Deck 4: Excavations

Question 1

A profile board is used to determine

A) The position of electricity cables on site
B) The depth of the water table
C) The depth of the topsoil
D) The position of boulders on site
E) The position of trenches on site

Answer 1

E

Question 2

The purpose of a waling in support to excavation is to

A) Support the soil to the side of the excavation
B) Support the struts
C) Support the poling boards
D) Provide access into the trench
E) Provide egress out of the trench

Answer 2

C

Question 3

A tractor shovel would generally be used to excavate

A) Trenches
B) Basements
C) Vegetation
D) Boreholes
E) Trial pits

Answer 3

C

Question 4

Topsoil is excavated from the site before construction work commences mainly because

A) It contains harmful bacteria
B) It has a high level of acidity
C) It has a high level of alkalinity
D) It supports plant growth
E) It has a strong odour

Question 5

Close boarded excavation support would generally be used in

A) Stiff clay soils
B) Loose gravel
C) Firm sandy soil
D) Compact shale
E) Organic soils

Question 6

The purpose of a poling board in support to excavation is to

A) Support the soil to the side of the excavation
B) Support the struts
C) Support the walings
D) Provide access into the trench
E) Provide egress out of the trench

Question 7

A bulldozer would generally be used to excavate

A) Trenches
B) Basements
C) Site strip
D) Boreholes
E) Trial pits

Question 8

A backhoe is a versatile machine because

A) It uses diesel fuel
B) It has pneumatic tyres
C) It can excavate through 360⁰
D) It can excavate in very confined spaces
E) It can be operated without a licence

Question 9

Quarter sheeting excavation support would generally be used in

A) Firm clay soils
B) Loose gravel
C) Saturated sandy soil
D) Fine silts
E) Organic soils

Question 10

The angle of repose of soil is

A) The angle at which non-cohesive soils will suffer shear failure
B) The angle at which cohesive soils will suffer plasticity failure
C) The angle at which non-cohesive soils will retain water
D) The angle at which soils will be frost resistant
E) The angle at which banked soils will be stable