poorly graded gravel

c)

Silty sand

d)

Silty gravel

8.

A soil's plastic limit is defined as the moisture content in percent at which it begins to crumble when rolled.

a)

True

b)

False

9.

How much material is in a planned trench 24 inches wide, 84 inches deep, and 300 feet long?

a)

156 BCY

b)

4200 BCY

c)

4200 LCY

d)

156 LCY

10.

A dozer can self-load, haul, and spread soil.

a)

True

b)

False

11.

Calculate the return travel time for a scraper traveling at 13.2 mph for 32,748 feet.

a)

29 mins

b)

28 mins

c)

28.192 mins

d)

2,480.909 mins

12.

The use of a 48 inch pipe with a FC value of 2.1 feet and a CR value of 3 feet is acceptable.

a)

True

b)

False

13.

Calculate how many trips per hour (TPH) a scraper can make in 45 mins with a cycle time of 10.874 mins.

a)

5 trips

b)

4.138 trips

c)

9 trips

d)

8.156 trips

14.

Estimate the hourly production of an 18 LCY scraper that can make 9.536 trips per hour.

a)

172 LCY/hr

b)

171 LCY/hr

c)

172.648 LCY/hr

d)

171.648 LCY/hr

15.

A 12 LCY load weighs 2,540 lbs/lcy. How many tons is the load?

a)

9.449 tons

b)

13.252 tons

c)

1.27 tons

d)

15.24 tons

16.

A 9 LCY dump would need to make how many trips to haul 300 LCY of gravel?

a)

33.333 trips

b)

34 trips

c)

32 trips

d)

31.354 trips

17.

A 19 LCY dump truck with a 5.3 min cycle time would haul 434 LCY in how many hours?

a)

2 hours

b)

3 hours

c)

5 hours

d)

4 hours

18.

What's the hourly production of a sheep's foot compactor operating on ML, a width of 6 feet, efficiency of 0.547

a)

97 CCY/hr

b)

96.294 CCY/hr

c)

53.497 CCY/hr

d)

54 CCY/hr

19.

Using a 5 LCY wheel loader to load moist loam, calculate its ideal production rate.

a)

600 LCY/hr

b)

500 LCY/hr

c)

499.8 LCY/hr

d)

599.824 LCY/hr

20.

An earthwork volume sheet is necessary to create what?

a)

A mass diagram

b)

A daily schedule

c)

A construction bid

d)

Scope of Work