81. Binary base are_______
- a) 1
- b) 3
- c) 2
- d) 4
Answer: C - Binary number system has base 2, using only two digits: 0 and 1.
82. 1 ma is equal to_______
- a) 0.001A
- b) 0.00001A
- c) 0.01A
- d) 0.1A
Answer: A - 1mA (milliampere) = 0.001 Amperes. 1mA = 1/1000 = 0.001A.
83. Battery output are_______
- a) dc
- b) Ac
- c) Both
- d) None of this
Answer: A - Battery output is DC (Direct Current), which flows in one constant direction.
84. Binary number are_______
- a) 0 & 1
- b) 0 & 3
- c) 0 & 6
- d) 0 & 8
Answer: A - Binary numbers consist of only two digits: 0 and 1.
85. A 100n capacitor in parallel with 10n produces_______
- a) 90n
- b) 100n
- c) 110n
- d) 120n
Answer: C - Capacitors in parallel add: Ctotal = C1 + C2 = 100nF + 10nF = 110nF.
86. 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.
87. A CRO is a_______
- a) Cathode Ray Output
- b) Cathode Ray Oscilloscope
- c) Cathode Ray Outer
- d) N.A.
Answer: B - CRO stands for Cathode Ray Oscilloscope, an electronic test instrument for displaying waveforms.
88. A 10k resistor in parallel with 10k produces_______
- a) 10k
- b) 5k
- c) 20k
- d) 30k
Answer: B - For two equal resistors in parallel: Rtotal = R/2 = 10kΩ/2 = 5kΩ.
89. A Dc voltage_______
- a) Rises and falls
- b) Is a sine wave
- c) Remain constant
- d) N.A.
Answer: C - DC (Direct Current) voltage remains constant over time, unlike AC which rises and falls.
90. In a diode schematic, the anode is represented by a(n):
- a) Triangle
- b) Vertical line
- c) Zig-zag line
- d) Element indicator
Answer: A - In a diode schematic symbol, the anode is represented by a triangle (arrow) pointing toward the cathode.
91. ASCII stands for_______
- a) American Serial Communication Interface
- b) Additive Signal Coupling Interface
- c) American Standard Code for Information Interchange
- d) None of the above
Answer: C - ASCII stands for American Standard Code for Information Interchange, a character encoding standard.
92. Condenser store electrical energy_______
- a) TRUE
- b) FALSE
- c) N.A.
- d) N.A.
Answer: A - TRUE. A condenser (capacitor) stores electrical energy in an electrostatic field between its plates.
93. IC is a_______
- a) DIODE
- b) RESISTANCE
- c) CONDUCTOR
- d) SEMI CONDUCTOR
Answer: D - IC (Integrated Circuit) is a semiconductor device that contains multiple electronic components on a single chip.
94. (A.B) is a _______
- a) OR Gate output
- b) NAND Gate output
- c) AND Gate output
- d) None of this
Answer: C - (A.B) represents AND gate output. Output is HIGH only when both inputs A and B are HIGH.
95. RS-232 is a standard that applies to:
- a) Serial ports
- b) Parallel ports
- c) Game ports
- d) Networks
Answer: A - RS-232 is a standard for serial communication ports (COM ports) for data transmission.
96. NO DISPLAY BEEP SOUND CHECK IS THERE IN_______
- a) CPU
- b) RAM
- c) Mother board
- d) Hard disk
Answer: B - No display with beep sound indicates RAM (memory) issues. Continuous beeps often indicate RAM problems.
97. Missing slot covers on a computer can cause?
- a) Over heat
- b) Power surges
- c) EMI
- d) Incomplete path for ESD
Answer: A - Missing slot covers disrupt proper airflow inside the case, causing overheating of components.
98. Mother Board stand by voltage is_______
- a) +12 volts
- b) +3.3 volts
- c) +5 volts
- d) -5 volts
Answer: C - Motherboard standby voltage (VSB) is +5 volts, which remains on even when computer is in sleep mode.
99. Number of pins A.T SMPS power connector_______
- a) 20
- b) 24
- c) 28
- d) 12
Answer: D - AT SMPS power connector has 12 pins (6+6) for older AT motherboards.
100. North Bridge used in_______
- a) Modem
- b) Mother Board
- c) Scanner
- d) None of this
Answer: B - North Bridge is a chipset component on the motherboard that connects CPU to RAM and graphics card.