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# Measurements And Instrumentation Online Exam Quiz

Important questions about Measurements And Instrumentation. Measurements And Instrumentation MCQ questions with answers. Measurements And Instrumentation exam questions and answers for students and interviews.

Options

A : 0.004 ?

B : 0.005 ?

C : 0.05 ?

D : 0.1 ?

Options

A : True

B : False

C :

D :

Options

A : 1 mV/pC

B : 1.5 mV/pC

C : 2.5 mV/pC

D : 4 mV/pC

Options

A : 2%

B : 2.5%

C : 4%

D : 5%

Options

A : 0.1 V/mm

B : 0.5 V/mm

C : 1 V/mm

D : 5 V/mm

### 7. In two wattmeter method of 3 phase power measurement, when does one wattmeter read negative

Options

A : when power factor is less than 0.5 lagging

B : when power factor is greater than 0.5 lagging

C : when power factor is less than 0.5

D : when power factor is unity

### 8. The household energy meter is

Options

A : indicating instrument

B : recording instrument

C : integrating instrument

D : none of the above

### 9. Induction wattmeter can be used in

Options

A : ac circuit only

B : dc circuit only

C : both ac and dc circuit

D : ac 3 phase only

Options

A : 1.39 V

B : 0.75 V

C : 13.9 V

D : 7.45 V

### 1. To increase Q factor of a coil, the wire should be

Options

A : long

B : thin

C : thick

D : long and thin

### 2. The Lissajous pattern observed on screen of CRO is a straight line inclined at 45° to x axis. If X -plate input is 2 sin ? t , the Y -plate input is

Options

A : 2 sin ? t

B : 2 sin (? t + 45°)

C : 2 sin (? t - 45°)

D : 2 2 sin ? t + 45°)

Options

A : 25°

B : 15°

C : 5°

D : 1°

### 4. A voltmeter using thermocouples measures

Options

A : rms value

B : peak value

C : average value

D : peak to peak value

### 5. Which of the following statement is correct for two wattmeters method of power measurement in 3 phase circuit?

Options

A : Power can be measured by this method only for star connected loads

B : When two wattmeters have equal readings power factor is 0.5.

C : When power factor is 1, one of the wattmeters readings is zero

D : When the two wattmeter read equal and opposite, p.f. is zero.

### 6. In a CRO which of the following is not a part of electron gun

Options

A : cathode

B : grid

C : accelerating anode

D : X - Y plates

Options

A : 260 V

B : 252 V

C : 250 V

D : 248 V

Options

A : 200 ?C

B : 400 ?C

C : 50 ?C

D : 25 ?C

### 9. In a strain measuring device using a strain gauge, the output quantity is

Options

A : voltage

B : resistance

C : impedance

D : either (a) or (b)

### 10. Magnetic flux density has the dimensions

Options

A : MI -1 T -2

B : M -1 I -2 T -2

C : ML -3 T -2

D : MI -1 T -3

### 1. A dynamometer wattmeter is connected in ac circuit. The measured power is

Options

A : rms power

B : average power

C : peak power

D : instantaneous power