Copy #: 14- MFET 4210 Midterm Examination Part I: Multiple Choice Instructions:

Question

Copy #: 14- MFET 4210 Midterm Examination Part I: Multiple Choice Instructions: Read each item carefully. Select the best response and mark the appropriate letter on the Scan-Tron sheet. You may mark on this examination booklet I. Given the following block G99 G84 Z-1.15 P1000 R.1 F.25 LO What is incorrectly specified A. F.25 B. Z-1.15 C. D. G84 E. P1000 None of the above 2. Given the following block G81 G98 F2.3 Z-3. LO; What is incorrectly specified: A. G81 B. F2.3 D. LO E. None of the above According to the text author, which type of drill is designed to machine a hole from the solid in one pass without the need for either center drilling or multiple pass drilling to gradually enlarge the hole size: A. Coolant-fed drill B. Spade drill C. Indexable insert drill D. Both A and B E. Both B and C 3. 4. What mode must the Fanuc 10M controller be in to manually insert a new program: A. MEM B. MDI C. EDT D. MRDY E. BDT

Explanation / Answer

1. P1000 IS INCORRECT ANSWER.

G99 = REFERANCE PLANE RETURN

G84 = TAPPING PROGRAM CODE.

Z1.15 = POSITION OF BOTTOM OF HOLE.

R1 = RAPID POSTION TO R PLANE.

F2.5 = FEED IS GIVEN IS REQUIRED FOR TAPPING PROGRAM

2. L0 IS INCORRECT.

G81 = DRILLED CANNED CYCLE

G98 = DRILL WILL RETURN TO INITIAL LEVEL.

F2.3 = FEED IS GIVEN IS REQUIRED FOR DRILLING PROGRAM.

Z3. = POSITION OF BOTTOM OF HOLE DEPTH.

3. BOTH B AND C

SPADE DRILL = A chip curl is ground along the cutting edges to break the chips as they form. Chip breaker grooves direct the small, narrow metal chips out of the hole so you can complete the hole in one pass. The efficient removal of chips also keeps the spade drill more rigid, improving drill performance and precision

INDEXABLE INSERT DRILL =

4. MDI

The MDI panel is Used for typing / editing a program and also for entering data for changing the software settings (such as setting system parameters for the over travel limits,etc.) of the machine

One can type a new program or edit an existing program directly on the MDI (Manual data input) panel of the machine in the EDIT mode.

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