electrical measuring instruments mcq questions answers part1

Q1. The suitable bridge for measurements on high voltage capacitors
(A) Wein bridge
(B) Modified De Santys bridge
(C) Schering bridge
(D) Any of these

Q2. In order to achieve high accuracy, the slide wire of a potentiometer should be
(A) as long as possible
(B) as short as possible
(C) is of non magnetic type
(D) very thick

Q3. The best device to measure the true open circuit EMF of a battery
(A) D.C. voltmeter
(B) Ammeter and a known resistance
(C) D.C. potentiometer
(D) All of these

Q4. For measuring a very high resistance we should use
(A) Kelvins double bridge
(B) Wheat stone bridge
(C) Meggar
(D) All of these

Q5. In most of the instruments, damping is provided by
(A) fluid friction
(B) spring
(C) eddy currents
(D) all of the above

Q6. Which of the following instrument has the best accuracy?
(A) Moving coil meter
(B) Moving iron meter
(C) Thermocouple meter
(D) Rectifier type meter

Q7. Which of the following meters are not suitable for DC circuits
(A) Mercury motor meters
(B) Commutator motor meters
(C) Induction meters
(D) All of these

Q8. The range of instruments can be extended using?
(A) Shunts
(B) Multipliers
(C) Current and potential transformers
(D) All of the above

Q9. Inductance can be measured by
(A) Wien bridge
(B) Schering bridge
(C) Maxwells bridge
(D) Hay bridge

Q10. The speed of energy meter can be controlled by
(A) Series magnet
(B) Shunt magnet
(C) Braking magnet
(D) All of these

Q11. The energy meter used for measuring energy of a DC circuit is
(A) Ampere hour type
(B) Induction type
(C) Electrostatic type
(D) Dynamometer type

Q12. By using a low resistance shunt ,a moving-coil permanent-magnet instrument can be used as
(A) ammeter
(B) voltmeter
(C) flux-meter
(D) wheatsons bridge

Q13. Which of the following device prevents the oscillation of the moving system and enables to reach its final position quickly
(A) deflecting
(B) controlling
(C) damping
(D) any of the above

Q14. When AC voltage is connected to a PMMC meter, then
(A) The reading is zero
(B) The meter will get damaged
(C) The pointer will oscillate to and fro
(D) The pointer will not move at all

Q15. An indicating instrument possesses which of the following?
(A) Deflecting device
(B) Controlling device
(C) Damping device
(D) All of the above

Q16. The instuments used for measuring resistance
(A) wattmeters
(B) voltmeters
(C) ammeters
(D) ohmmeters and resistance bridges

Q17. The error in an instrument is taken as the percentage of
(A) Full scale value
(B) Measured value
(C) Means value
(D) RMS value

Q18. Which of the following are integrating instruments?
(A) Ammeters
(B) Voltmeters
(C) Wattmeters
(D) Ampere-hour and watt-hour meters

Q19. The type of instruments which measure the total quantity of electricity delivered in a particular time.
(A) Absolute
(B) Indicating
(C) Recording
(D) Integrating

Q20. Which of the following instruments indicate the instantaneous value of the electrical quantity being measured at the time at which it is being measured?
(A) Absolute instruments
(B) Indicating instruments
(C) Recording instruments
(D) Integrating instruments