This set of Machine Dynamics Multiple Choice Questions & Answers (MCQs) focuses on “Programme for Four Bar Mechanism”.
1. With reference to NC machines, which of the following statements is wrong
a) Both closed-loop and open-loop control systems are used
b) Paper tapes, floppy tapes and cassettes are used for data storage
c) Digitizers may be used as interactive input devices
d) Post processor is an item of hardware
2. In a point-to-point type of NC system
a) Control of position and velocity of the tool is essential
b) Control of only position of the tool is sufficient
c) Control of only velocity of the tool is sufficient
d) Neither position nor velocity need to be controlled
Explanation: Point to point is also sometimes called a positioning system. In PTP the objective of the machine tool control system is to move the cutting tool to predefined location. The speeder path by which this movement is accomplished is not important in point to point NC. Once the tool reaches the desired location, the machining operation is performed at that position.
3. GUI is the acronym for Graphical User Interface.
4. The heart of a computer is:
Explanation: Keyboard is input device, monitor is output device.
5. The widely employed computer architecture for CAD/CAM applications is:
a) Mainframe-based system
b) Minicomputer-based system
c) Microcomputer-based system
d) Workstation-based system
Explanation: Workstation based system is widely used for CAD/cAM architecture.
6. Keyboard is a ___________ input device.
d) All of the mentioned
7. Locating devices are classified as:
a) Text input devices
b) Graphics input devices
c) Both a and b
d) None of the mentioned
8. Mouse is a __________ type of input device.
d) All of the mentioned
Explanation: Through mouse we locate the required data or information.
9. Light pen is a:
a) Writing device
b) Drawing device
c) Locating device
d) Lighting device
Explanation: Light pen is used to draw on screen.
10. Digitizer is constructed on the basis of:
a) Magnetic tablet mechanism
b) Acoustic tablet mechanism
c) Optical tablet mechanism
d) both (a) and (b)
Explanation: The Digitizer is a completely separate component than the LCD, although the LCD and Digitizer are usually fused together during manufacturing with an optical adhesive.
Sanfoundry Global Education & Learning Series – Machine Dynamics.
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