Govt Exams Mock Test FREE | Online Quiz Competition

Q1. What is the function of a VFD’s “auto-tuning”?

It automatically adjusts the VFD’s parameters to optimize the performance of the electric motor

It automatically adjusts the VFD’s parameters to optimize the energy efficiency of the system

It automatically adjusts the VFD’s parameters to optimize the VFD’s protection functions

It automatically adjusts the VFD’s parameters to optimize the VFD’s monitoring functions

Q2. If a VFD is supplying a 3-phase motor with a voltage of 400V at a frequency of 50 Hz, what will be the voltage at 30 Hz assuming linear V/f control?

100 V

200 V

240 V

666 V

Q3. A single phase fully controlled dual converter uses _________ Thyristors.

2

8

4

6

Q4. Which semiconductor device acts like a diode and two transistors?

SCR

UJT

Triac

Diac

Q5. In case of a four quadrant converter, there should be

Two full convertors in series

Two full convertors connected back to back

Two full convertors in parallel

Two semi convertors connected in parallel

Q6. What is the term used to describe the process of converting DC to AC in a VFD?

Rectification

Inversion

Conversion

Modulation

Q7. DIAC and TRIAC both are semiconductor devices and conduct in

Both conducts in forward direction

DIAC conducts in forward direction and TRIAC conducts in reverse direction

Both conducts in reverse direction

Both conduct in either direction.

Q8. An ammeter is a

absolute instrument

recording instrument

integrating instrument

secondary instrument

Q9. Tangent galvanometer is used to measure

Steady Current

Current Impulses

Magnetic Moments of Bar

Earth’s Magnetic Field

Q10. An (0 V-100 V) MC voltmeter with an internal resistance of \(2\:\Omega\) is used to measure voltage of up to 200 V. The additional resistance to be connected in series with volmeter is \(_{-----------}\).

\(2\:\Omega\)

\(2000\:\Omega\)

\(200\:\Omega\)

\(20\:\Omega\)

Quiz

Year 2024

November
Week # 4 Quiz 2

Q1. What is the function of a VFD’s “auto-tuning”?

Q2. If a VFD is supplying a 3-phase motor with a voltage of 400V at a frequency of 50 Hz, what will be the voltage at 30 Hz assuming linear V/f control?

Q3. A single phase fully controlled dual converter uses _________ Thyristors.

Q4. Which semiconductor device acts like a diode and two transistors?

Q5. In case of a four quadrant converter, there should be

Q6. What is the term used to describe the process of converting DC to AC in a VFD?

Q7. DIAC and TRIAC both are semiconductor devices and conduct in

Q8. An ammeter is a

Q9. Tangent galvanometer is used to measure

Q10. An (0 V-100 V) MC voltmeter with an internal resistance of \(2\:\Omega\) is used to measure voltage of up to 200 V. The additional resistance to be connected in series with volmeter is \(_{-----------}\).

Quiz

Year 2024

November Week # 4 Expire on 21 Dec 2024

December Week # 1 Expire on 31 Dec 2024

December Week # 2 Expire on 07 Jan 2025

December Week # 3 Expire on 14 Jan 2025

November Week # 4 Quiz 2

Q1. What is the function of a VFD’s “auto-tuning”?

Q2. If a VFD is supplying a 3-phase motor with a voltage of 400V at a frequency of 50 Hz, what will be the voltage at 30 Hz assuming linear V/f control?

Q3. A single phase fully controlled dual converter uses _________ Thyristors.

Q4. Which semiconductor device acts like a diode and two transistors?

Q5. In case of a four quadrant converter, there should be

Q6. What is the term used to describe the process of converting DC to AC in a VFD?

Q7. DIAC and TRIAC both are semiconductor devices and conduct in

Q8. An ammeter is a

Q9. Tangent galvanometer is used to measure

Q10. An (0 V-100 V) MC voltmeter with an internal resistance of \(2\:\Omega\) is used to measure voltage of up to 200 V. The additional resistance to be connected in series with volmeter is \(_{-----------}\).

Record & Track Your Performance

November
Week # 4 Quiz 2