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Sample Exam 12 g
This document is a quiz for a Creative Design & Innovation class at Al Riffa High School For Girls. It contains multiple choice, true/false, and short answer questions about engineering concepts like materials properties, electrical components, circuits, and electronics. Topics covered include conductors, insulators, parallel and series circuits, resistors, capacitors, transistors, relays, amplifiers, and the 555 timer. The quiz has parts testing knowledge of terms, diagrams, component identification, calculations using equations like Ohm's law, and explanations of how devices work.
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Sample Exam 12 g
- 1. Al Riffa HighSchool For Girls للبنات الثانوية الرفاع مدرسة Page 1 Creative Design & Innovation (CDI) Revision-12G Instructor: Fatima Adly Name: Grade: ( ) Date: Part 1: Choice the correct answer 1) The ability of a material to resist changing shape under force is: a. Strength b. Hardness c. Ductility 2) Toughness of a material refers to a. The ability of a material to bend and flex b. The ability to withstand tensile stress c. The ability of a material to withstand sudden impact before breaking 3) Which of the following materials is NOT a conductor of heat a. Copper b. Ceramic c. Brass 4) A material that allows some light to pass through is called: a. Translucent material b. Transparent material c. Opaque material 5) Which of the following is true about parallel circuits a. The current is the same everywhere in the circuit b. One path for the current c. The voltage across the loop is the same 6) In an LDR the resistance changes when: a. The temperature changes b. Light intensity changes c. Pressure changes 7) An electric safety device that protects circuits from excessive current a. Relay b. Transistor c. Fuse
- 2. Al Riffa HighSchool For Girls للبنات الثانوية الرفاع مدرسة Page 2 Part 2: True or False paPart 3: Match the type of mechanical force with its name 1) Plasticity refers to the ability of the material to bend a. True b. False 2) A variable resistor can change electrical current a. True b. False 3) In series circuit, if one bulb blows the rest will work a. True b. False 4) Battery is an AC power supply a. True b. False 5) Relays work as electromagnetic switches a. True b. False 6) Current is measured in volts a. True b. False
- 3. Al Riffa HighSchool For Girls للبنات الثانوية الرفاع مدرسة Page 3 Part 4(a): Label the diagram Part 4(b): Name component and draw its schematic symbol -------------------- -------------------- -------------------- Part 5: Short Answer Questions. 1) Using 7-segment display. What segments should be on to display the letter “S ”. -------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------- 2) Describe how capacitors work? And how to change the capacitance value? -------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------- 3) Find value of the capacitor -------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------- --------------------------------------------------------------------------------------------------------------------------
- 4. Al Riffa HighSchool For Girls للبنات الثانوية الرفاع مدرسة Page 4 4) What is the function of the transistor? Name its three terminals -------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------- 5) Name the parts of a Relay system? -------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------- 6) Compare between the 2 inputs of an amplifier. -------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------- 7) Give an application of the 555timer. -------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------- Part 6: Calculations 1) Using ohm’s law. If the value of the resistor is 10kΩ and the current is 7.5mA, find the value of the voltage? -------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------- 2) If the power of a kettle is 0.3kW and the voltage is 240V, calculate the fuse rating? -------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------- 3) Find the value of the voltage knowing that the capacitance value is 220nF, and the charge stored is 1.1mC? -------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------- 4) If an input current of 2mA is applied and the amplified current is 3A, find out the gain of the amplifier? -------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------- Good Luck