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Energy In Mechanical/Fluid Systems I
Test Description: Principles of Technology Review : Unit 5 Subunit 1 Energy in Mechanical and Fluid Systems I
Instructions: Answer all questions to get your test result.
1) The law of conservation of energy states that
A
energy may be created, destroyed or transformed.
B
energy may be created, but only in certain types of nuclear reactions.
C
energy may neither be created nor destroyed; it may only be transformed.
D
the energy created by one process must be equal to that destroyed by another process.
2) A high diver steps off a diving platform that is 10 meters above the water. If no air resistance is present, during the fall there will be a decrease in the diver’s
A
total mechanical energy.
B
kinetic energy.
C
gravitational potential energy.
D
momentum.
3) Which of the following is the best example of increasing an object’s potential energy?
A
turning on a flash light
B
compressing a sponge
C
rolling a tire
D
dropping a book
4) The equation E = 1/2mv2 is used to calculate this form of energy.
A
elastic potential
B
kinetic
C
mechanical rotational
D
gravitational potential
5) This type of energy is stored in bonds within the nucleus of an atom; it is also the type of energy released from a fission or fusion reaction.
A
chemical
B
mechanical
C
nuclear
D
thermal
6) This is the random kinetic energy possessed by objects in a material at finite temperature. An object that feels hot has a lot of this.
A
nuclear
B
thermal
C
chemical
D
mechanical
7) The energy transferred by a force to a moving object is called
A
nuclear energy.
B
thermal energy.
C
mechanical energy.
D
chemical energy.
8) Which is an example of gravitational potential energy?
A
an avalanche in progress
B
an auto brake return spring
C
water stored behind a dam
D
a pendulum at the bottom of its swing
9) Gravitational potential energy equals
A
the work done to stretch or compress elastic objects.
B
the work done to move an object in a horizontal direction.
C
the work done to operate an electronic device.
D
the work done to lift an object to a higher position.
10) Which of the following objects does not demonstrates elasticity?
A
a bungee cord
B
a pendulum
C
a balloon
D
a spring scale
*select an answer for all questions
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