Measurement and Instrumentation

61. Murray loop test can be used for location of

1. ground fault on a cable
2. short circuit fault on a cable
3. both the ground fault and the short-circuit fault
4. none of the above

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62. Operating torques in analogue instruments are

1. deflecting and control
2. deflecting and damping
3. deflecting, control and damping
4. vibration and balancing

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63. Resistances can be measured with the help of

1. wattmeters
2. voltmeters
3. ammeters
4. ohmmeters and resistance bridges

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64. s an instrument which measures the insulation resistance of an electric circuit relative to earth and one another,

1. Tangent galvanometer
2. Meggar
3. Current transformer
4. None of the above

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65. Standard resistor is made from

1. platinum
2. maganin
3. silver
4. nichrome

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66. Systematic errors are

1. instrumental errors
2. environmental errors
3. observational errors
4. all of the above

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67. The adjustment of position of shading bands, in an energy meter is done to provide

1. friction compensation
2. creep compensation
3. braking torque
4. none of the above

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68. The chemical effect of current is used in

1. D.C. ammeter hour meter
2. D.C. ammeter
3. D.C. energy meter
4. none of the above

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69. The desirable static characteristics of a measuring system are

1. accuracy and reproducibility
2. accuracy, sensitivity and reproducibility
3. drift and dead zone
4. static error

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70. The disc of an instrument using eddy current damping should be of

1. conducting and magnetic material
2. non-conducting and magnetic material
3. conducting and non-magnetic material
4. none of the above

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