Measuring Tools And Systems

Question 1

What did Ford, General Motors, and Chrysler began to use in 1975?

Answer 1

They began to use metric fasteners in some locations on their vehicles. In fact, all vehicles today use metric fasteners.

Question 2

What is the Metric System?

Answer 2

The Metric System is the international System (SI) of measurement.

Question 3

What is the basis of the Metric System?

Answer 3

The basis of the Metric System is the meter, which is 39.37 inches long. It is slightly longer than a yard.

Question 4

What is the Metric measurement of volume?

Answer 4

The metric measurement of volume is the liter.

Question 5

What is a liter?

Answer 5

A liter is the quantity of liquid that will fill a cube 1/10 of a meter long on each edge. (A liter is slightly larger than a quart.)

Question 6

How many cubic inches are in 1 liter?

Answer 6

There are 61.02 cubic inches in 1 liter.

Question 7

Why is a 2,000 cc engine also called a 2-liter engine? (CC- cubic centimeters)

Answer 7

Because 1 liter is equal to 1,000 cubic centimeters.

Question 8

What is the Metric unit of weight?

Answer 8

The metric unit of weight is a gram, that’s the amount of water it takes to fill a cube that is 1/100 of a meter log in each side. (A thumbtack also weights about one gram)

Question 9

What is the most common use of a gram?

Answer 9

The kilogram is the most common use of a gram, it equals to about 2.2 pounds.

Question 10

How much cc of water is equal to a kilogram?

Answer 10

1,000 cc of water weighs to 1 kilogram.

Question 11

What is the Metric system equivalent to?

Answer 11

The metric system is equivalent to pounds per square inch (psi).

Question 12

What is pounds per square inch (psi) expressed as?

Answer 12

Pounds per square inch (psi) is expressed as kilograms per square centimeter. (Both of these measurements are used in measuring atmospheric pressure at sea level).

Question 13

How many bars is atmospheric in the metric system?

Answer 13

Atmospheric pressureisbone BAR in the metric system (1 kilogram per square centimeter).

Question 14

What is the atmospheric pressure in English system called?

Answer 14

The atmospheric pressure in the English System is called one atmosphere (14.7 psi).

Question 15

What temperature does water freeze and boil on the Fahrenheit scale?

Answer 15

On the Fahrenheit scale water freezes at 32 and boils at 212.

Question 16

In the metric system how is temperature measured?

Answer 16

Temperature is measured in degrees centigrade in the metric system. It’s most often expressed as degrees Celsius.

Question 17

In the Celsius scale, at what temperature does water freeze and boil at?

Answer 17

On the Celsius scale, water freezes at zero degrees Celsius (0C) and boils at 100C.

Question 18

In the English System what are torque readings expressed in?

Answer 18

Torque readings are expressed in foot-pounds in the English System.

Question 19

What is the Metric equivalent expressed in?

Answer 19

The metric equivalent is expressed in Newton-meters.

Question 20

What number is the Metric System based on?

Answer 20

The metric system is based on the number 10.

Question 21

How much is 1/100 (0.01) of meter in centimeters?

Answer 21

1/100 (0.01) of a meter is a centimeter.

Question 22

How much meters is a kilometer?

Answer 22

1,000 meters is a kilometer.

Question 23

How much is 1/1000 (0.001) of a meter in millimeter?

Answer 23

1/1000 (0.001) of a meter is a millimeter.

Question 24

How much 0.25 mm equal to in inches?

Answer 24

0.25 mm equals to 0.010 in.

Question 25

What is 0.72 mm oversize piston in inches?

Answer 25

A 0.75 mm oversized piston is 0.030 in. Oversize.

Question 26

What is a 0.50 underside crankshaft bearing in inches?

Answer 26

An undersized crankshaft bearings of 0.50 mm are 0.020 in. Undersize in the inch System.

Question 27

How do you convert millimeters and inch value back and forth?

Answer 27

To convert millimeters and inch value multiply by 25.4 when the inch value is known, and divide by 25.4 when the metric value is known.

Question 28

What is the common steel rule?

Answer 28

The common steel rule is to make approximate measurements.

Question 29

What are two handy tools to help you out.

Answer 29

Two popular tools are a tape measure, and the pocket-style 6 in. Steel rule.

Question 30

What may be used with dividers or calipers to help transfer measurement.

Answer 30

Rulers may be used with dividers and calipers to transfer measurements.

Question 31

What are thickness gauges (feeler gauges) often used for?

Answer 31

Thickness gauges (feeler gauges) are often used to measure valve clearance, piston ring side clearance, crankshaft end play, and the gaps of spark plugs, piston rings, and ignition points.

Question 32

What should you feel when measuring clearance with a feeler gauge?

Answer 32

You should feel a slight drag when measuring clearance with a feeler gauge when it is moved through the area of clearance.

Question 33

How do you know the correct measurement had been made when using a feeler gauge.

Answer 33

When using a feeler gauge that is 0.001 in. Thicker will not fit into the gap, that is when you know the correct measurement has been made.

Also called a go/no-go

Question 34

What is plastigage?

Answer 34

Plastigage is used to measure oil clearance in bearings and oil pumps.

Question 35

How does plastigage work?

Answer 35

Plastigage works by using a strip of plastic that deforms when crushed, the deformed plastic give us an idea of the amount of clearance.

Question 36

When was the vernier caliper developed?

Answer 36

The vernier caliper was developed in the seventeenth century.

Question 37

How does a vernier caliper work?

Answer 37

The vernier caliper measured the outside diameter (O.D) and inside diameter (I.D) from 0 to 7 inches in thousandths or an once or from 1 to 180 millimeters.