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MCQ - Mechanical TNPSC JTO
JTO - 534 - Advanced Computer Numerical Control - 534 - Unit VII Routine Maintenance

76)   

In CNC VMC, preventive maintenance for spindle motor includes:

A.
B.
C.
D.
Answer: B
77)   

What is the role of the counterbalance system in a VMC’s Z-axis?

A.
B.
C.
D.
Answer: C
78)   

Failure to change tool in CNC VMC may be due to:

A.
B.
C.
D.
Answer: C
79)   

A flickering machine panel screen in a VMC may indicate:

A.
B.
C.
D.
Answer: A
80)   

What device protects CNC systems from power surge damage?

A.
B.
C.
D.
Answer: B
81)   

Backlash in CNC machines is generally caused by:

A.
B.
C.
D.
Answer: A
82)   

Which of the following is not part of CNC daily maintenance?

A.
B.
C.
D.
Answer: D
83)   

What is the function of the wipers on the slideways?

A.
B.
C.
D.
Answer: B
84)   

Overheating of spindle bearings may be due to:

A.
B.
C.
D.
Answer: B
85)   

What is the ideal action when continuous axis alarms are shown?

A.
B.
C.
D.
Answer: C
86)   

If the coolant is not reaching the tool, what should be inspected first?

A.
B.
C.
D.
Answer: B
87)   

Which maintenance action helps avoid spindle taper damage?

A.
B.
C.
D.
Answer: B
88)   

Air dryer units in CNCs are used to

A.
B.
C.
D.
Answer: B
89)   

What is the common sign of a worn guideway in CNC machines?

A.
B.
C.
D.
Answer: B
90)   

OEM-recommended cleaning of slideway covers is done to:

A.
B.
C.
D.
Answer: B
91)   

OEM warns against using low-grade coolant because it can:

A.
B.
C.
D.
Answer: C
92)   

OEM recommends proper cleaning of the spindle taper using:

A.
B.
C.
D.
Answer: C
93)   

Ignoring the OEM-specified guideway lubrication schedule may result in:

A.
B.
C.
D.
Answer: C
94)   

OEM generally schedules full alignment and calibration checks:

A.
B.
C.
D.
Answer: C
95)   

According to OEM, which parameter must be monitored to avoid servo overload?

A.
B.
C.
D.
Answer: C
96)   

OEM provides torque values for spindle tool holders to:

A.
B.
C.
D.
Answer: B
97)   

OEM recommends draining moisture from air regulators to prevent:

A.
B.
C.
D.
Answer: B
98)   

The OEM manual usually includes which of the following?

A.
B.
C.
D.
Answer: C
99)   

The life of linear motion guideways is extended by following OEM schedules for:

A.
B.
C.
D.
Answer: A
100)   

When replacing spindle bearings, OEM recommends:

A.
B.
C.
D.
Answer: B