1. What is the primary function of a jig in manufacturing processes?
a) To hold and support the workpiece
b) To shape the workpiece
c) To measure the workpiece
d) To cool the workpiece
Answer: a) To hold and support the workpiece
Explanation: Jigs are primarily used to hold and support the workpiece securely in place during machining or assembly operations, ensuring precise and accurate manufacturing processes.
2. Which locating method relies on the use of pins, holes, or slots for accurate positioning of the workpiece?
a) Mechanical locating
b) Optical locating
c) Magnetic locating
d) Hydraulic locating
Answer: a) Mechanical locating
Explanation: Mechanical locating involves the use of physical features such as pins, holes, or slots to accurately position the workpiece in a jig or fixture.
3. What is the purpose of a drill bush in a drilling jig?
a) To guide the cutting tool
b) To cool the workpiece
c) To provide electrical insulation
d) To lubricate the drilling operation
Answer: a) To guide the cutting tool
Explanation: A drill bush is a hardened and precisely machined component used in drilling jigs to guide the cutting tool, ensuring accurate hole placement and alignment.
4. Which type of fixture is specifically designed for holding and supporting workpieces during milling operations?
a) Drilling fixture
b) Grinding fixture
c) Milling fixture
d) Broaching fixture
Answer: c) Milling fixture
Explanation: Milling fixtures are designed with features tailored to securely hold and support workpieces during milling operations, ensuring accuracy and efficiency.
5. What is the primary function of indexing devices in assembly fixtures?
a) To secure the workpiece
b) To rotate the workpiece to specific angles
c) To measure the workpiece
d) To cool the workpiece
Answer: b) To rotate the workpiece to specific angles
Explanation: Indexing devices in assembly fixtures allow for precise rotation of the workpiece to specific angles, facilitating accurate assembly processes involving multiple components.
6. Which clamping device exerts force through the action of hydraulic pressure?
a) Screw clamp
b) Wedge clamp
c) Hydraulic clamp
d) Pneumatic clamp
Answer: c) Hydraulic clamp
Explanation: Hydraulic clamps use hydraulic pressure to exert force, securely holding workpieces in place during machining or assembly operations.
7. In which type of jig or fixture would you typically find a guide bush?
a) Drilling jig
b) Milling fixture
c) Grinding fixture
d) Broaching fixture
Answer: a) Drilling jig
Explanation: Guide bushes are commonly used in drilling jigs to guide the cutting tool and ensure accurate hole placement and alignment.
8. Which principle of location relies on the use of references or surfaces for accurate positioning of the workpiece?
a) Mechanical locating
b) Optical locating
c) Magnetic locating
d) Datum locating
Answer: d) Datum locating
Explanation: Datum locating involves the use of references or surfaces on the workpiece for accurate positioning within a jig or fixture.
9. What is the purpose of an indexing jig in manufacturing processes?
a) To measure the workpiece
b) To hold and support the workpiece
c) To rotate the workpiece to specific angles
d) To cool the workpiece
Answer: c) To rotate the workpiece to specific angles
Explanation: Indexing jigs are used to rotate the workpiece to specific angles, facilitating machining or assembly processes requiring precise orientation.
10. Which type of fixture is specifically designed for holding and supporting workpieces during grinding operations?
a) Drilling fixture
b) Milling fixture
c) Grinding fixture
d) Broaching fixture
Answer: c) Grinding fixture
Explanation: Grinding fixtures are specialized fixtures designed to securely hold and support workpieces during grinding operations, ensuring precision and surface finish quality.