Measurement And Instrumentation - Study Mode

Show All Answers

[#76] A 300 V, 5 A, 0.2 pf low power factor wattmeter is used to measure the power consumed by a load. The wattmeter scale has 150 divisions and the pointer is on the 100 th division. The power consumed by the load (in watts) is:

(A) 100

(B) 200

(C) 400

(D) 500

Correct Answer

(B) 200

[#77] The principle of working of a D' Arsonval Galvanometer is based upon

(A) Heating effect of current

(B) Induction effect of current

(C) Magnetic effect of current

(D) Electrostatic effect of current

Correct Answer

(C) Magnetic effect of current

[#78] The standard for long distance analog signal transmission in process control industry is

(A) 4-20 mV

(B) 0-20 mA

(C) 4-20 mA

(D) 0-5 V

Correct Answer

(C) 4-20 mA

[#79] Some of the functional building blocks of a measurement system are: Primary Sensing element (PSE) Variable conversion Element (VCE) or Transducer Data Transmission element (DTE) Variable manipulation Element (VME) Data Presentation Element (DPE) The correct sequential connection of a the functional building blocks for an electronic pressure gauge will be:

(A) PSE, VME, VCE, DPE, DTE

(B) PSE, VCE, VME, DTE, DPE

(C) DTE, DPE, VCE, PSE, VME

(D) PSE, VCE, DTE, DPE, VME

Correct Answer

(B) PSE, VCE, VME, DTE, DPE

[#80] Consider the following statements regarding sources of error in a Q-meter: 1. If a coil with resistance R is connected in direct measurement mode and if the residual resistance of Q-meter is 0.1 R, then the measured Q of the coil would be 1.1 times the actual Q. 2. If the inductance to be measured is less than 0.1 mH, the error due to presence of residual inductance cannot be neglected. 3. The presence of distributed capacitance in a coil modifies the effective Q of the coil. Which of the above statements are correct?

(A) 1, 2 and 3

(B) 1 and 2 only

(C) 2 and 3 only

(D) 1 and 3 only

Correct Answer

(C) 2 and 3 only