Manufacturing And Production Technology - Study Mode

[#261] For machining a mild steel workpiece by a high speed steel tool, the average cutting speed is
Correct Answer

(D) 30 m/min

Explanation

Solution: For machining a cast iron workpiece by a high speed steel tool, the average cutting speed is 22 m/min and for a mild steel is 30 m/min

[#262] The specific cutting energy used for establishing the machinability of the metal depends upon its
Correct Answer

(D) All of these

Explanation

Solution: Specific energy in metal cutting, defined as the energy expended in removing a unit volume of workpiece material.
The specific cutting energy used for establishing the machinability of the metal depends upon its
- Coefficient of friction
-Micro-structure
-Work hardening characteristics

[#263] The cutting speed of a drill depends upon the
Correct Answer

(D) All of these

Explanation

Solution: The cutting speed of a drill depends upon the
-Material of drill
-Type of material to be drilled
- Quality of surface finish desired

[#264] The size of abrasive grain required in a grinding wheel depends upon the
Correct Answer

(B) Hardness of material being ground

Explanation

Solution: The size of Abrasive grain required in a Grinding wheel depends on the amount of material to be removed, desired finishing, and the hardness

[#265] Which type of motor is not used in axis or spindle drives of CNC machine tools?
Correct Answer

(C) Stepper motor