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TQEM 2:Digital Signal Processing (DSP)1. _____ Vibration data were acquired during the start-up (increasing speed) ofa steam turbine. This signal isA. Non-stationary with constant frequency as a function of time.B. Stationary with constant frequency as a function of time.C. Stationary with an increasing frequency component as a function of time.D. Non-stationary with an increasing frequency component as a function of time.2. _____ The cross spectrum between two signals at a frequency f = 10 Hz is givenA. (9 + 19) B. 9/19 C. 9 x 19 D. 10.03. _____ Two shafts are connected by a belt drive with two pulleys of diameter 18 inchesand 6 inches, respectively. If the speed of the shaft with the 6-inch pulley is 1182 RPM, the speed of the second shaft isA. 394 RPM. B. 591 RPM. C. 3546 RPM. D. 197 RPM.4. _____ Which of the following installation of an accelerometer exhibits the bestfrequency bandwidth characteristic?A. Magnetically mounted. B. Quick connect. C. Stud mounted. D. Glue mounted.5. _____ The frequency range of ultrasonic pulses used in NDE is aboutA. 0-200 Hz. B. 1-10 kHz. C. 0.5-10 MHz D. Less than 20 kHz.6. _____ Materials to be examined using eddy current testing must have thefollowing propertyA. Must be magnetic.B. Must be electrically non-conductive.C. Must be electrically conductive.D. Must be both magnetic and electrically conductive.7. _____ The inductive reactance of an eddy current coil is 10 Ohms and itsresistance is 4 Ohms. The magnitude of the coil impedance isA. 14 Ohms B. 2.5 Ohms C. (102 + 42) Ohms D. Ohms 1168. _____ In eddy current testing, as the test coil frequency decreases, the depth ofpenetration of the induced fieldA. IncreasesB. DecreasesC. Is independent of the coil frequencyD. Remains constant9. _____ In pulse-echo ultrasonic testing (UT) the UT transducer-receiver configurationhas the following form.A. Transducer and receiver are on opposite sides of the test specimenB. Transducer and receiver are on the same side of the test specimenC. There is no need for a receiverD. There is no need for a transducer10. _____ Radiographic examination uses the following penetrating radiationA. X-rays B. Gamma rays C. Neutron beams D. All the above11. _____ NDE technique based on non-magnetic and electrically non-conductiveproperty isA. Visual inspection B. Dye penetrant testing C. Ultrasonic testing D. All the above12. _____ The drum in a clothes dryer is driven by a belt drive which is connected to the drive shaft with a 2-inch pulley and the drive shaft motor has a speed of 600 RPM. If the rotational speed of the drum is 60 RPM, the drum outside diameter is equal toA. 10 inches. B. 20 inches. C. 30 inches. D. 40 inches.13. _____ Which of the following is not a candidate for thermography?A. Monitoring hot spots on electric motors.B. Boiler tubing inspection in a coal-fired power plant.C. Monitoring insulation breakdown in a pipe.D. Monitoring poor contact in electric breakers.14. _____ Which of the following NDE method is applicable for inspecting a partmade of plastic?A. Eddy current testingB. Ultrasonic testingC. Magnetic particle testingD. All the above15. _____ Eddy current testing is most effective for detectingA. Surface and near-surface discontinuitiesB. Deep surface discontinuitiesC. Cracks in thin-wall pipingD. A and C16. _____ A couplant is generally required for this NDE techniqueA. Eddy current testingB. Radiographic testingC. Infrared inspectionD. Ultrasonic testing17. _____ What is the most effective transducer for measuring the displacement ofthe shaft in a sleeve (journal) bearing?A. High bandwidth accelerometerB. Proximity probe that uses eddy current principleC. Thermal imaging cameraD. Velocity transducer TQEM 2:Digital Signal Processing (DSP)1. _____ Vibration data were acquired during the start-up (increasing speed) ofa steam turbine. This signal isA. Non-stationary with constant frequency as a function of time.B. Stationary with constant frequency as a function of time.C. Stationary with an increasing frequency component as a function of time.D. Non-stationary with an increasing frequency component as a function of time.2. _____ The cross spectrum between two signals at a frequency f = 10 Hz is givenA. (9 + 19) B. 9/19 C. 9 x 19 D. 10.03. _____ Two shafts are connected by a belt drive with two pulleys of diameter 18 inchesand 6 inches, respectively. If the speed of the shaft with the 6-inch pulley is 1182 RPM, the speed of the second shaft isA. 394 RPM. B. 591 RPM. C. 3546 RPM. D. 197 RPM.4. _____ Which of the following installation of an accelerometer exhibits the bestfrequency bandwidth characteristic?A. Magnetically mounted. B. Quick connect. C. Stud mounted. D. Glue mounted.5. _____ The frequency range of ultrasonic pulses used in NDE is aboutA. 0-200 Hz. B. 1-10 kHz. C. 0.5-10 MHz D. Less than 20 kHz.6. _____ Materials to be examined using eddy current testing must have thefollowing propertyA. Must be magnetic.B. Must be electrically non-conductive.C. Must be electrically conductive.D. Must be both magnetic and electrically conductive.7. _____ The inductive reactance of an eddy current coil is 10 Ohms and itsresistance is 4 Ohms. The magnitude of the coil impedance isA. 14 Ohms B. 2.5 Ohms C. (102 + 42) Ohms D. Ohms 1168. _____ In eddy current testing, as the test coil frequency decreases, the depth ofpenetration of the induced fieldA. IncreasesB. DecreasesC. Is independent of the coil frequencyD. Remains constant9. _____ In pulse-echo ultrasonic testing (UT) the UT transducer-receiver configurationhas the following form.A. Transducer and receiver are on opposite sides of the test specimenB. Transducer and receiver are on the same side of the test specimenC. There is no need for a receiverD. There is no need for a transducer10. _____ Radiographic examination uses the following penetrating radiationA. X-rays B. Gamma rays C. Neutron beams D. All the above11. _____ NDE technique based on non-magnetic and electrically non-conductiveproperty isA. Visual inspection B. Dye penetrant testing C. Ultrasonic testing D. All the above12. _____ The drum in a clothes dryer is driven by a belt drive which is connected to the drive shaft with a 2-inch pulley and the drive shaft motor has a speed of 600 RPM. If the rotational speed of the drum is 60 RPM, the drum outside diameter is equal toA. 10 inches. B. 20 inches. C. 30 inches. D. 40 inches.13. _____ Which of the following is not a candidate for thermography?A. Monitoring hot spots on electric motors.B. Boiler tubing inspection in a coal-fired power plant.C. Monitoring insulation breakdown in a pipe.D. Monitoring poor contact in electric breakers.14. _____ Which of the following NDE method is applicable for inspecting a partmade of plastic?A. Eddy current testingB. Ultrasonic testingC. Magnetic particle testingD. All the above15. _____ Eddy current testing is most effective for detectingA. Surface and near-surface discontinuitiesB. Deep surface discontinuitiesC. Cracks in thin-wall pipingD. A and C16. _____ A couplant is generally required for this NDE techniqueA. Eddy current testingB. Radiographic testingC. Infrared inspectionD. Ultrasonic testing17. _____ What is the most effective transducer for measuring the displacement ofthe shaft in a sleeve (journal) bearing?A. High bandwidth accelerometerB. Proximity probe that uses eddy current principleC. Thermal imaging cameraD. Velocity transducer

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