NIMS Machining Level I Preparation
Guide Milling Exam Questions 100%
Correct Answers
Surface finish can be measured in - Answers -✔✔ Microinches
Surface finish can be checked with a - Answers -✔✔ Comparison chart
The depth of a 3/8-inch diameter counterbore can best be measured with a - Answers -
✔✔ Depth micrometer
Productions parts are considered rejected when - Answers -✔✔ Dimensions are out of
tolerance
The width of a milled slot, hole diameter or counterbore depth can best be measured
with a/an - Answers -✔✔ Dial caliper
Which of the following criteria determines the choice of a measuring instrument when
checking a dimension? - Answers -✔✔ The tolerance of the dimension being inspected
The process of checking and adjusting a measuring instrument to an acceptable
standard is called - Answers -✔✔ Calibration
The dimension of a hole is stated as 9/16 ± 1/64 inches. Which of the following
statements is true if a 0.584-inch diameter pin slips into the hole? - Answers -✔✔ The
hole is oversize
Which of the following measuring instruments can measure both the depth and diameter
of a counterbore? - Answers -✔✔ Dial caliper
Which of the following describes the safest procedure for measuring a part on the
milling machine? - Answers -✔✔ Stop the machine, deburr, brush chips clear, check
the dimension
Which of the following instruments is used for precision layout? - Answers -✔✔ Dial
indicator height gage and scriber attachment
The included angle on the point of a general purpose drill is - Answers -✔✔ 118°
Identify the appropriate drilling operation for cutting a recess for a socket head cap
screw - Answers -✔✔ Counterboring
, Identify the appropriate drilling operation for cutting a recess for a flat head screw -
Answers -✔✔ Countersinking
Which of the following is the most common drilling practice? - Answers -✔✔ Drilling
holes
To prevent large burrs and a tendency for the drill to grab, a machinist should ________
the spindle pressure when breaking through the material. - Answers -✔✔ Decrease
Which of the following are advantages of drilling on a milling machine instead of drill
press? - Answers -✔✔ The milling machine is capable of greater accuracy, The milling
machine has greater rigidity
Which of the following best describes the procedure for drilling a hole? - Answers -✔✔
Layout, prick punch, center drill, drill, countersink
Identify the center finding device used to line up a center or prick punched hole? -
Answers -✔✔ Cone pointed edge finder
The most commonly used holding device for a drill applied on a vertical mill is a -
Answers -✔✔ Drill chuck
Which metal removal variable has the greatest affect on tool life? - Answers -✔✔
Cutting speed (SFM)
The cutting speed (in surface feet per minute) is determined by - Answers -✔✔ The
type of material being machined
The correct RPM for a 0.750 diameter high speed steel end mill machining O1 tool steel
at 50 sfm is - Answers -✔✔ 266.7 RPM
A right-hand end mill rotates __________ in the spindle and ___________ when viewed
from the front end (cutting edges). - Answers -✔✔ Clockwise, counterclockwise
Feed rates for milling operations are expressed as _________________. - Answers -
✔✔ Inches per minute
Calculate the feed in inches per minute for O1 tool steel with a cutting speed of 55 SFM.
The HSS end mill has a diameter of 0.875 inches with four flutes. The chip load per
tooth is 0.008 inches. - Answers -✔✔ 8.05 IPM
A CNC milling machine uses a feed rate given in inches per revolution (IPR). What is
the feed in inches per revolution for a four fluted end mill with a recommended chip load
per tooth of 0.014 inches? - Answers -✔✔ 0.056 IPR
Guide Milling Exam Questions 100%
Correct Answers
Surface finish can be measured in - Answers -✔✔ Microinches
Surface finish can be checked with a - Answers -✔✔ Comparison chart
The depth of a 3/8-inch diameter counterbore can best be measured with a - Answers -
✔✔ Depth micrometer
Productions parts are considered rejected when - Answers -✔✔ Dimensions are out of
tolerance
The width of a milled slot, hole diameter or counterbore depth can best be measured
with a/an - Answers -✔✔ Dial caliper
Which of the following criteria determines the choice of a measuring instrument when
checking a dimension? - Answers -✔✔ The tolerance of the dimension being inspected
The process of checking and adjusting a measuring instrument to an acceptable
standard is called - Answers -✔✔ Calibration
The dimension of a hole is stated as 9/16 ± 1/64 inches. Which of the following
statements is true if a 0.584-inch diameter pin slips into the hole? - Answers -✔✔ The
hole is oversize
Which of the following measuring instruments can measure both the depth and diameter
of a counterbore? - Answers -✔✔ Dial caliper
Which of the following describes the safest procedure for measuring a part on the
milling machine? - Answers -✔✔ Stop the machine, deburr, brush chips clear, check
the dimension
Which of the following instruments is used for precision layout? - Answers -✔✔ Dial
indicator height gage and scriber attachment
The included angle on the point of a general purpose drill is - Answers -✔✔ 118°
Identify the appropriate drilling operation for cutting a recess for a socket head cap
screw - Answers -✔✔ Counterboring
, Identify the appropriate drilling operation for cutting a recess for a flat head screw -
Answers -✔✔ Countersinking
Which of the following is the most common drilling practice? - Answers -✔✔ Drilling
holes
To prevent large burrs and a tendency for the drill to grab, a machinist should ________
the spindle pressure when breaking through the material. - Answers -✔✔ Decrease
Which of the following are advantages of drilling on a milling machine instead of drill
press? - Answers -✔✔ The milling machine is capable of greater accuracy, The milling
machine has greater rigidity
Which of the following best describes the procedure for drilling a hole? - Answers -✔✔
Layout, prick punch, center drill, drill, countersink
Identify the center finding device used to line up a center or prick punched hole? -
Answers -✔✔ Cone pointed edge finder
The most commonly used holding device for a drill applied on a vertical mill is a -
Answers -✔✔ Drill chuck
Which metal removal variable has the greatest affect on tool life? - Answers -✔✔
Cutting speed (SFM)
The cutting speed (in surface feet per minute) is determined by - Answers -✔✔ The
type of material being machined
The correct RPM for a 0.750 diameter high speed steel end mill machining O1 tool steel
at 50 sfm is - Answers -✔✔ 266.7 RPM
A right-hand end mill rotates __________ in the spindle and ___________ when viewed
from the front end (cutting edges). - Answers -✔✔ Clockwise, counterclockwise
Feed rates for milling operations are expressed as _________________. - Answers -
✔✔ Inches per minute
Calculate the feed in inches per minute for O1 tool steel with a cutting speed of 55 SFM.
The HSS end mill has a diameter of 0.875 inches with four flutes. The chip load per
tooth is 0.008 inches. - Answers -✔✔ 8.05 IPM
A CNC milling machine uses a feed rate given in inches per revolution (IPR). What is
the feed in inches per revolution for a four fluted end mill with a recommended chip load
per tooth of 0.014 inches? - Answers -✔✔ 0.056 IPR
