Flash_on_English_for_Construction

(ff) #1

Construction machinery


1 Read the text and label the pictures with the words in bold in the text.


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A tower crane is used to build ta ll
buildings, Its short arm carries a
counterweight of concrete blocks
and its lo ng arm carries lifting gear.
'le operator can sit in a cabin at
'le top of the tower just below t he
'1orizonta l boom or control the crane
by radio remote control from the
ground. The lifting hook is controlled
sJ a si'stem of sheaves,

Digging machines are used for
55 -5 :'::-c;--es <or subterranean
v: :) -=-s s::::~ Se.'.efS. erc. They
..;5:: 2 .;;-: !;; ,s_:;--2S 0: ; '0;--: loader)
anc c 55 -:5 -: ;;-;;:":s 5_Cn as a
ouc-<ei -5:) e :2: .. --:f: : f 2 ':J:anj
digging --2 r::2"''' ::5.5'~g
instruments ,,5:: ;: '::2: -5 s:r_::_,::
that is rotated a1C- 5 2-e :-52:;;C
path,

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A concrete mixer (or ceme-, - • er
m ixes cement aggregate (suc- as
cement or gravel) and water to fo'-
concrete. There are also portable
concret e mixers for smaller volume
work.

2 Read the text again and answer the questions.


1 What is a tower crane used for? How does it work?
2 Where can the operator sit?
3 What are d igging machines used for?

3 Find the words in the text for the following definitions.
1 a person who is employed to operate or control a machine
2 a curved device used for catching or holding things
3 narrow holes which are dug into the ground
4 longer and narrow er than is normal
5 small enough to be easily carried or moved

4 What do the rotary digging instruments use?
5 What does a concrete m ixer do?
6 What is usually used for smaller volume work?

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