Practice Test: Question Set - 07
1. Dressing and truing of a grinding wheel are
- (A) Exactly the same operation
- (B) Done with the same equipment
- (C) Done only for coarse grinding wheels
- (D) Only for form grinding wheels
2. The drill sleeves or sockets are available with Morse taper and their number range MT-1 to MT-6. Which one of the following drill sizes refers to MT-4?
- (A) Drills above 14 mm up to 23 mm
- (B) Drills above 23 mm up to 31.75 mm
- (C) Drills above 31.75 mm up to 50.50 mm
- (D) Drills above 50.50 mm up to 76 mm
3. Both sides of a flat bastard file have
- (A) No Cut
- (B) Single cut teeth
- (C) Double cut teeth
- (D) Wavy teeth
4. Drill sleeve is used when the taper shank of the drill is
- (A) Smaller than the machine spindle
- (B) Larger than the machine spindle
- (C) Equal to the machine spindle
- (D) None of the above
5. For grinding carbide materials
- (A) Aluminium oxide wheel is used
- (B) Silicon carbide wheel is used
- (C) Diamond wheel is used
- (D) Corundum wheel is used
6. A grinding wheel is marked: 51 A 46 L 5 V -23. Here what do 5 denote?
- (A) Kind of bond
- (B) Structure
- (C) Kind of abrasive
- (D) Grain size
7. Which among the following is NOT the cause for loading of grinding wheel?
- (A) Dense structure
- (B) Feed too fine
- (C) Wheel speed more than recommended
- (D) Proper grain size and grade of wheel
8. After threading a hole by a tap, it was found that the crest of thread was not formed throughout. Which one of the following reasons would have caused this defect?
- (A) Insufficient coolant supply
- (B) Broken the tip of cutting edge of the tap
- (C) Hole size slightly less than the tap drill size
- (D) Hole size slightly more than the tap drill size
9. Which of the following is NOT true with reference to negative rake angle of a lathe cutting tool?
- (A) Makes tool blunt
- (B) Increases the strength of the tool
- (C) Causes higher temperature
- (D) Reduces friction
10. Which one of the following coolants is used for reaming aluminium workpiece?
- (A) Kerosene
- (B) Water
- (C) Air pressures
- (D) Lard oil
11. The relief angle given behind the cutting lips is called
- (A) Lip clearance angle
- (B) Helix angle
- (C) Rake angle
- (D) Chisel edge angle
12. The angle of drill grinding gauge is
- (A) 59°
- (B) 118°
- (C) 121°
- (D) 124°
13. As per Indian Standards the 'M' grade of grinding wheel comes under the group
- (A) Soft
- (B) Medium
- (C) Hard
- (D) Very Hard
14. The teeth of hacksaw blade are set to
- (A) Provide clearance for the blade
- (B) Prevent jamming and breakage of blade
- (C) Make the kerf wider than the blade
- (D) All of the above
15. The suitable cutting fluid for drilling M.S. plate is
- (A) Soluble oil
- (B) Water
- (C) Compressed air
- (D) Dry
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