Question: Which of the following are integrating instruments ?

• 1. Ammeters
• 2. Voltmeters
• 3. Wattmeters
• 4. Ampere-hour and watt-hour meters

Question: The spring material used in a spring control device should have the following property?

• 1. Should be non-magnetic
• 2. Most be of low temperature co-efficient
• 3. Should have low specific resistance
• 4. All of the above

Question: A moving-coil permanent-magnet instrument can be used as ____________by using a low resistance shunt?

• 1. ammeter
• 2. voltmeter
• 3. flux-meter
• 4. ballistic galvanometer

Question: Which of the following essential features is possessed by an indicating instrument?

• 1. Deflecting device
• 2. Controlling device
• 3. Damping device
• 4. All of the above

Question: Which of the following devices may be used for extending the range of instruments ?

• 1. Shunts
• 2. Multipliers
• 3. Current transformers
• 4. All of the above

Question: A __________ device prevents the oscillation of the moving system and enables the latter to reach its final position quickly___________?

• 1. deflecting
• 2. controlling
• 3. damping
• 4. any of the above

Question: Which of the following instruments indicate the instantaneous value of the electrical quantity being measured at the time at which it is being measured ?

• 1. Absolute instruments
• 2. Indicating instruments
• 3. Recording instruments
• 4. Integrating instruments

Question: Which of the following essential features is possessed by an indicating instrument ?

• 1. Deflecting device
• 2. Controlling device
• 3. Damping device
• 4. All of the above

Question: Which of the following properties a damping oil must possess ?

• 1. Must be a good insulator
• 2. Should be non-evaporating
• 3. Should not have corrosive action upon the metal of the vane
• 4. All of the above

Question: If the power level of an amplifier reduces to half, the db gain will fall by___________?

• 1. 5 db
• 2. 2 db
• 3. 10 db
• 4. 3 db