The duty cycle of a pulse of width 2 micro sec and repetition frequency 4 kHz is
A.0.5
B.0.05
C.0.008
D.0.0006
E.0.00008
Category: Mechanical Measurements Mcqs
A rotameter can be used to measure
A.Rotation
B.Flow
C.Viscosity
D.Specific gravity
E.Pressure of wind
The function of the reference electrode in a pH meter is to
A.Measure average pH value
B.Produce a constant voltage
C.Provide temperature compensation
D.Produce a constant current
E.None of the above
The temperature of freezing mercury is
A.0?C
B.?39?C
C.?69?C
D.?169?C
E.?225?C
Under force-current analogy, displacement is considered as analogous to
A.Current
B.Voltage
C.Induced emf
D.Mutual inductance
E.Magnetic flux linkage
The advantage of digital instruments is
A.No observational error
B.Faster reading
C.Output can be fed to a memory circuit
D.Better accuracy
E.All of the above
Which of the following magnetic material has least value of (B.H.)max?
A.Carbon steel
B.Cobalt steel
C.Alnico
D.Alcomax
An error that under the same conditions will always be of the same size and sign is known as
A.Mistake
B.Accidental error
C.Cumulative error
D.Systematic error
E.Detectable error
A strobotron is
A.A tachogenerator
B.A two winding dc generator
C.A hot cathode gaseous discharge tube
D.A device for temperature measurement
E.None of the above
Flow rate of a river can be determined by
A.Kennison nozzle
B.Kundt’s tube
C.Orifice
D.Weir
E.Venturimeter
