**Instruction:**

- All question are compulsory
- 4 marks for the write answer and for each wrong choice 1/2 marks will be deducted.
- Total time- 1 Hr

**IES Sample Paper**

**i)** A thermocouple is

- Has a low time constant when it is bare
- Has a low time constant when it is provided with a sheath
- Has the same time constant whether it is bare or with sheath
- None of the these

Ans – (1)

**ii)** Piezoelectric accelerometers

- Should not be used for high freq. above 100 Hz
- Should be used for low freq.
- Should use a monitoring source of low input impedence
- Have a low natural freq.

Ans – (2)

**iii)** The meter constant of a single-phase 240V induction watthour meter is 400 revolution per kWh. The speed of the meter disc for a current of 10A Of 0.8 p.f. lagging will be

- 12.8 rpm
- 16.02 rpm
- 18.2 rpm
- 21.1 rpm

Ans – (1)

**iv)** The wheatstone method of resistance measurement is idealy suitable for the measurement of the values in the range of

- 0.001 ohms – 1 ohm
- 0.1 ohm-100 ohms
- 100 ohm- 10 k-ohms
- 100 k-ohms – 10 M-ohms

Ans – (2)

**v)** A null type of instrument as compared to a deflection type instrument has

- Higher accuracy
- Lower sensitivity
- Faster response
- All of above

Ans- (1)

**vi)** The value of resistance of an earthing electrode depends upon

- Shape and material of electrode
- Depth to which electrode is driven into earth
- Specific resistance of coil
- All

Ans- (4)

**vii)** Which of the photoelectric transducers is used for production of electric energy by converting solar energy

- Photo emissive cell
- Photo diode
- Photo transistor
- Photo voltaic cell

Ans- (4)

**viii)** The dynamic characteristic of a capcitive transducer are similar to those of

- Low pass filters
- High pass filters
- Notch filters
- Band pass filters

Ans-(2)

**ix)** Sensitivity of a potentiometer can be increased by

- Decreasing the length of the potentiometer
- Increasing the length
- Decreasing the current in wire
- Decreasing the resistance in the rheostat in series with the battery

Ans – (3)

**x)** 1 A watt meter is reading back-wards in an experiment .upscale reading can be obtained by reversing

- Pressure coil connection only
- Current coil connection only
- Both pressure and current coil connections only
- Either pressure or current

And – (4)

**xi)** If the practical units of the voltages and the current wave each made 20 times as large as they are at present , what would be the consequences alteration in the size of the unit of capacitance?

- 200 times
- 60 times
- 20 times
- Nil

Ans- (4)

**xii)** A thermo-couple ammeter gives full-scale deflection of 10A. when it reads 1/5th of the scale , the current will be

- 2A
- 4A
- 4.47A
- 5.78A

Ans – (3)

**xiii)** The sensitivity of the thermostats as compared to with the sensitivity of the platinum resistor temp. detector over a temp. range of -100 deg to 400 deg celcius to change in temp. is

- 100 times
- 10^6 times
- 10^7 times
- 10^3 times

Ans – (2)

**xiv)** A vertical amplifier for a CRO instrument responds to

- Only a high gain
- Only a broad band-width
- A constant gain times bandwidth product
- All of these

Ans- (3)

**xv)** The high torque to weight ratio in an analog indicating instruments indicates

- High friction loss
- Low friction loss
- Nothing as regards friction loss
- None

Ans-(2)

**xvi)** A d’Arsonval movements is rated at 50 micro ampere. Its sensitivity is

- 20000Ω/V
- 200000 Ω/v
- 200Ω/v
- Cant be determined

Ans- (1)

**xvii)** A current transformer has a rating of 100/5A. its magnetizing and loss component of exciting current are 10 A and 0.6 A respectively and secondary windings burden is purely resistive, its transformation ratio at rated current is

- 20.12
- 20.2
- 200.2
- None

Ans- (2)

**xviii)** Turns compensation is used in current transformer primarily for reducing

- Phase angle error
- Both ratio and phase angle error
- Ratio error reduction in phase error is incidental
- None

Ans- (3)

**xix)** The main advantages of using a three OP-AMP instrumentation amplifier over a single OP-AMP differential amplifier lies in

- Higher value of CMRR
- Low noise figure
- c. Elimination of the need for accurate matching of resistors
- Simplicity of gain adjustments

Ans-(3)

**xx)** On an oscilloscope , the lissajous pattern of eight keeps on changing the shope when the ratio of frequency is

- Not exactly 1:1
- Not exactly 2:1
- Exactly 3:1
- Exactly 4:1

Ans- (2)

**Viewers can also download the PDF of the above sample paper:**

**Viewers can also view our other posts on IES sample paper:**

**Your views are valuable to us. Any type of suggestion will be highly appreciated.**