Industrial Electronics

61. What is a three terminal device used to control large current to a load?

1. SCR
2. SCS
3. GTO
4. Thyristor

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62. What is an automatic speed control device using the centrifugal force on rotating flyweights as the feedback element?

1. Regulator
2. Flywheel governor
3. Field control
4. Throttle valve

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63. What is basically a two-terminal parallel-inverse combination of semiconductor layers that permits triggering in either direction?

1. Diac
2. Triac
3. Quadrac
4. Shockley Diode

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64. What is concerned with the measurement of electric signals on the scalp with arise from the underlying neural activity in the brain (including synaptic sources)?

1. ECG
2. EEG
3. Ultrasound
4. EKG

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65. What is dimensionless parameter of the second-order characteristic equation?

1. Damping ratio
2. Accuracy
3. Efficiency ratio
4. Transfer function ratio

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66. What is one of the most widely used sensing elements particularly for pressure ranges higher than 2 MPa?

1. Bellows
2. Bourdon tube
3. Capsule
4. Straight tube

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67. What is that value of current below which the SCR switches from the conduction state to the forward blocking region under stated conditions?

1. Holding current
2. Forward current
3. Reverse current
4. Trigger current

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68. What is that voltage above when the SCR enters the conduction region?

1. Reverse breakover voltage
2. Forward breakover voltage
3. Holding voltage
4. Trigger voltage

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69. What is the control element in an SCR?

1. Gate
2. Anode
3. Grid
4. Cathode

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70. What is the most widely used altitude and altitude-rate transducers?

1. Flowmeter
2. Psychometer
3. Gyro
4. Gygrometer

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