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

1)   

Which component in an automatic electric iron is primarily responsible for regulating temperature? 

A.
B.
C.
D.
Answer: B
2)   

What is the function of the bimetallic strip in an electric bell? 

A.
B.
C.
D.
Answer: C
3)   

 In a geyser, which device prevents overheating of water?

A.
B.
C.
D.
Answer: C
4)   

 Which type of starter is used in a 3-phase induction motor to reduce starting current?

A.
B.
C.
D.
Answer: B
5)   

 Which protective device is commonly included in a DOL starter wiring diagram? 

A.
B.
C.
D.
Answer: B
6)   

 What is the purpose of an automatic voltage regulator in a generator layout? 

A.
B.
C.
D.
Answer: C
7)   

  Which type of motor is controlled using a three-point starter?

A.
B.
C.
D.
Answer: B
8)   

 What happens when one phase is lost in a 3-phase squirrel cage motor?

A.
B.
C.
D.
Answer: C
9)   

  In an online UPS, the battery is connected to the load:

A.
B.
C.
D.
Answer: B
10)   

 Which block is common in both inverters and UPS systems? 

A.
B.
C.
D.
Answer: C
11)   

  Which resistor type is preferred for high stability and precision applications? 

A.
B.
C.
D.
Answer: C
12)   

 A radial lead capacitor has leads coming out from:

A.
B.
C.
D.
Answer: B
13)   

 In a solar PV system, the charge controller prevents:

A.
B.
C.
D.
Answer: C
14)   

 What is the main advantage of a hybrid solar system over a standalone system? 

A.
B.
C.
D.
Answer: C
15)   

 What is the role of a buck converter?

A.
B.
C.
D.
Answer: C
16)   

 An IC-based AM transmitter is used to: 

A.
B.
C.
D.
Answer: C
17)   

 What is the main switching element in a flyback converter SMPS?

A.
B.
C.
D.
Answer: B
18)   

 In a CDMA mobile system, each user is separated by:

A.
B.
C.
D.
Answer: C
19)   

Which device connects two different networks and determines the best path?

A.
B.
C.
D.
Answer: C
20)   

Which topology has a central hub and all nodes connected to it?

A.
B.
C.
D.
Answer: B
21)   

 Which component is responsible for producing heat in an electric heater? 

A.
B.
C.
D.
Answer: C
22)   

  In a microwave oven, microwave generation is done by a: 

A.
B.
C.
D.
Answer: B
23)   

 An electric stove works on the principle of:

A.
B.
C.
D.
Answer: C
24)   

The sound in an electric buzzer is produced due to:

A.
B.
C.
D.
Answer: B
25)   

 In an earthing layout, the purpose of salt and charcoal is to:

A.
B.
C.
D.
Answer: D