TPC 315 Machine Shop Practice

Question 1

Iron parts are usually made from

Barstock
Castings
Forgings
Sheet

Answer 1

Castings

Question 2

What do the last two digits of the SAE steel code indicate?

Brinell hardness
Percentage of carbon
Percentage of alloy
Weight per foot

Answer 2

Percentage of carbon

Question 3

The ability of a steel to resist cutting and scratching is called

Ductility
Elasticity
Hardness
Strength

Answer 3

Hardness

Question 4

The process that eliminates brittleness in a steel is

Annealing
Case hardening
Cold working
Tempering

Answer 4

Tempering

Question 5

To remove cast iron chips safely from a machine, you should use (a)

Brush
Compressed air
hook
Scraper

Answer 5

Brush

Question 6

What tool should you use to lay out and measure distances?

Dividers
Hemaphrodite caliper
Outside caliper
Template

Answer 6

Dividers

Question 7

To prevent cast iron surface plates from rusting, coat them lightly with

Grease
Oil
Shellac
Wax

Answer 7

Oil 

Question 8

To raise a surface gauge for measuring above its height, support it on (a)

Box parallels
Pair of V-blocks
Right-angle plate
Surface plate

Answer 8

Box parallels

Question 9

The distance between the centers of two adjacent holes on a bolt circle is the

Chord or pitch chord
Diagonal
Diametral pitch
Pitch diameter

Answer 9

Chord or pitch chord

Question 10

You should carry pointed tools in a tote box or in a

Cloth bag
Deep tool box
Drawer-type chest
Pouch fastened to your belt

Answer 10

Pouch fastened to your belt 

Question 11

The part of a lathe that holds the dead center is called the

Tail center
Tail grip
Tailpiece
Tailstock

Answer 11

Tailstock

Question 12

To remove a live center from a lathe, you should tap it with a

Chuck key
Knockout bar
Piece of barstock
Rawhide hammer

Answer 12

Knockout bar

Question 13

What should you use to remove a chuck that screws on a lathe spindle?

Block of wood
Length of chain
Piece of angle iron
Spanner wrench

Answer 13

Block of wood

Question 14

To mount a workpiece on a machine table, you should hold it in a

Chuck
Collet
Hold-down
Vise

Answer 14

Vise

Question 15

A view showing a portion of a part cut away is a

Plan view
Proportion
Section
Sketch

Answer 15

Section

Question 16

The two dimensions of a cylinder are its and its

Diameter …….. length
Diameter ……… radius
Inside ………….. outside diameter
Width…………….. diameter

Answer 16

Diameter………. Length

Question 17

A name for the degree of accuracy needed for a part to function is

Allowance
Fit
Precision
Tolerance

Answer 17

Precision

Question 18

The index line of a micrometer is divided into 40 parts per inch. Each turn of the micrometer thimble moves the spindle

0.004 in.
0.010 in.
0.025 in .
0.040 in.

Answer 18

0.025 in.

Question 19

What does a toolmaker use to check the accuracy of gauges?

Micrometer caliper
Vernier scale
Gauge blocks
Steel rule

Answer 19

Gauge blocks

Question 20

When you grind the end of a high-speed steel tool, the steel

Creates a foul smell
Gives off dark red sparks
Smokes excessively
Turns black

Answer 20

Gives off dark red sparks

Question 21

The surface of the tool shank that supports the cutting tip is the

Base
Face
Land
Rake

Answer 21

Base

Question 22

The proper surface of a wheel to use for grinding high-speed steel tools is the

Edge
Face
Flats
Side

Answer 22

Face

Question 23

What does A represent in a grinding wheel code marked A 60 N 10 V W?

Coarse or fine
Grade or hardness
Type of abrasive
Type of bond

Answer 23

Type of abrasive

Question 24

The process of cleaning up an uneven edge formed by grinding is called

Buffing
Glazing
Honing
Scraping

Answer 24

Honing

Question 25

The metal column that separates the flutes of a drill is called the Helix Land Shank Web

Answer 25

Web

Question 26

The points of most general purpose twist drills have an included angle of degrees 29 59 88 118

Answer 26

118

Question 27

A flaring cup grinding wheel produces a relief that is Concave Convex Flat Tapered

Answer 27

Flat

Question 28

Machine countersinks have an included angle of to degrees 15 ……. 20. 30 …….. 41 45 ……… 62 60 ………. 82.

Answer 28

60……… 82

Question 29

To remove burrs in a machine spindle, you should use a(n) reamer Machine Tapered pipe reamer Tapered Expansion

Answer 29

Tapered

Question 30

For boring operations on a lathe, you should hold the workpiece in a Chuck Collet Hold-down Vice

Answer 30

Chuck