Measurement and Instrumentation
The measurment of very low and very high frequencies is invariably done using a frequency counter in which one of the following?

 Frequency and period measurment modes, respectively.
 Period measurment modes only.
  Period and frequency measurement modes respectively.
 Frequency measurment modes only.

ANSWER DOWNLOAD EXAMIANS APP

Measurement and Instrumentation
For power measurement of three phase circuit by two wattmeter method, when the value of power factor is less than 0.5 lagging

One of the wattmeter connections will have to be reversed
Both give the same readings
Pressure coil of the wattmeter will become ineffective.
One of the wattmeters will read zero

ANSWER DOWNLOAD EXAMIANS APP

Measurement and Instrumentation
Assertion (A) : Precision is a necessary prerequisiteof accuracy. Reason (R) : Precision guarantees accuracy.

 A is true but R is false
 A is false bur R is true
 Both A and R are true and R is the correct explanation of A
 Both A and R are true but R is NOT the correct explanation of A

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Measurement and Instrumentation