Manholes and Handholes

Question 1

vaults usually house bulky items such as large transformers and network protective devices

Answer 1

true

Question 2

manholes serve as cable junction points for pulling in new or replacement cable or to splice existing cables.

Answer 2

true

Question 3

Manholes are usually located at street intersections, and the distance between them seldom exceeds 500 feet.

Answer 3

true

Question 4

What are manholes made of?

Answer 4

Precast-concrete

Question 5

The walls of precast-concrete vary in thickness from ? to ?.

Answer 5

8” to 2’

Question 6

Manholes are constructed in such a manner as to keep them as dry as possible.

Answer 6

True

Question 7

If manholes are incorporated into a system, the bottom of the excavation area should be firm and undisturbed or compacted earth.

Answer 7

true

Question 8

Conduit runs should terminate flush on the interior side of the manhole wall.

Answer 8

true

Question 9

If pulling eyes are installed in a manhole, they should be installed in the wall directly opposite the conduit run. Properly positioned pulling eyes help facilitate the pulling in of cable.

Answer 9

true

Question 10

Manholes are most used in a dense city environment because they ? .

Answer 10

give access to cables already in place

Question 11

To keep manholes free from water, ? are examples of active type systems.

Answer 11

automatic pumps

Question 12

The most common use for a manhole is to ? .

Answer 12

splice cables

Question 13

Manholes are usually located ? .

Answer 13

at street intersections

Question 14

A “three way” manhole is one where ? .

Answer 14

ducts enter and leave in three different directions

Question 15

Manhole covers have changed very little in the last century. They are made of steel with a minimum diameter of ? to allow for worker access.

Answer 15

32”

Question 16

A subsurface enclosure used on lateral two-way duct lines and are restricted to one-conductor cables, best describes a ? .

Answer 16

handhole

Question 17

Prior to the 1960s, manholes were primarily constructed of poured on site reinforced concrete or ? .

Answer 17

brick and mortar

Question 18

The size and shape of a manhole is usually determined by the ? .

Answer 18

number of ducts entering and leaving

Question 19

Manholes are always constructed on the site where they will be used.

Answer 19

False

Question 20

A vault or manhole kept dry by a drain connected to a sewer, typically will have a ? to prevent gas from entering.

Answer 20

Trap

Question 21

The type of surrounding soil affects the construction of a manhole.

Answer 21

True

Question 22

The backfill material around a manhole should be ? or the excavated material from the hole if it is fine and dry.

Answer 22

sand

Question 23

Conduit runs should terminate ? on the inside of the manhole wall.

Answer 23

flush

Question 24

If pulling eyes are installed in a manhole, they should be installed in the opposite wall ? the conduit termination.

Answer 24

directly across from