Multiple Choice
Mechanical seals are used
A) To prevent vibrations
B) To prevent leakage
C) To reduce friction
D) To balance the equipment
E) None of the above
Correct Answer:
Verified
Correct Answer:
Verified
Q40: Weld spatter is<br>A)A flux<br>B)A filler material used
Q41: In all the following case chips produced
Q42: Necking is<br>A)Preparation of surface for brazing<br>B)Hole drilled
Q43: Cutting speeds for some materials are given
Q44: Trepanning operation is used for<br>A)Producing large holes<br>B)Under
Q45: In centreless grinding, work piece is clamped
Q46: The commonly used material for thermocouples is<br>A)Chromel-copper<br>B)Chromel-alumel<br>C)Platinum-rhodium<br>D)Any
Q47: While machining cast iron generally cutting fluid
Q48: The advantage of electronically operated automatic control
Q49: Straight fluted drills are used for<br>A)Amorphous materials<br>B)Ferrous