u930973931_answers

1. The first law of thermodynamics is based on the principle of: a) Conservation of mass b) Conservation of energy c) Conservation of momentum d) Conservation of temperature Answer: b) Conservation of energy 2. The unit of specific heat in the SI system is: a) Joule b) Watt c) Joule per kilogram per Celsius degree … Read more

1. Fluid mechanics is the study of: a) Gases only b) Liquids only c) Both gases and liquids d) Solids only Answer: c) Both gases and liquids 2. The unit of dynamic viscosity in the SI system is: a) Pascal b) Poise c) Pascal-second d) Newton-second Answer: c) Pascal-second 3. The property of a fluid … Read more

Stress is defined as: a) Force per unit volume b) Force per unit length c) Force per unit area d) Force per unit mass Answer: c) Force per unit area 2. The unit of stress in the SI system is: a) Newton b) Pascal c) Joule d) Watt Answer: b) Pascal 3. Strain is defined … Read more

Which of the following is a scalar quantity in mechanics? A. Force B. Velocity C. Acceleration D. Mass Answer: D The resultant of two forces acting at a point is maximum when the angle between them is: A. 0 degrees B. 45 degrees C. 90 degrees D. 180 degrees Answer: C If three forces acting … Read more

1. Which of the following is a scalar quantity? a) Velocity b) Force c) Speed d) Acceleration Answer: c) Speed 2. In a four-stroke engine, how many times does the crankshaft rotate during one complete cycle? a) 1 b) 2 c) 3 d) 4 Answer: b) 2 3. What is the unit of viscosity? a) … Read more

What is the primary function of a diode in a power electronic circuit? a) Voltage regulation b) Signal amplification c) Current rectification d) Frequency modulation Answer: c) Current rectification Which of the following devices is commonly used for switching applications in power electronics? a) Bipolar Junction Transistor (BJT) b) Light Emitting Diode (LED) c) Zener … Read more

What is the primary difference between a microcontroller and a microprocessor? a) Microcontrollers have higher clock speeds than microprocessors. b) Microcontrollers have built-in memory and peripherals. c) Microprocessors have built-in ADCs and DACs. d) Microprocessors are smaller in size. Answer: b) Microcontrollers have built-in memory and peripherals. Which of the following components is typically integrated … Read more

What is the unit of electrical resistance? a) Ohm b) Volt c) Ampere d) Watt Answer: a) Ohm Which of the following devices is used to measure electric current? a) Voltmeter b) Ammeter c) Ohmmeter d) Wattmeter Answer: b) Ammeter What is the SI unit of capacitance? a) Ohm b) Farad c) Henry d) Tesla … Read more

What is the base of a binary number system? a) 2 b) 8 c) 10 d) 16 Answer: a) 2 Which of the following is a universal gate? a) AND gate b) OR gate c) NOT gate d) NAND gate Answer: d) NAND gate What is the binary equivalent of the decimal number 10? a) … Read more

What is the equivalent resistance of two 10-ohm resistors connected in series? A) 5 ohms B) 10 ohms C) 15 ohms D) 20 ohms Answer: D) 20 ohms What is the equivalent resistance of two 10-ohm resistors connected in parallel? A) 5 ohms B) 10 ohms C) 20 ohms D) 25 ohms Answer: A) 5 … Read more