Welcome to Mr Aslanov’s CEFR lessons – LEVEL B2 Get guaranteed intensive CEFR courses with us!!! Call and join our team now: + 998 94 633 32 30 LEXICAL & GRAMMAR COMPETENCE – TEST 15 How Does Wind Power Really Work? Wind power is going to be essential to our planet in the near future. But do you really know
how wind power works? It looks easy but there are several components involved Q1_______
generating wind power. This type of power can not only save us a good Q2________ of money on
our utility bills, but it will also play an important role in saving our planet. For many of us, wind
just looks invisible and does not actually have any properties but in Q3______, air is a fluid that
contains particles constructed of gas. We can turn these gas particles into power because as the
wind gusts, kinetic energy is created, which then can be harnessed and changed over into power.
Having access to wind is very essential for this operation to work but another indispensable
ingredient is the blades that are used. Their design is very Q4 ______ to the effectiveness of the
turbine. The other important component is simply the size of the blade. The bigger the blade is, the
more energy is seized and more power can be created for us in the form of electricity. Much also
depends Q5_______ where you live to figure out the right blade size. In regions with low wind
levels, small blades work better because more wind is required to push the larger turbine blades. In
an area that is very windy, it is much better to use large blades in Q6 ______ to use all of the wind
available. This gives you the fundamental principles of how electricity is produced from the
wind. Today is a fantastic time to do as much Q7 _______ as you can about wind power so you
will be able to make educated decisions in the future.
Q1. A) at
B) in
C) by
D) from
Q2. A) deal
B) quantity
C) number
D) lot
Q3. A) real terms
B) real life
C) reality
D) realism
Q4. A) valuable
B) significant
C) precious
D) critical
Q5. A) by
B) on
C) from
D) about
Q6. A) effect
B) favour
C) attempt
D) order
Q7. A) discovery
B) investigation C) research
D) search