Measurement And Instrumentation - Study Mode

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[#226] A compensated wattmeter has its reading corrected for error due to which one of the following parameters?

(A) Frequency

(B) Friction

(C) Power consumed in current coil

(D) Power consumed in pressure coil

Correct Answer

(D) Power consumed in pressure coil

[#227] Consider the following statements in respect of two types of a dynamometer wattmeter connections are shown below the figure (a) and figure (b). 1. Figure (a) is used when applied voltage is high and load current flowing is low. 2. Figure (b) is used when applied voltage is low and load current flowing is high. 3. If the order of connections in Statements 1 and 2 are in opposite order, gross error will be increased. 4. If the order of connections in Statements 1 and 2 are in opposite order, gross error will be reduced. Which of the statements given above are correct?

(A) Only 1 and 2

(B) Only 3 and 4

(C) 1, 2 and 3

(D) 1, 2 and 4

Correct Answer

(C) 1, 2 and 3

[#228] Identify the correct matches: List-I List-II a. Spirometer 1. Electric activity of heart b. Sphygmomanometer 2. Respiratory volume measurement c. Plethysmograph 3. Measurement of change in volume of body part d. Electrocardiograph 4. Blood pressure measurement

(A) a-1, b-4, c-3, d-2

(B) a-2, b-3, c-4, d-1

(C) a-4, b-1, c-2, d-3

(D) a-2, b-4, c-3, d-1

Correct Answer

(D) a-2, b-4, c-3, d-1

[#229] For the measurement of electrical energy, we may use a

(A) Wattmeter

(B) KWh meter

(C) Multimeter

(D) Voltmeter, ammeter and PF meter

Correct Answer

(B) KWh meter

[#230] Match List-I with List-II and select the correct answer using the options given below: List-I (Transducer) List-II (Measured Quantity) a. Hall Effect pick-up 1. Pressure b. Piezoelectric pick-up 2. Velocity of a fluid c. Hot-wire anemometer 3. Flow rate d. Rotameter 4. Current

(A) a-4, b-3, c-2, d-1

(B) a-2, b-1, c-4, d-3

(C) a-4, b-1, c-2, d-3

(D) a-2, b-3, c-4, d-1

Correct Answer

(C) a-4, b-1, c-2, d-3