Question: An advantage of RC coupling scheme is the___________?

• 1. Good impedance matching
• 2. Economy
• 3. High efficiency
• 4. None of the above

Question: In an RC coupled amplifier, the voltage gain over mid-frequency range_____________?

• 1. Changes abruptly with frequency
• 2. Is constant
• 3. Changes uniformly with frequency
• 4. None of the above

Question: RC coupling is used for_____________amplification?

• 1. Voltage
• 2. Current
• 3. Power
• 4. None of the above

Question: A radio receiver has____________of amplification?

• 1. One stage
• 2. Two stages
• 3. Three stages
• 4. More than one stages

Question: Artificial draught is produced by______________?

• 1. induced fan
• 2. forced fan
• 3. induced and forced fan
• 4. all of the above

Question: For forced draught system, the function of chimney is mainly_____________?

• 1. to produce draught to accelerate the combustion of fuel
• 2. to discharge gases high up in the atmosphere to avoid hazard
• 3. to reduce the temperature of the hot gases discharged
• 4. none of the above

Question: The draught produced by steel chimney as compared to that produced by brick chimney for the same height is_____________?

• 1. less
• 2. more
• 3. same
• 4. may be more or less

Question: The draught produced by chimney of given height at given outside temperature___________?

• 1. decreases if the chimney gas temperature increases
• 2. increases if the chimney gas temperature increases
• 3. remains same irrespective of chimney gas temperature
• 4. may increase or decrease

Question: The draught produced, for a given height of the chimney and given mean temperature of chimney gases_______________?

• 1. decreases with increase in outside air temperature
• 2. increases with increase in outside air temperature
• 3. remains the same irrespective of outside air temperature
• 4. may increase or decrease with increase in outside air temperature

Question: In a boiler installation the natural draught is produced_____________?

• 1. due to the fact that furnace gases being light go through the chimney giving place to cold air from outside to rush in
• 2. due to the fact that pressure at the grate due to cold column is higher than the pressure at the chimney base due to hot column
• 3. due to the fact that at the chimney top the pressure is more than its environmental pressure
• 4. all of the above