Question: The information is sent by CW transmitter by –
1. Changing the audio frequency
2. Interrupting radio signal
3. Using microphone
4. Using camera
Answer: 1
Question: If one cylinder of a diesel engine receives more fuel than the others, then for that cylinder the —
1. Exhaust will be smokey
2. Piston rings would stik into piston grooves
3. Scavenging occurs
4. Engine starts overheating
Answer: 1
Question: What is the proper use of signal generator?
1. Designing
2. Testing
3. Repairing
4. All of the Above
Answer: 4
Question: Which type of oscillator is most stable in simple circuit?
1. Crystalline oscillators
2. Clapp oscillators
3. Colepitts oscillator
4. Armstong oscillator
Answer: 1
Question: What is the S. I. unit of magnetic flux density?
1. Gauss
2. Tesla
3. Oersted
4. Weber
Answer: 2
Question: What is the power factor of a pure resistor circuit?
1. One
2. Zero
3. Leading
4. Lagging
Answer: 1
Question: A transformer mainly transforms –
1. Current
2. Voltage
3. Frequency
4. Power
Answer: 2
Question: There is 20 volt accross the inductor and 15 volt across the resistance in the a.c. supplied series R-L circuit. What would be the supply voltage?
1. 20 volt
2. 15 volt
3. 25 volt
4. 17.5 volt
Answer: 3
Question: What is the value of knee voltage of silicon diode?
1. 0.3V
2. 0.33V
3. 0.7V
4. 1.1V
Answer: 3
Question: Estimated time period of a pendulum of length 0.2m is closer to is
1. .5 sec
2. 1 sec
3. 2 sec
4. None of these
Answer: 2
Question: Which of the following light waves is outside the visible spectrum?
1. Violet
2. Blue
3. Yellow
4. Ultraviolet
Answer: 4
Question: A periscope works by the principle of
1. Refraction
2. Total Internal reflection
3. Diffraction
4. Reflection and refraction
Answer: 2
Question: A falling drop of rain water acquires the spherical shape due to
1. Surface Tension
2. Gravitational force
3. Atmospheric pressure
4. Viscosity
Answer: 1
Question: Each of 3 capacitors of capacity C are connected together in series. This combination is added in paralled to a capacitor of capacity C. Resultant capacity will be
1. C
2. 3C
3. 4C
4. 4C/3
Answer: 4
Question: A boy has five resistance of 1/5 ohm each. The maximum resistance that can be formed with them is
1. 0.5 ohm
2. 1 ohm
3. 1/25 ohm
4. 1/5 ohm
Answer: 2