Английский язык. Теория механизмов и машин. Профессиональная составляющая языковой подготовки. Горбенко М.В - 70 стр.

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70
5. Think whether the given statements are true or false.
1. Bevel gears are usually made for a shaft angle of 80.
2. The axial thrust loads for zerol bevel gears are larger than for the spiral
bevel gears.
3. Noise level is very important for spiral bevel gears.
4. Hypoid gears have large shaft offset.
5. Straight bevel gears resemble worm gears.
6. Enlarge your vocabulary. Find word combination in the text which
means the following:
уровень шума; неважное обстоятельство; использовать ту же самую
методику; пересекающиеся валы; зубцы могут быть отлиты;
допустимый; зазор; вершина; иметь много общего; относительно
маленькое смещение вала; подстрочный индекс; обычно; в
небольших количествах; за исключением; передавать движение.
7. Work in pairs. Make up a dialogue about different kinds of bevel gears.
8. Check your grammar. Insert prepositions given below. Some prepositions
may be used twice.
Spiral bevel gears are recommended _______ higher speeds and where
the noise level is an important consideration. Spiral bevel gears are the bevel
counterpart ______ the helical gear; it can be seen _______ Fig. IV-1 that the
pitch surfaces and the nature _______ contact are the same as ______ straight
bevel gears except the differences brought ________ by the spiral-shaped
teeth.
(for, about, of, in)
9. Complete the sentences using correct Passive Voice of the verbs in
brackets.
1. A straight bevel gear (use) for pitch-line velocities up to 1.000 ft/min.
2. Standard straight-tooth bevel gears (cut) by using 20 pressure angle.
3. Such gears (call) hypoid gears.
4. It (see) that the hypoid gear has a relatively small shaft offset.
5. The definition of the spiral angle (illustrate) here.
6. Bevel gears usually (make) for a shaft angle of 90. They (may, produce)
for almost any angle.

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