NIMS Testing (95% -study)
T/F: A collet offers more runout accuracy than a three-jaw chuck.
True
T/F: A follower rest is bolted to the carriage and travels along the part with the cutting tools.
True
T/F: A lathe dog is needed when holding a workpiece between centers.
True
T/F: Large work is commonly secured to faceplates, which can cause workpiece imbalance if run at high speeds.
True
What engages with the lathe dog to transfer spindle rotation to the workpiece when holding work between centers? A. drive plate B. faceplate C. three-jaw chuck D. spindle taper
A. drive plate
A taper mounted collet adapter can be removed from the spindle using a? A. knock-out bar B. cam-release tool C. pry bar D. drawtube
A. knock-out bar
The main advantage of supporting work and turning between centers is? A. the work can be removed and remounted without losing accuracy B. tool clearance is greatly improved C. eccentric diameters can be easily machined D. none of the above
A. the work can be removed and remounted without losing accuracy
A solid tapered mandrel has approximately how much taper per inch of length? A. .0001 B. .0005 C. .005 D. .010
B. .0005
What is best applied between a tailstock mounted dead center and the workpiece to lessen friction? A. oil B. anti-seize C. lapping compound D. coolant
B. anti-seize
Which of the following workholding devices can be used to hold a workpiece off-center? A. collect chuck B. four-jaw chuck C. three-jaw chuck D. drill chuck
B. four-jaw chuck
The tool used to drill a tapered hole to accept a lathe center is called a? A. countersink B. spot drill C. combination center drill and countersink D. taper-seater
C. combination center drill and countersink
Which of the following workholding devices can be designed so that it can be readily machined to hold a custom sized workpiece? A. flex collet B. lathe centers C. emergency collet D. faceplate
C. emergency collet
Work can be mounted through an existing bore using a special precision cylindrical shaft called a? A. drawbar B. draw tube C. mandrel D. center shaft
C. mandrel
A typical lathe center has an included angle of? A. 82 degree B. 90 degree C. 30 degree D. 60 degree
D. 60 degree
The difference between a steady rest and a follower rest is the? A. third point of contact provided B. position of the rest on the lathe C. mounting location on the machine D. all of the above E. none of the above
D. all of the above
Taper shank holemaking tools can be held? A. in a tailstock mounted drill chuck B. in a rocker-type toolholder C. in a 4-jaw chuck D. directly in the tailstock
D. directly in the tailstock
The main difference between a three-jaw chuck and a four-jaw chuck (beside the number of jaws) is the? A. size of material they can hold B. physical size of the chuck C. jaw tightening screw D. movement of the jaws
D. movement of the jaws
T/F: A square workpiece should be held in a 3-jaw chuck.
False
T/F: A standard universal 3-jaw chuck can repeat to accuracies better than .0005 TIR.
False
T/F: A steady rest is mounted to the carriage of the lathe and moves longitudinally with the carriage.
False
T/F: Collets are available to hold square material.
False
T/F: The jaws on a three-jaw universal chuck move independently.
False
