MR Phase 1 test 2 Flashcards
Tapper Tap has how many tapper threads
8-10 Threads
Plug Tap has how many Tapper Threads
3-5 Threads
Bottoming Tap has how many Tapper Threads
1- 1 1/2 Threads
When Removing a broken bolt with vise-grip pliers, what is the first thing you do?
Soak it with penetration oil
Due to rusting, a Broken bolt cannot be removed with vise-grip pliers, or wit ha prick or center much. What method would you sue?
Drill out method
When Drilling out and retapping, what part of the broken bolt should you drill?
The center of it
What size tap extractor should be use for a 1/4” tap that has been broken? ( use Drawing 1.9-3)
Extractor 1 (5/64) extractor 2 (7/64)
you are to drill out a broken off sud with a size of 7/16”-14 unc in a valve body and retap the hole. What is the reduced tap drill size? (RTDS=[MD-(1/N)]-(1/64”)
0.35044 (USE THE CHART WE HAD IN CLASS TO GET THE LETTER OF THE DRILL TAP SIZE
you are to drill out a broken off bolt with a size of 1/2”-13 unce in a bearing housing and reap the hole calculate the reduced tap drill size.
.40795
You are informed by your shop supervisor that the toolrests onthe grinders in your shop area are out of adjustment. What is the safe maximum distance between the toolrest and the grinding wheel?
1/8 inch
Your shop acquires a new grinder that in not equipped it safety flanges. What should the outside diameter of the flanges be?
1/3 of the wheel diameter, maximum
A new Grinding wheel is received from the supply department without blotters. you are givien the task of making the necessary blotters, so the wheel can be put to use. How large shoudl the outside diameter of the blotter material be?
As large as the safety flange
the blotter material used is to be rubber. What is recommend thickness of the material?
0.125 inch
What part is designed to provide protection for the side of the grinding wheel and the end of the main shafts?
end plates
What part protects the grinding wheel as well as the machinist from injury?
Wheel Guard
