Electrical Engineering · Question Bank
Instrumentation
224 questions · page 7 of 12. Answer in your head first, then check the solution.
#121
An electrodynamic meter used to measure power
Ahook-on type voltmeter
Bwattmeter
Cwatt-hour meter
Dmulti-meter
#122
A device used to mechanically measure the output power of a motor
Adynamometer
BMegger
Cconcentric-vane instrument
Dradial-vane instrument
#123
An indicating instrument whose movable coils rotate between two-stationary coils, usually used as wattmeter
Ainduction-type meter
Bradial-vane instrument
Celectrodynamometer
Dconcentric-vane instrument
#124
Dynamometers are mostly used as
Avoltmeter
Bammeter
Cohmmeter
Dwattmeter
#125
What damping method is generally used in dynamometers?
Aspring
Bfluid friction
Ceddy-current damping
Dair friction
#126
Which dynamometer instrument has a uniform scale?
Avoltmeter
Bammeter
Cohmmeter
Dwattmeter
#127
For a dynamometer to be able to measure high current, a _______ should be used
Ashunt resistor
Bmultiplier
CCVDT
Dcurrent transformer
#128
Error in voltmeter reading is due to
Ainsertion
Bloading
Cbattery aging
Dconversion
#129
Error in ammeter reading is due to
Ainsertion
Bloading
Cbattery aging
Dconversion
#130
Which type of meter requires its own power source
AA voltmeter
BAn ammeter
CAn ohmmeter
DA wattmeter
#131
Error in ohmmeter is due to
Ainsertion
Bloading
Cbattery aging
Dmeter friction
#132
Decreasing the value of the shunt resistor of an ammeter, its current measuring capability
Aincreases
Bdecreases
Creamins constant
Dnone of them
#133
A device that is used to measure current without opening the circuit
Amegger tester
Bclamp probe
Cammeter
Dmulti-meter
#134
Which of the ammeter below has no insertion error?
AD'Arsonval meter
Bclamp-meter
Cmicrometer
Dmeter with current transformer
#135
To prevent damage of the multirange ammeter during selection, a/an ________ should be used.
Adirect shunt
Bselected shunt
CAyrton shunt
Dshunt fuse
#136
For the greatest accuracy, what should be the input impedance of a VOM be?
A1,000 ohms/V
B50,000 ohms/V
Cas large as possible
Das small as possible
#137
Voltage measurement in a high impedance circuit requires a voltmeter with
Alow input impedance
Bhigh input impedance
Chigh voltage probe
Dlow voltage probe
#138
A meter has a full-scale current of 50µA, what is its sensitivity?
A20 k ohm/V
B20 V/ohm
C50 k ohm/V
D50 µA/V
#139
If a meter with a full-scale current of 100µA is used as an ac voltmeter with half-wave rectification, its ac sensitivity is
A10,000 ohm/V
B4,500 ohm/V
C9,000 ohm/V
D100 ohm/V
#140
In order to make an accurate measurement as possible, the internal resistance of a voltmeter must be
Aas high as possible
Bas low as possible
Cproportional to the voltage range
Dproportional to the current range
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