Mid-Term

Question 1

When is it safe to leave operating machinery unattended?

Answer 1

Never

Question 2

What is the hazard of rags around moving machinery?

Answer 2

They can pull you in.

Question 3

What state must a machine be in before repairing?

Answer 3

Zero-Energy State.

Question 4

Storage drums must be grounded to avoid which hazards?

Answer 4

Static spark and combustion.

Question 5

A safe pressure for shop airlines is?

Answer 5

30 psi.

Question 6

What shape is a class A fire extinguisher symbol?

Answer 6

Triangle.

Question 7

What shape is a class B fire extinguisher symbol?

Answer 7

Square.

Question 8

What shape is a class C fire extinguisher symbol?

Answer 8

Circle.

Question 9

What shape is a class D fire extinguisher symbol?

Answer 9

Star.

Question 10

Proper lifting requires?

Answer 10

A straight back and leg muscles.

Question 11

A Class A fire could be?

Answer 11

Paper or wood combustibles.

Question 12

A Class B fire could be?

Answer 12

Chemicals/solvents ie. Varsol, grease.

Question 13

A Class C fire could be?

Answer 13

Electrical components.

Question 14

A Class D fire could be?

Answer 14

Metals ie. Magnesium, lithium, etc.

Question 15

What is the typical function of V blocks?

Answer 15

Hold round, square or octagonal stock.

Question 16

Which angles are quickly compared with the square head of a combination set?

Answer 16

45 or 90 degrees.

Question 17

The centre head of a combination set has which included angle?

Answer 17

90 degrees.

Question 18

What is the function of a protractor head in a combination set?

Answer 18

To compare or layout semi-precise angles.

Question 19

Which liquid is used to contrast steel for scribing lines?

Answer 19

Layout blue.

Question 20

What is the function of dividers?

Answer 20

Bisect any angles, scribe arcs and circles, compare layout points.

Question 21

What is the function of trammels attached to a beam?

Answer 21

Layout large arcs and circles.

Question 22

Which method is used to check squares of large layout pieces?

Answer 22

-

Question 23

Why are surface plates used with care?

Answer 23

They maintain a level of accuracy for the shop work.

Question 24

Which is the best material for surface plates?

Answer 24

Granite.

Question 25

What is the purpose of prick punching before machining?

Answer 25

Layout lines are often removed with machining.

Question 26

How is cross filing done?

Answer 26

Using a double cut file for fast removal of material by cross cutting.

Question 27

What is the function of a file card?

Answer 27

To clean a file.

Question 28

Why don’t you use a scale for deburring?

Answer 28

It reduces the accuracy of the scale.

Question 29

How is a micrometer calibrated?

Answer 29

Measure a known distance and adjust the nut using a C Wrench.

Question 30

What is the smallest bore size an inside micrometer can measure?

Answer 30

1.500”

Question 31

One rotation of a metric micrometer thimble advances it how much?

Answer 31

0.50 mm

Question 32

How is a depth micrometer read?

Answer 32

Graduations are reversed from an outside micrometer.

Question 33

What two levels of accuracy can be obtained with a metric vernier micrometer?

Answer 33

0.05 mm - 0.02 mm

Question 34

What level of accuracy can be obtained with a Standard (non-vernier) micrometer?

Answer 34

0.001” (One Thousandth)

Question 35

How many graduations on either side of zero on a bevel protractor?

Answer 35

12

Question 36

How many graduations on the thimble of a metric micrometer?

Answer 36

50

Question 37

How would you compare outside dimensions?

Answer 37

Outside calipers.

Question 38

Layout of angles with a Sine bar and gauge blocks is?

Answer 38

The most accurate method.

Question 39

Which tool is used to measure small diameter holes?

Answer 39

Hole gauges.

Question 40

Calipers and dividers (protractors) are which type of tool?

Answer 40

Comparison.

Question 41

Which tool is used to quickly check accuracy of specific parts?

Answer 41

Fixed gauges (Go/No-go).

Question 42

What is the smallest graduation on a 6” scale?

Answer 42

1/64th of an inch.

Question 43

How is imperial tap drill size calculated?

Answer 43

TDS = D -1/N Major Diameter minus 1/ Number of threads per inch

Question 44

What hand tool is designated second cut?

Answer 44

Machinist file.

Question 45

For safety a cold chisel head should be ground to prevent?

Answer 45

Mushroom head that creates shrapnel.

Question 46

Tap drill size for M8 x 1.25 is?

Answer 46

6.75mm TDS= M - P * Major Diameter minus Pitch

Question 47

What is the ideal tip angle of a flat chisel for steel?

Answer 47

70 degrees. *Less for softer material.

Question 48

In which stroke is moderate pressure applied when filing?

Answer 48

Forward.

Question 49

What material are soft face hammers made of?

Answer 49

-

Question 50

How many teeth of a hacksaw should be in contact at all times?

Answer 50

Minimum of 2, Maximum of 24.

Question 51

Which hand tap is best suited to start a hole?

Answer 51

Taper.

Question 52

Which hand tap is best suited to finish a blind hole?

Answer 52

Bottoming.

Question 53

Which taps are used to cut threads in hard material?

Answer 53

Serial.

Question 54

What material are the hard jaws of a bench vise made of?

Answer 54

Cast steel.

Question 55

The temperature of the workpiece of will affect?

Answer 55

Accurate measurement.

Question 56

Draw filing gives a good finish and can be very accurate if using?

Answer 56

Single cut file, held 90 degrees to the direction of the work.