834. Over sized holes in drilling are caused by:
A.Equal lengths of lips
B.Unequal length of lips
C.Larger helix angle
D.Smaller helix angle

---

835. When the cutting lips of a drill are uneven in length, the drill will cut a
A.Larger hole than the drill size
B.Small hole than the drill size
C.Same size hole as the drill size
D.Unpredictable

---

836. The flutes of a drill perform the following function
A.Help form the cutting edge of the drill point
B.Form channels through which the chips can escape from the hole being drilled
C.Allow the coolant and lubricant to get down to the cutting edge
D.All of the above

---

837. For reaming operation in blind hole, following type of reamer should be used
A.Straight flute reamer
B.Right hand spiral fluted reamer
C.Left hand spiral fluted reamer
D.Any one of the above

---

838. Drills are usually made of
A.Plain high-carbon tool steel
B.Alloy steel
C.High-speed steel
D.Tungsten carbide

---

839. For reaming holes with solid reamers, reamer is mounted in
A.A rigid holder
B.A floating holder
C.A semi-rigid holder
D.A collet

---

840. Reamer is always hold in
A.Floating chuck
B.Mandrel
C.Collet chuck
D.Self and centering chuck

---