Test Flashcards
When operating machine tools. What is not a good safely rule?
Always wear gloves
What is not a good shop safety rule?
Always use compressed air with ordinary air nozzle to clean machinery or
clothing.
Name four advantages to circular saws.
a.
Produce a burr free finish
b
Closer tolerances
C.
Produces cuts of extreme accuracy
d
Cutting operation is safe
What are the classifications of metals?
Ferrous and non ferrous
How are broaches classified?
As planing machines
How is the turret lathe different from a machine lathe?
a.
its equipped with a multisided tool holder, to which a number of different cutting
tools are attached
Name the three types of tooth sets for power band saws.
a. Raker set
b. Wavy Set
C. Alternate Set
In what instance would you use lapping operation?
where there is a high degree of precision and surface finish needed
For what purpose would you use a surface grinder?
For final finishing to close dimensions of a part
Name three basic parts of a drill press.
a
base
b.
spindle
C.
work table
d
head
All twist drills have three major parts, what are they?
Shank, body, and the point
What is the purpose of a center punch?
Is used to make an indentation for the drill point at the center to aid the drill in
getting started
What speed (rom) should you turn a 4 inch diameter piece of mild steel in a lathe?
Mild steel is recommended at 145 SFPM.
138
What is not the basic layout tool used for machine shop layout?
Micrometer
High speeds and light feeds are especially recommended for automatic drilling
machines where the holes do not exceed four drill diameters in depth. T/f
True
In practical straight turning between centers, the cutting edge of the tool should be set about _____ above center
5 degree
What does the following acronyms mean?
UNC
UNF
UNEF
Unified national course
Unified national fine
Unified national extra fine
The pitch of screw thread is the distance from a point on a screw thread to the
corresponding point on the adjacent thread. T/f
True
For right-hand threads, the carriage must travel toward the tailsotck T/f
False
The normal angle for the point of a twist drill should be:
118 degrees
The steady rest, also called a center rest, is used to support_____ work pieces for turning and boring operations.
Long
What is the most widely used method of machining a taper on the engine lathe?
Using a taper attachment
The knee and column milling machine is used more frequently in tool and die shops than any other type. T/f
True
Into what two classes are the knee and column machines divided?
Horizontal or vertical
Accuracy and durability of the milling machine depends on it being kept clean and oiled t/f
True
Feed is the term applied to the distance the tool bit advances along the work for each half revolution of the lathe spindle T/f
False
There are two major types of grinding
Precision and non precision
Surface grinders are used in the grinding of precision parts. T/f
True
What does the acronym CNC mean with regards to robotic machining?
Computer Numerical Control
. A drilling machine comes in many shapes and sizes, from small hand-held power
drills to bench mounted and finally floor-mounted models. T/f
True
Name four basic parts of the engine lathe.
a. Ways
b.
Tailstock
C.
Compound rest
d.
Apron
Turret lathes are classified as either horizontal or
Veritical
Twist drills are usually made from carbon steel or high-speed steel. T/f
True
The roughing tool is used to remove most of the metal on the work piece. T/f
True
The work piece should always be firmly fastened to the table or base to produce holes that are located accurately. T/f
True
One of the most important factors in successful band swing is a proper cutting speed t/f
True
What RPM should’ an engine lathe run when turning a 6 in dlameter piece of
aluminum? Aluminum cutting speed is 200.
127
What (rpm) speed should you turn a 1 1/2 inch diameter piece of copper in a lathe?
Copper is recommended at 400 SFPM.
1018
What would be the correct speed (rpm) for a ¾”drill to drill cast iron? Cast iron
cutting speed is 80.
407
List three of the mounting methods used with a milling machine
- On the table
- In a chuck, or on fixtures
- On an arbor
Between centers
On fixtures
Why is sharpening a milling machine cutter so important?
- A dull cutter wears more rapidly
- A dull cutter does not last as long
Name three types of lathes generally used in high production, heavy-duty work
- Turret lathes
- Multiple tool lathes
- Multiple spindle lathes
Why should you not hold work by hand when drilling?
The work could bind and twist causing injury to your hand
What is the most important safety rule of all while machining?
Wearing eye protection
What is a drill drift used for?
Removing twist drills, sleeves and sockets
T/F High speeds and light feeds are especially recommended for automatic drilling machines where the holes do not exceed four drill diameters in depth.
True
A taper or bevel at the end of a hole is
Countersinking
What designates the size of maximum diameter of the work that can be machined in a lathe?
Swing
What are the 3 types of lathes generally used in high production and heavy duty work?
Turret
Multi-tool
Multi-spindle
What part of a lathe is where the entire unit that moves lengthwise along the ways
between headstock and tailstock called?
Carriage
What is the most accurate means of chucking a work piece in a lathe?
Four jaw
What is used to machine the ends of the work and to machine shoulders in the work?
Facing tool
Use a dial indicator to set up a_____ Chuck
Four jaw
What raises work to drill through material without damaging a vise or table?
Parallels
