DOT 1 (14 Jun 21)

Question 1

1.) What is energy?

Answer 1

Capacity to do work.

Question 2

2.) What is Velocity?

Answer 2

The rate a mass travels in a particular direction.

Question 3

3.) What is a mixture?

Answer 3

Molecules that do not mix together in a substance.

Question 4

4.) What is gravity:

Answer 4

Acts in accordance with the laws of freely falling Body.

Question 5

5.) What is water hammer?

Answer 5

Force or shock of a confined fluid

Question 6

6.) What is friction?

Answer 6

A force that resists the relative motion or tendency of such motion of two bodies or substances in contact with one another.

Question 7

7.) What is turbulence?

Answer 7

The loss of head at the entrance of a pipe.

Question 8

8.) What is vacuum?

Answer 8

A closed space at which all air has been removed.

Question 9

9.) What is a compound?

Answer 9

Are unlike atoms that are bonded together chemically.

Question 10

10.) Define viscosity?

Answer 10

Resistance to flow.

Question 11

11.) What is pressure?

Answer 11

The force exerted by a substance on a unit of area.

Question 12

12.) Define power?

Answer 12

The rate at which work is done.

Question 13

13.) Define work?

Answer 13

The overcoming of resistance.

Question 14

14.) What is acceleration?

Answer 14

The rate at which velocity in a mass increases with time.

Question 15

15.) Define flow rate?

Answer 15

The quantity of substance that moves past a point in a given time.

Question 16

16.) What are the six simple machines?

Answer 16

a. ) The lever
b. ) Incline plane
c. ) The wedge
d. ) The screw
e. ) The wheel and axle
f. ) The pulley.

Question 17

17.) What is a molecule?

Answer 17

The smallest division which can be made in a substance and still retain all the properties of the substance.

Question 18

18.) What is a compound?

Answer 18

When unlike atoms are bound together chemically.

Question 19

19.) What is an element?

Answer 19

Composed of like atoms that are chemically bonded.

Question 20

20.) State of matter?

Answer 20

Is determined by two things: temperature and pressure.

Question 21

21.) As molecules of solids increase?

Answer 21

As they are heated, the activity or molecular speed is increased.

Question 22

22.) What is absolute zero?

Answer 22

The temperature at which molecular motion ceases, no lower temperature exists (-460°F).

Question 23

23.) Density?

Answer 23

Total weight divided by volume, one cubic foot of water equals 62.5 pounds.

Question 24

24.) Buoyancy?

Answer 24

Power of matter to be floated by a fluid substance.

Question 25

25.) Specific gravity?

Answer 25

Weight in air divided by weight in air minus weight in water.

Question 26

26.) Gauge pressure?

Answer 26

Referred to as relative or a gauge pressure because it does not take into account the pressure exerted by the atmosphere.

Question 27

27.) Absolute pressure?

Answer 27

Weight of the atmosphere is added to gauge pressure resulting in absolute pressure.

Question 28

28.) vacuum?

Answer 28

Is a closed space from which all air or gases have been removed.

Question 29

29.) Viscosity?

Answer 29

The characteristics of a liquid that denotes the opposition to change in liquid flow of shape.

Question 30

30.) Two types of energy?

Answer 30

a. ) Potential energy: energy that is due to the position of a mass.
b. ) Kinetic energy: Energy that is due to the motion of a mass.

Question 31

31.) Two kinds of velocity?

Answer 31

a. ) Constant velocity: the passing over equal distances in equal intervals of time.
b. ) Variable velocity; The passing over unequal distances in equal intervals.