MCQ - Mechanical TNPSC JTO
JTO - 551 - Engineering Drawing and Draughtsman - 551 - unit - 08 - Electrical Electronics and Network Components

26)   

 Which starter is used for large 3-phase motors and reduces voltage using transformer action? 

A.
B.
C.
D.
Answer: C
27)   

In compound motor layout diagrams, compound motors are preferred where: 

A.
B.
C.
D.
Answer: B
28)   

 In a three-phase switching circuit, what ensures balanced load distribution? 

A.
B.
C.
D.
Answer: D
29)   

 Which device is used to manually break a 3-phase circuit for maintenance?

A.
B.
C.
D.
Answer: C
30)   

 In a two-point starter, the field winding is: 

A.
B.
C.
D.
Answer: B
31)   

 In the block diagram of a DSO (Digital Storage Oscilloscope), which block converts analog signal to digital?

A.
B.
C.
D.
Answer: C
32)   

 In the block diagram of a function generator, the waveform is generated using a: 

A.
B.
C.
D.
Answer: B
33)   

 Metal oxide resistors are known for their:

A.
B.
C.
D.
Answer: C
34)   

 Which type of resistor is typically found in SMD (Surface Mount Device) packages? 

A.
B.
C.
D.
Answer: C
35)   

 In a grid-connected solar PV system, the grid-tie inverter must have:

A.
B.
C.
D.
Answer: C
36)   

 What is the role of SMPS in an LED TV?

A.
B.
C.
D.
Answer: C
37)   

 In LED driver circuits, current limiting is achieved using a: 

A.
B.
C.
D.
Answer: C
38)   

 Which of the following is used to filter ripple in SMPS?

A.
B.
C.
D.
Answer: C
39)   

 The purpose of a feedback loop in SMPS block diagram is to:

A.
B.
C.
D.
Answer: C
40)   

 Which microcontroller is commonly used in embedded control systems, including UPS and LED displays? 

A.
B.
C.
D.
Answer: D
41)   

 The thermostat in an electric iron works based on the principle of:

A.
B.
C.
D.
Answer: B
42)   

 In an electric stove, which material is commonly used for the heating element? 

A.
B.
C.
D.
Answer: C
43)   

Which one of the following is used in a fire alarm to detect smoke?

A.
B.
C.
D.
Answer: C
44)   

 What is the function of a control panel in a DC generator system? 

A.
B.
C.
D.
Answer: C
45)   

 The connection of a 3-phase alternator with load is made via:

A.
B.
C.
D.
Answer: B
46)   

 In earthing systems, plate earthing uses which metal plate typically?

A.
B.
C.
D.
Answer: A
47)   

  In a motor control circuit, the MCB is used for:

A.
B.
C.
D.
Answer: B
48)   

 A three-point starter includes a no-voltage coil to:

A.
B.
C.
D.
Answer: B
49)   

 Which block in the UPS helps convert DC back to AC?

A.
B.
C.
D.
Answer: C
50)   

 In the block diagram of a DSO, the vertical amplifier is used to:

A.
B.
C.
D.
Answer: B