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Home⇒ Engineering⇒
Measurement and instrumentation
1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
Q41 ⇒ A moving iron instrument can be used
for both D.C. and A.C. [other wrong options] [Discuss in forum] D.C. only A.C. only |
Q42 ⇒ In a 3-phase power measurement by
two wattmeter method, both the wattmeters
had identical readings. The
power factor of the load was unity [other wrong options] [Discuss in forum] 0.8 lagging 0.8 leading zero |
Q43 ⇒ Murray loop test can be used for location
of both the ground fault and the shortcircuit fault [other wrong options] [Discuss in forum] groundlault ón a cable short circuit fault on a cable none of the above |
Q44 ⇒ To measure an A.C. voltage by using an
A.C. potentiometer, it is desirable that
the supply for the potentiometer in
taken from the same source as the unknown voltage [other wrong options] [Discuss in forum] from a source which is not the same
as the unknown voltage from a battery any of the above |
Q45 ⇒ If the current in a capacitor leads the
voltage by 80°, the loss angle of the
capacitor is 10° [other wrong options] [Discuss in forum] 80° 120° 170° |
Q46 ⇒ In a Weston frequency meter, the magnetic axes of the two fixed coils are perpendicular [other wrong options] [Discuss in forum] parallel inclined at 60° inclined at 120° |
Q47 ⇒ Standard resistor is made from maganin [other wrong options] [Discuss in forum] platinum silver nichrome |
Q48 ⇒ A sensitive galvanometer produces
large deflection for a small value of current [other wrong options] [Discuss in forum] large value of current large value of power large value of voltage none of the above |
Q49 ⇒ An instrument transformer is used to
extend the range of induction instrument [other wrong options] [Discuss in forum] electrostatic instrument moving coil instrument any of the above |
Q50 ⇒ Potentiometer is a comparison instrument [other wrong options] [Discuss in forum] calibrating instrument indicating instrument integrating instrument |
Q51 ⇒ A dynamometer type wattmeter has uniform scale [other wrong options] [Discuss in forum] square law scale non-linear scale logarithmic scale |
Q52 ⇒ A wattmeter will be free from the
effects of power factor and frequency
variations in case voltage coil resistance is zero [other wrong options] [Discuss in forum] damping is not provided pressure coil inductance is zero a capacitance is connected in parallel to pressure coil |
Q53 ⇒ The dissipation factor of a capacitor can
be measured with Schering bridge [other wrong options] [Discuss in forum] Galvanometer Potentiometer Campbell bridge |
Q54 ⇒ Which of the following instruments can
be used for measuring 132 kV A.C.
voltage ? Electrostatic voltmeter [other wrong options] [Discuss in forum] Hot wire voltmeter Moving coil voltmeter Moving iron voltmeter |
Q55 ⇒ The phenomenon of 'creeping' occurs in Watthour meters [other wrong options] [Discuss in forum] Ammeters Voltmeters Wattmeters |
Q56 ⇒ The internal resistance of a voltmeter
must be very high so that minimum current passes through the meter [other wrong options] [Discuss in forum] range is high accuracy is high loading effect is maximum |
Q57 ⇒ In electrical measuring instruments,
electrical energy is converted to mechanical energy [other wrong options] [Discuss in forum] heat energy chemical energy light energy |
Q58 ⇒ Primary of an instrument transformer
(C.T.) is connected in series with the line [other wrong options] [Discuss in forum] parallel with the lint across two lines any of the above |
Q59 ⇒ Scale of an instrument will be uniform
if both (a) and (b) [other wrong options] [Discuss in forum] deflecting torque varies directly as
the deflection angle control torque varies dlrectly as the deflection angle damping torque varies directly as the deflection angle |
Q60 ⇒ In measuring instruments a mirror is
provided behind the pointer with a purpose
that reading errors due to inclined observation are eliminated by removing parallax between the pointer and its image in the mirror [other wrong options] [Discuss in forum] with the help of the mirror it may
be seen whether the pointer is bent
or not the scale is illuminated through the mirror any of the above |
Or |