🔌 CCHM Set-3 | Capacitors, Logic Gates & Computer Components

Electrolytic Polarized • AND Gate LOW when any LOW • NAND Universal Gate • Transistor Amplifies TRUE • Capacitance Increases with Plate Area • Ohm Unit • Decimal 10 Voltage Levels • 2 Capacitor Types • CRT 1024x768 • Dual Core 775 pins TRUE • Volatile Memory • VGA 15 pin • DIMM Slot • IRQ from BIOS • DDR RAM • CCFL in LCD • LGA ≠ PGA • CMOS +3V • CD-ROM Color Books

Electrolytic AND Gate LOW NAND Universal Transistor Capacitance Ohm Unit CRT 1024x768 Dual Core 775 Volatile Memory DIMM Slot

20 Questions (Q41-Q60) | Capacitors, Logic Gates & Components | Certificate in Computer Hardware Maintenance

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41. Which of the following capacitors is polarized?

  • a) plastic-film
  • b) mica
  • c) ceramic
  • d) electrolytic
Answer: D - Electrolytic capacitors are polarized, meaning they have positive and negative terminals and must be connected correctly.

42. The output of an AND gate is LOW ________.

  • a) when any input is LOW
  • b) all the time
  • c) when all inputs are HIGH
  • d) when any input is HIGH
Answer: A - AND gate output is LOW when any input is LOW. Output is HIGH only when all inputs are HIGH.

43. Universal gate are_______

  • a) AND
  • b) OR
  • c) EX-OR
  • d) NAND
Answer: D - NAND and NOR are universal gates because any Boolean function can be implemented using only these gates.

44. Transistor amplify the signal_______

  • a) TRUE
  • b) FALSE
  • c) N.A.
  • d) N.A.
Answer: A - TRUE. Transistors can amplify weak signals by using a small input current/voltage to control a larger output current.

45. When the plate area of a capacitor increases_______

  • a) the capacitance increases
  • b) the capacitance is unaffected
  • c) the voltage it can withstand increases
  • d) the capacitance decreases
Answer: A - Capacitance is directly proportional to plate area (C = εA/d). Larger plate area = higher capacitance.

46. RESISTANCE Unit is_______

  • a) OHM
  • b) FARAD
  • c) MICRO FARAD
  • d) JUL
Answer: A - The unit of electrical resistance is OHM (Ω), named after German physicist Georg Simon Ohm.

47. The decimal code system used ten levels of voltage_______

  • a) TRUE
  • b) FALSE
  • c) N.A.
  • d) N.A.
Answer: A - TRUE. Decimal code (BCD) theoretically uses ten voltage levels to represent digits 0-9, though digital uses binary.

48. (Ohm) is the Unit of ___________?

  • a) Resistance (R)
  • b) Inductive Reactance (XL)
  • c) Capacitive Reactance (Xc)
  • d) All of the above
Answer: D - Ohm is the unit of Resistance (R), Inductive Reactance (XL), and Capacitive Reactance (Xc) - all measured in ohms.

49. Types of Capacitors are_______

  • a) 1
  • b) 3
  • c) 2
  • d) 4
Answer: C - There are 2 main types of capacitors: Polarized (electrolytic, tantalum) and Non-polarized (ceramic, mica, film).

50. _______resolution is best for CRT monitor

  • a) 800 x 1000
  • b) 1366 x 784
  • c) 1024 x 768
  • d) 1086 x 724
Answer: C - 1024 x 768 resolution is considered best/standard for CRT monitors with 4:3 aspect ratio.

51. Dual core 2Ghz cpu consist 775 pins_______

  • a) TRUE
  • b) FALSE
  • c) N.A.
  • d) N.A.
Answer: A - TRUE. Intel Dual Core 2GHz processors (like Core 2 Duo) use LGA 775 socket with 775 pins.

52. Memory that loses its contents when power is lost is_______

  • a) static
  • b) random
  • c) nonvolatile
  • d) volatile
Answer: D - Volatile memory (like RAM) loses its contents when power is removed. Non-volatile memory retains data (ROM, SSD).

53. VGA port are_______

  • a) 16 pin
  • b) 18 pin
  • c) 15 pin
  • d) 20 pin
Answer: C - VGA (Video Graphics Array) port has 15 pins arranged in 3 rows of 5 pins (DE-15 connector).

54. DIMM is a_______

  • a) Socket
  • b) Slot
  • c) Port
  • d) N.A.
Answer: B - DIMM (Dual In-line Memory Module) is a memory slot on the motherboard where RAM modules are inserted.

55. When installing PCI NICs you can check the IRQ availability by looking at_______

  • a) dip switches
  • b) CONFIG.SYS
  • c) jumper settings
  • d) motherboard BIOS
Answer: D - IRQ availability can be checked in the motherboard BIOS or Device Manager in Windows.

56. DDR IS A_______

  • a) HDD
  • b) FDD
  • c) CPU
  • d) RAM
Answer: D - DDR (Double Data Rate) is a type of RAM (SDRAM) that transfers data on both rising and falling clock edges.

57. CCFL tube used in _______ monitor.

  • a) CRT
  • b) LED
  • c) LCD
  • d) N.A.
Answer: C - CCFL (Cold Cathode Fluorescent Lamp) tubes are used as backlights in older LCD monitors.

58. LGA and PGA socket are same_______

  • a) TRUE
  • b) FALSE
  • c) N.A.
  • d) N.A.
Answer: B - FALSE. LGA (Land Grid Array) has pins on socket; PGA (Pin Grid Array) has pins on processor - they are different.

59. CMOS Battery Voltage are_______

  • a) -3 volt
  • b) +3 volt
  • c) +/-3 volt
  • d) None of this
Answer: B - CMOS battery voltage is typically +3 volts (CR2032 lithium coin cell battery).

60. The terms 'red book', 'yellow book', and 'orange book' refer to_______

  • a) SCSI
  • b) ide
  • c) floppy drive technology
  • d) CD-ROM standards
Answer: D - Red Book (CD-DA), Yellow Book (CD-ROM), and Orange Book (CD-R/CD-RW) are CD-ROM standards by Philips/Sony.
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🔌 CCHM Certificate in Computer Hardware Maintenance Exam Prep | Master Capacitors, Logic Gates, CPU Sockets & Computer Components

💾 Ace Your Certificate in Computer Hardware Maintenance (CCHM) Certification Exam! PCBooks delivers expert-curated MCQs covering Electrolytic capacitors polarized, AND gate output LOW when any input LOW, NAND universal gate, Transistor amplifies signal TRUE, Capacitance increases with plate area, Resistance unit OHM, Decimal code system 10 voltage levels TRUE, Ohm unit for Resistance Inductive Reactance Capacitive Reactance, 2 types of capacitors polarized/non-polarized, CRT best resolution 1024x768, Dual Core 2Ghz CPU 775 pins TRUE, Volatile memory loses data, VGA port 15 pins, DIMM is memory slot on motherboard, IRQ from motherboard BIOS, DDR Double Data Rate RAM, CCFL tube in LCD monitor backlight, LGA and PGA sockets different FALSE, CMOS battery +3 volts, Red Yellow Orange books CD-ROM standards. Specifically designed for Certificate in Computer Hardware Maintenance Certification and computer technicians.

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  • ✔️ Logic gates & universal gates
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🔋 Capacitors & Logic Gates MCQs

  • 👉 Electrolytic Capacitor – Polarized, must be connected correctly
  • 👉 AND Gate Output – LOW when any input is LOW
  • 👉 NAND Gate – Universal gate (can create any logic function)
  • 👉 Transistor Amplification – TRUE, small input controls larger output
  • 👉 Capacitance vs Plate Area – Directly proportional, larger area = higher capacitance
  • 👉 Resistance Unit – OHM (Ω)
  • 👉 Ohm Unit Applications – Resistance (R), Inductive Reactance (XL), Capacitive Reactance (Xc)

🖥️ CPU, RAM & Motherboard Components MCQs

  • 🎯 Dual Core CPU Pins – 775 pins (LGA 775 socket) – TRUE
  • 🎯 Volatile Memory – Loses data when power is lost (RAM)
  • 🎯 DIMM Slot – Memory slot for RAM modules
  • 🎯 IRQ Source – Checked from motherboard BIOS
  • 🎯 DDR RAM – Double Data Rate SDRAM
  • 🎯 LGA vs PGA – Different socket types (FALSE same)
  • 🎯 CMOS Battery – +3 volts (CR2032)
  • 🎯 North Bridge – Chipset connecting CPU to RAM and graphics

📺 Display Technologies & Storage Standards MCQs

  • 👉 CRT Best Resolution – 1024 x 768 pixels (4:3 aspect ratio)
  • 👉 VGA Port Pins – 15 pins (DE-15 connector)
  • 👉 CCFL Tube – Used as backlight in older LCD monitors
  • 👉 CD-ROM Standards – Red Book (CD-DA), Yellow Book (CD-ROM), Orange Book (CD-R/CD-RW)
  • 👉 SATA Port – Used on motherboard for storage devices
  • 👉 PS/2 Port – Keyboard and mouse port on motherboard
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🔍 CCHM Exam Keywords: electrolytic capacitors polarized, AND gate low when any input low, NAND universal gate, transistor amplifies signal true, capacitance increases with plate area, resistance unit ohm, decimal code system 10 voltage levels true, ohm unit for resistance inductive capacitive reactance, 2 types of capacitors polarized non polarized, CRT best resolution 1024x768, dual core 2ghz cpu 775 pins true, volatile memory loses data, VGA port 15 pin connector, DIMM memory slot motherboard, IRQ from motherboard BIOS, DDR double data rate RAM, CCFL tube LCD monitor backlight, LGA and PGA sockets different false, CMOS battery voltage plus 3 volts, red book yellow book orange book CD ROM standards, computer hardware maintenance set 3, CPU socket types MCQ, pcbooks CCHM set 3.