Note: Please see attachment for more clarification TQME 1: Maintainability Engineering 1. State...

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Note: Please see attachment for more clarification TQME 1: Maintainability Engineering  1.   State four important and distinct equipment condition monitoring technologies used in predictive maintenance (condition-based maintenance)  2.   State four important causes of vibration in rotating machinery. Each of the causes must be distinguishable as a function of the shaft rotating speed.  3.  Explain the principle of pulse-echo ultrasonic testing of a metallic block specimen. Use a figure to illustrate the method and state how a defect at a location within the block can be detected by this approach.  4.  What is the most common type of transducer material used in an ultrasonic probe?  5. The graph below shows vibration signal (measured by an accelerometer placed vertical to the shaft axis) frequency spectrum characteristic of a ball bearing. (frequency is in ‘order’)   i. _____ Pointer 1 on the figure indicates A. Parallel misalignment  B. Imbalance  C. Ball bearing defects.  D. Looseness   ii. _____ Pointer 2 on the figure indicates A. Angular misalignment  B. Parallel misalignment  C. Imbalance  D. Looseness  iii. _____ Pointer 3 on the figure indicates A. Looseness  B. Ball bearing defects  C. Parallel misalignment  D. Angular misalignment    iv. _____ Pointer 4 on the figure indicates A. Looseness  B. Combined angular and parallel misalignment  C. Ball bearing defect frequencies 
	
Document Preview: TQME 1: Maintainability Engineering State four important and distinct equipment condition monitoring technologies used in predictive maintenance (condition-based maintenance) State four important causes of vibration in rotating machinery. Each of the causes must be distinguishable as a function of the shaft rotating speed.Explain the principle of pulse-echo ultrasonic testing of a metallic block specimen. Use a figure to illustrate the method and state how a defect at a location within the block can be detected by this approach.What is the most common type of transducer material used in an ultrasonic probe?The graph below shows vibration signal (measured by an accelerometer placed vertical to the shaft axis) frequency spectrum characteristic of a ball bearing. (frequency is in ‘order’)      i. _____ Pointer 1 on the figure indicates A. Parallel misalignment B. Imbalance C. Ball bearing defects. D. Looseness ii. _____ Pointer 2 on the figure indicatesA. Angular misalignment B. Parallel misalignment C. Imbalance D. Loosenessiii. _____ Pointer 3 on the figure indicates A. Looseness B. Ball bearing defects C. Parallel misalignment D. Angular misalignment iv. _____ Pointer 4 on the figure indicates A. Looseness B. Combined angular and parallel misalignment C. Ball bearing defect frequencies D. Thermal defects45. _____ Pointer 4 on the figure indicates A. Looseness B. Combined angular and parallel misalignment C. Ball bearing defect frequencies D. Thermal defects

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TQME 1: Maintainability Engineering 
1. State four important and distinct equipment condition monitoring technologies used in 
predictive maintenance (condition-based maintenance) 
Four important and distinct equipment condition monitoring technologies used in predictive 
maintenance are: 
1. Acoustic analysis.  
2. Motor analysis technique.  
3. Motor operated valve testing. 
4. Thermography 
2. State four important causes of vibration in rotating machinery. Each of the causes must 
be distinguishable as a function of the shaft rotating speed. 
Four important causes of vibration in rotating machinery are as following: 
1. Imbalance - A "substantial spot" in a rotating part will bring about vibration when the 
unbalanced weight rotates around the axis of machines, making a radial force. Imbalance could 
be brought on by assembling absconds (machining errors, casting defects) or any maintenance 
issues (distorted or dirty fan blades, missing parity weights). 
2. Misalignment/shaft runout - Vibration can come about when machine shafts are out of line. 
Angular misalignment happens when the axis of an engine and pump are not parallel. If the axis 
are parallel however not precisely adjusted, the condition is known as parallel misalignment. 
Misalignment can be brought on during assembly or development over time, because of thermal 
expansion, component shifting or improper reassembly after its maintenance. 
3. Wear - As components like ball or roller course, drive belts or gears get worn, they may bring 
about vibration. At the point when a roller bearing race ends up plainly hollowed, for example,

Note: Please see attachment for more clarification TQME 1: Maintainability Engineering 1. State four important and distinct equipment condition monitoring technologies used in predictive maintenance...

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