Test

Question 1

Element for Gold

Answer 1

Symbol-Au
Atomic weight- 197
Specific gravity- 19.32@17.5 C

Question 2

Elements are-

Answer 2

When like atoms bond together chemically, they form a molecules of an element.

Question 3

Compounds-

Answer 3

A compound is any substance whose molecules are composed of unlike atoms.

Water is a compound because the molecules are composed of two kinds of atoms, hydrogen and oxygen.

Question 4

Mixtures

Answer 4

When two different elements or compounds are mixed together and the molecules do not combine chemically, the substance is known as a mixture.

Question 5

States of matter

Answer 5

Is determined by two things, it’s temperature and it’s pressure

Question 6

Molecules of solids

Answer 6

As they are heated, their activity or molecules speed is increased

Question 7

Absolute Zero

Answer 7

When a substance gets so cold that it’s molecules would cease to move, it could not get any colder.

Question 8

Two kinds of energy

Answer 8

Potential energy- that due to the position of a mass

Kinetic energy- that due the motion of a mass

Question 9

The rate at which work is done is called

Answer 9

Power

Question 10

There are two kinds of velocity

Answer 10

Constant and veriable

Question 11

The force or shock which results when the movement of a confines liquid is suddenly arrested or accelerated.

Answer 11

Water hammer

Question 12

The Six Simple Machines

Answer 12

Lever
Inclined plane
Wedge
Screw
Wheel and axle
Pulley

Question 13

Levers of the third class

Answer 13

Multiply speed or distance, rather than force.

Question 14

If the wheel is driving the axle, there is a loss in mechanical advantage of speed because

Answer 14

The driving belt is traveling faster and farther than the driven belt on the axle

Question 15

On a simple machine

Answer 15

It is impossible to gain both force and speed at the same time.

Question 16

Gears serve four-fold purpose:

Answer 16

(1) gears transmit positive motion
(2) gears are used to drive a second part or mechanism in the same or opposite direction to that of the motor or other driving force; (3) gears are used to actuate a second gear or part at the same speed, slower or fastest than driver; (4) gears may be used to increase or decrease force

Question 17

With a odd number of gears in a simple gear train.

Answer 17

The driver and the driver gears rotate in the same direction.

Question 18

The length of the slope

Answer 18

Is the effort distance (ED)

Question 19

Screw threads are used

Answer 19

(1) to transmit motion
(2) to apply tremendous force with comparatively little effort
(3) to hold parts together
(4) to obtain measurements

Question 20

Most screw threads are said

Answer 20

to have a definite number of threads per inch.

Question 21

Rate a mass travels in a particular second

Answer 21

Velocity

Question 22

A force that resists motion of tendency to such motion of 2 bodies of substances at contact.

Answer 22

Friction

Question 23

Loss of head pressure at entrance of a pipe

Answer 23

Turbulence

Question 24

Closed space which all air is removed

Answer 24

Vacuum

Question 25

Resistance to flow

Answer 25

Viscosity

Question 26

Force exerted by substance on a unit of area

Answer 26

Pressure

Question 27

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

Answer 27

Flow rate

Question 28

Force of one body onto the other with exert the same of resistance

Answer 28

Inertia

Question 29

Closed conduit to move water from a pump

Answer 29

Penstock

Question 30

Storage of liquid above the plant

Answer 30

Forebay

Question 31

Rate at which velocity of a mass increases with time

Answer 31

Acceleration

Question 32

Density

Answer 32

At of unit per volume

Question 33

Is a comparison of the density of any substance with the density of water

Answer 33

Specific Gravity

Question 34

What tends to change velocity of a mass

Answer 34

Force