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

76)   

 In SMPS-based layouts, isolation between input and output is provided by: 

A.
B.
C.
D.
Answer: C
77)   

 Which SMPS topology is ideal for low power, isolated outputs?

A.
B.
C.
D.
Answer: C
78)   

The purpose of a sync pulse in a TV signal is to:

A.
B.
C.
D.
Answer: C
79)   

 The LED backlight in LED TVs is controlled by: 

A.
B.
C.
D.
Answer: C
80)   

 The role of the microcontroller in an online UPS is to:

A.
B.
C.
D.
Answer: C
81)   

 In an automatic electric iron, which material is typically used in the bimetallic strip?

A.
B.
C.
D.
Answer: D
82)   

Which of the following appliances uses resistive heating elements?

A.
B.
C.
D.
Answer: B
83)   

 The electric buzzer produces sound using:

A.
B.
C.
D.
Answer: C
84)   

  Which device detects over-temperature in a geyser?

A.
B.
C.
D.
Answer: C
85)   

 In a control panel for DC generator, which component is used for speed control? 

A.
B.
C.
D.
Answer: A
86)   

 A compound motor layout includes both:

A.
B.
C.
D.
Answer: B
87)   

  Earthing ensures that:

A.
B.
C.
D.
Answer: C
88)   

 What is used in pipe earthing to reduce soil resistance?

A.
B.
C.
D.
Answer: C
89)   

 A 3-point starter protects the motor from:

A.
B.
C.
D.
Answer: C
90)   

  In a squirrel cage motor circuit diagram, which part is not accessible?

A.
B.
C.
D.
Answer: A
91)   

 In the block diagram of a UPS, which unit charges the battery?

A.
B.
C.
D.
Answer: A
92)   

 A DSO captures fast signals because it uses:

A.
B.
C.
D.
Answer: C
93)   

 Which system uses both solar and grid supply simultaneously?

A.
B.
C.
D.
Answer: C
94)   

Which of the following capacitors is polarized?

A.
B.
C.
D.
Answer: B
95)   

 A resistor with color bands of brown-black-red indicates:

A.
B.
C.
D.
Answer: B
96)   

 SMPS circuits are preferred over linear power supplies because they:

A.
B.
C.
D.
Answer: C
97)   

 Which of the following ICs is a function generator?

A.
B.
C.
D.
Answer: B
98)   

 UPS is used in critical systems because it provides:

A.
B.
C.
D.
Answer: C
99)   

 Which communication system uses spread spectrum and unique codes for users? 

A.
B.
C.
D.
Answer: B
100)   

 Microcontroller IC 8051 includes which component internally?LCD screen 

A.
B.
C.
D.
Answer: C