Sample Exam 11 a
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This document is a quiz on materials science and electronics for students at Al Riffa High School For Girls. It contains multiple choice, true/false, and short answer questions testing knowledge of material properties like strength, hardness, and conductivity. It also covers electrical components and circuits, asking students to identify parts of diagrams, applications of devices like relays and timers, and perform calculations using Ohm's law and circuit concepts. The quiz is assessing understanding of materials science and basic electronics.
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Sample Exam 11 a
- 1. Al Riffa High School For Girls للبنات الثانوية الرفاع مدرسة Page 1 Creative Design & Innovation (CDI) Revision-11A 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 High School 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) Ferrous metals don’t contain iron a. True b. False
- 3. Al Riffa High School 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 ”. -------------------------------------------------------------------------------------------------------------------------- --------------------------------------------------------------------------------------------------------------------------
- 4. Al Riffa High School For Girls للبنات الثانوية الرفاع مدرسة Page 4 2) Name the parts of a Relay system? -------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------- 3) Give an application of the 555timer. -------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------- 4) What is an alloy and what advantages does it have over pure metal? -------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------- 5) Name 3 metal treatment methods, and briefly describe each one. -------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------- 6) State whether the devices and products below are ‘analogue’ or ‘digital’. • An MP3 Player is a(n) analogue / digital device. • A Microphone is a(n) analogue / digital device. • A computer chip is a(n) analogue / digital device. 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) Calculate the gain of an op-amp where Rf = 15 kΩ and Rin = 220 Ω? -------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------- Good Luck