Test and Measurements

1. A __________ operates on the magnetic attraction-repulsion principles

1. Spectrum analyzer
2. Oscilloscope
3. Field strength meter
4. Milliameter

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2. A certain pulse measures 10ms and has a period of 50ms. The duty cycle is

1. 20%
2. 10%
3. 5%
4. 100%

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3. A common technique for measuring power at high frequency is to

1. employ high power meter
2. use microwave meters
3. employ a sensing element that converts the RF power to a measurable dc or low- frequency signal
4. use thermocouple

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4. A dynamometer instrument is mainly used as a /an

1. dc ammeter
2. wattmeter
3. dc voltmeter
4. ohmmeter

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5. A galvanometer with a 20 n coil resistance has a full-scale deflection of 10mA. A 0.02 n is placed across the meter to increase its rating capacity. What is the new full-scale current foe the meter?

1. 1.01A
2. 100.1A
3. 10.10A
4. l0.0lA

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6. A material that glows when struck by the energetic electrons in a CRT.

1. Aquadag
2. Silicon
3. Germanium
4. Phosphor

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7. A moving force in analog instruments which ensures that the deflection of the pointer for a given value of measured quantity always has the same value.

1. Damping force
2. Controlling force
3. NRZ force
4. Deflecting force

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8. A moving system force in analog instruments which causes the moving system to deflect from its zero position.

1. Deflecting force
2. Damping force
3. Return-to-zero force
4. Controlling force

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9. A pattern displayed by oscilloscopes which has a steady characteristic is called

1. Lissajous
2. Nyquist pattern
3. Barkhausen's criterian
4. Fermat's pattern

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10. A sensing element that provides a dc voltage less than 10 mV with typical power range of 0.1 to 100 mW.

1. Thermal converters
2. Thermal sensors
3. Thermocouple sensors
4. Diode sensors

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