ema topic-13&14

Which instrument combines several measurement functions like voltage, current, and resistance?

• Tachometer

• Insulation resistance tester

• Multimeter

• Clamp meter

What is the maximum allowable voltage a clamp meter should not exceed when measuring AC voltage?

• 250V

• 500V

• 1000V

• 600V

What condition occurs when one line of a three-phase supply is open-circuited?

• Overloading

• Short-circuiting

• Single-phasing

• Ground fault

What does an insulation resistance tester (Megger) measure in motors?

• Continuity between windings

• Voltage output

• Insulation resistance

• Shaft rotation speed

What is the normal operating voltage range for a three-phase motor according to the documents?

• 250-300 V

• 400-500 V

• 380-420 V

• 300-350 V

What happens when a motor operates above its rated capacity?

• Single-phasing occurs

• Overloading occurs

• Open circuit happens

• Ground fault happens

What safety precaution should always be followed when using a digital multimeter?

• Always exceed the input limit

• Always measure current with voltage terminals

• Always check the function switch is set correctly

• Always perform tests on live circuits

What fault occurs if two or more turns of the stator windings make contact with each other?

• Open circuit

• Ground fault

• Single-phasing

• Short circuit

Which type of tester is used to measure the speed of rotation in RPM?

• Multimeter

• Insulation resistance tester

• Tachometer

• Clamp meter

When performing a continuity test, what tool is typically used?

• Tachometer

• Clamp meter

• Multimeter

• Insulation tester