Machine Tool Operations
Hand Tools
Objectives:
5.1. Identify
the most commonly used machine shop hand tools.
5.2. Select
the proper hand tool for the job.
5.3. Maintain
hand tools properly.
5.4. Explain
how to use hand tools properly.
Procedure:
1) Carefully
study the chapter, and then answer the following questions in the space
provided.
Questions:
1) A
toolmaker’s vise __________.
a) Can
be rotated to any desired position.
b) Can
be tilted to any desired position.
c) Can
hold small precision parts.
d) All
of the above
e) None
of the above
2) When
placing work in a vise, clamping action can be obtained by __________.
a) Using
the handle to turn the heavy screw.
b) Hammering
the handle with a soft-faced hammer.
c) Increasing
leverage with an additional length of pipe added to the handle.
d) All
of the above
e) None
of the above
3) Placing
strips of ___________________________ the width of the clamp jaw between the
work and the jaws will protect the workpiece from being damaged.
4) The
pliers’ size indicates the ____________.
a) Length
of the handle.
b) Overall
length of the tool.
c) Length
of the jaw.
d) All
of the above.
e) None
of the above.
5) Torque
wrenches are used when _________________.
a) They
fit the nut or bolt better than another wrench.
b) A
threaded fastener must be tightened to specified limits.
c) A
threaded fastener must provide maximum holding power without danger of the
fastener failing.
d) All
of the above
e) Both
b and c.
6)
When should the handle of a torque wrench be lengthened
for additional leverage?
__________________________________________________________________________________________________________________________________________
7)
Should an adjustable wrench be pushed or pulled? Why?
_______________________________________________________________________________________________________________________________________________________________________________________________________________
8) When
using an adjustable wrench, ____________.
a) The
moveable jaw should face the direction the fastener is to be rotated.
b) The
moveable jaw should face the opposite direction the fastener is to be rotated.
c) A
hammer can be used to help loosen a stubborn fastener.
d) All
of the above.
e) None
of the above.
9) The
body or jaw of a ____________ completely surrounds the head or nut.
a) Spanner
wrench
b) Pipe
wrench
c) Box
wrench
d) All
of the above
e) None
of the above
10) Define
torque.
__________________________________________________________________________________________________________________________________________
11) Spanner
wrenches are ____________.
a) Wrenches
with drive lugs.
b) Designed
to turn flush type threaded fittings.
c) Designed
to turn recessed type threaded fittings.
d) All
of the above.
e) None
of the above.
12) List three
basic types of spanner wrenches.
a)
__________________________________________________________________
b)
__________________________________________________________________
c)
__________________________________________________________________
13) There are
many safety precautions that should be observed when using wrenches. List four of them.
a)
__________________________________________________________________
b)
__________________________________________________________________
c)
__________________________________________________________________
d) __________________________________________________________________
14) Identify
the screwdriver tips below.
a) ___________________________
b) ___________________________
c) ___________________________
d) ___________________________
e) ___________________________
f)
___________________________
15) When are
the following chisels used?
a)
Flat:
_____________________________________________________________
b)
Cape:
____________________________________________________________
c)
Round Nose:
______________________________________________________
d)
Diamond Point:
____________________________________________________
16) For long
hacksaw blade life, make sure you use the ___________________________ of the
blade when cutting.
17) Mount the
work solidly and as close to the vise as practical for sawing, otherwise
___________.
a) The
blade will bind and ruin the handle
b) Chatter
and vibration will dull the teeth
c) The
blade may heat up and ruin the teeth
d) All
of the above
e) None
of the above
18) Should a
blade break or dull before completing the cut, you should not continue in the
same cut with a new blade because the ___________.
a) Cut
will be too narrow for the new blade.
b) Cut
will be too wide for the new blade
c) You
should continue in the same cut with a new blade
d) All
of the above
e) None
of the above
19) The number
of teeth per inch of a blade has an important bearing on the shape of the
material being cut. For best results,
three or more teeth should be cutting at all times; otherwise __________.
a) The
teeth will straddle the section being cut and snap off.
b) Great
pressure will be required to make the teeth cut.
c) The
teeth will clog with chips.
d) All
of the above
e) None
of the above
20) Files are
classified by their shape. File shape is
determined by the ____________.
a) Length
and width of the tool
b) Taper
and thickness
c) General
outline and cross section
d) All
of the above
e) None
of the above
21) Files are
also classified by the cut of their teeth.
Identify the cuts illustrated below.
a)
____________________
b)
____________________
c)
____________________
d)
____________________
22) When a file
is pushed or pulled across the work, it is called ____________ filing.
23) Reaming is
done when a hole must be finished accurately and with a very smooth
________________________.
24) A(n)
_________ reamer is used when a hole must be cut a few thousandths inch over
nominal size for fitting purposes.
a) Taper
b) Spiral-fluted
c) Expansion
d) All
of the above
e) None
of the above
25) A(n)
__________ reamer should be used when reaming a hole with a keyway or other
interruptions.
a) Taper
hand
b) Spiral-fluted
c) Expansion
hand
d) All
of the above
e) None
of the above
26) List three
precautions that should be observed when using hand reamers.
a)
___________________________________________________________
b)
___________________________________________________________
c)
___________________________________________________________
27) Three
different taps must be used to thread a blind hole to the bottom. List them in the order they are used.
a)
__________________________________
b)
__________________________________
c)
__________________________________
28) It has been
established that a hole to be tapped must be must be small than the desired
thread diameter. For example: a 5/16”
hole must be drilled for a 3/8-16 UNC thread.
How much larger must a shaft be machined to receive a 3/8-16 UNC
external thread? Why?
_________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
29) Ragged
threads are the most common problem encountered when cutting external threads
with a die. They are caused by
____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
30) An abrasive
is _______.
a) A
soft substance
b) Used
to wear away another material
c) Used
to strengthen metal
d) All
of the above
e) None
of the above