CUTTING TOOLS AND OPERATIONS MCQ 4
1) A grinding wheel marked with ‘C’ is made with the abrasive
Aluminium oxide
Silicon carbide
Corundum
Diamond
Correct Answer (B)
2) As per Indian Standards the grain size ‘46’ comes under the group
very fine
fine
coarse
medium
Correct Answer (D)
3) As per Indian Standards the ‘M’ grade of grinding wheel comes under the group
very hard
hard
soft
medium
Correct Answer (D)
4) The symbol conventionally used for resinoid bond is
‘R’
‘E’
‘B’
‘V’
Correct Answer (C)
5) A grinding wheel is marked : 51 A 46 L 5 V —23. Here what does 5 denote?
Kind of bond
Kind of abrasive
Structure
Grain size
Correct Answer (C)
6) Balancing of wheel is done to
make the sides of the wheel parallel
make the outside diameter concentric with the bore
equalize the weight in every position of the wheel
none of the above
Correct Answer (C)
7) Grinding fluids are used to
reduce the friction between the wheel face and the job
wash away chips
prevent loading of wheel
all of the above.
Correct Answer (D)
8)Taps are re-sharpened by grinding ……………
relief
flutes
threads
diameter
Correct Answer (B)
9) The tapping hole should be …………………..
larger than the tap size
smaller than the tap size
equal to the tap size
equal to the core (minor) diameter of the tap
Correct Answer (D)
10) A rough file is used ………………….
to reduce the metal rapidly
on irregular jobs
it smooth file is not available
on wood
Correct Answer (A)
11) Tap water is NOT preferred as coolant white drilling. What is the reason for this?
Quick evaporation of water
Danger of corrosion
Insufficient cooling effect
Decrease in cutting action of drill
Correct Answer (B)
12) A die is ……………..
internal thread cutting tool
external thread cutting tool
acme thread cutting tool
square thread cutting tool
Correct Answer (B)
13) A groove is being chipped by a chisel. How will you avoid the metal breaking off as a lump, when reaching the end of the groove?
By using soluble oil
By holding the chisel with less inclination
By chipping the end portion from opposite side.
By chipping with light force when reaching the end
Correct Answer (C)
14) You have to cut an aluminium block to smooth finish. Which one of the following cut of file is most suitable? *
4 points
Rasp cut
Double cut
Single cut
Circular cut
Correct Answer (C)
15) For Cylindrical grinding a small diameter work with fairly large wheel, which among the following grades of wheel should be used?
Very soft
Medium
Hard
Soft
Correct Answer (C)
16) The teeth of hacksaw blade are set to
provide clearance for the blade
prevent jamming and breakage of blade
make the kerf wider than the blade
all of the above
Correct Answer (D)
17) Which one the following drilling machines is used for drilling holes where electricity is not available?
Pillar drilling machine
Ratchet drilling machine
Bench drilling machine
Radial drilling machine
Correct Answer (B)
18) Which of the following reamers is particularly suitable for reaming holes having keyway grooves?
Helical fluted reamer
Pilot reamer
Straight fluted reamer
Taper reamer
Correct Answer (A)
19) Which one of the following is NOT the cause for glazing of wheel ?
Hard wheel in place of soft wheel
Feed rate is too fine
Improper dressing of wheel
Dirty coolant
Correct Answer (C)
20) The effect of using a glazed or loaded wheel is
more heat generation
poor surface finish
excessive cutting pressure between the wheel face and the work surface
all the above
Correct Answer (B)
21) Which among the following is NOT the cause for loading of grinding wheel?
Proper grain size and grade of wheel.
Wheel speed more than recommended
Feed too fine
Dense structure
Correct Answer (A)
22) Which one the following reamers can adjust itself in case of slight misalignment when fitted on a tailstock?
Floating reamer
Parallel reamer
Adjustable reamer
Taper reamer
Correct Answer (A)
23) How does a hand reamer differ from a machine reamer?
Larger bevel lead for the cutting edges
More number of cuffing teeth
Less number of cutting teeth
Unequal spacing of cutting edges
Correct Answer (A)
24) It is commonly observed that the face of a grinding wheel becomes shiny and smooth or glazed after some use due to one of the following reasons.
Grade of wheel is too hard
Abrasive of wheel is not suitable for the purpose
Grain size is too coarse
Structure of the wheel is too open
Correct Answer (A)
25) What is the cause of a grinding wheel becoming glazed in a grinding machine?
Feed and traverse are less
Grinding wheel’s grade is too soft
Grinding wheel’s grade is too large
Grinding wheel’s speed is too high and work speed is low
Correct Answer (D)
