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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 neither be created nor destroyed; it may only be transformed.
C
the energy created by one process must be equal to that destroyed by another process.
D
energy may be created, but only in certain types of nuclear reactions.
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
gravitational potential energy.
B
total mechanical energy.
C
kinetic energy.
D
momentum.
3) Which of the following is the best example of increasing an object’s potential energy?
A
dropping a book
B
turning on a flash light
C
compressing a sponge
D
rolling a tire
4) The equation E = 1/2mv2 is used to calculate this form of energy.
A
kinetic
B
gravitational potential
C
elastic potential
D
mechanical rotational
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
nuclear
B
mechanical
C
chemical
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
mechanical
B
chemical
C
thermal
D
nuclear
7) The energy transferred by a force to a moving object is called
A
mechanical energy.
B
thermal energy.
C
chemical energy.
D
nuclear energy.
8) Which is an example of gravitational potential energy?
A
water stored behind a dam
B
an auto brake return spring
C
a pendulum at the bottom of its swing
D
an avalanche in progress
9) Gravitational potential energy equals
A
the work done to stretch or compress elastic objects.
B
the work done to operate an electronic device.
C
the work done to lift an object to a higher position.
D
the work done to move an object in a horizontal direction.
10) Which of the following objects does not demonstrates elasticity?
A
a pendulum
B
a balloon
C
a spring scale
D
a bungee cord
*select an answer for all questions
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