Mechanical Engineering

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Q. What is the main advantage of using the extrusion process?
  • A. High precision in dimensions
  • B. Ability to create complex cross-sections
  • C. Low material waste
  • D. Fast production rates
Q. What is the main disadvantage of casting?
  • A. High material waste
  • B. Limited to simple shapes
  • C. Long lead times
  • D. Potential for defects like porosity
Q. What is the main disadvantage of sand casting?
  • A. High production speed
  • B. Limited to small parts
  • C. Poor surface finish
  • D. High material waste
Q. What is the main disadvantage of the forming process?
  • A. High material waste
  • B. Limited to certain materials
  • C. Requires high energy input
  • D. Slow production rates
Q. What is the main disadvantage of traditional machining methods?
  • A. High precision
  • B. Material waste
  • C. Low production speed
  • D. Versatility
Q. What is the main function of a heat exchanger?
  • A. To increase the temperature of a fluid
  • B. To transfer heat between two or more fluids
  • C. To convert thermal energy into mechanical energy
  • D. To store thermal energy
Q. What is the maximum efficiency of a Carnot engine operating between two heat reservoirs at temperatures T_H and T_C?
  • A. 1 - T_C/T_H
  • B. T_H/T_C
  • C. T_H - T_C
  • D. T_C/T_H
Q. What is the maximum efficiency of a Carnot engine operating between two temperatures?
  • A. 100%
  • B. Depends on the working fluid
  • C. 1 - (T_c/T_h)
  • D. 1 - (T_h/T_c)
Q. What is the modulus of elasticity?
  • A. The ratio of stress to strain
  • B. The ratio of strain to stress
  • C. The ratio of load to deflection
  • D. The ratio of deflection to load
Q. What is the moment of a force about a point?
  • A. Force times distance
  • B. Force divided by distance
  • C. Force times angle
  • D. Force times time
Q. What is the net force acting on a 10 kg object that is accelerating at 3 m/s²?
  • A. 30 N
  • B. 10 N
  • C. 3 N
  • D. 0 N
Q. What is the net force acting on a 5 kg object that is accelerating at 2 m/s²?
  • A. 10 N
  • B. 5 N
  • C. 2 N
  • D. 15 N
Q. What is the Poisson's ratio?
  • A. The ratio of lateral strain to axial strain
  • B. The ratio of axial strain to lateral strain
  • C. The ratio of stress to strain
  • D. The ratio of strain to stress
Q. What is the primary function of a heat exchanger?
  • A. To store heat
  • B. To transfer heat between two or more fluids
  • C. To generate electricity
  • D. To cool a fluid
Q. What is the primary material removal mechanism in machining?
  • A. Melting
  • B. Deformation
  • C. Cutting
  • D. Joining
Q. What is the primary material used in additive manufacturing?
  • A. Metal
  • B. Plastic
  • C. Ceramic
  • D. Composite
Q. What is the primary mechanism of heat transfer in conduction?
  • A. Movement of fluid
  • B. Direct contact of particles
  • C. Radiation of energy
  • D. Phase change
Q. What is the primary purpose of a heat engine?
  • A. To convert heat into work.
  • B. To convert work into heat.
  • C. To increase the temperature of a substance.
  • D. To store thermal energy.
Q. What is the primary purpose of a heat exchanger?
  • A. To increase temperature
  • B. To transfer heat between two fluids
  • C. To convert heat to work
  • D. To store thermal energy
Q. What is the primary purpose of a mold in casting?
  • A. To shape the molten material
  • B. To cool the material
  • C. To add color to the material
  • D. To remove impurities
Q. What is the primary purpose of casting in manufacturing?
  • A. To shape materials using heat and pressure
  • B. To create complex shapes by pouring liquid metal into a mold
  • C. To join two or more materials together
  • D. To remove material from a solid block
Q. What is the primary purpose of machining in manufacturing?
  • A. To shape materials using heat
  • B. To remove material to achieve desired dimensions
  • C. To join two or more parts together
  • D. To create a part layer by layer
Q. What is the primary purpose of the forming process in manufacturing?
  • A. To remove material from a workpiece
  • B. To shape materials without removing material
  • C. To join two or more materials together
  • D. To add material layer by layer
Q. What is the primary purpose of the Rankine cycle?
  • A. To convert thermal energy into mechanical work
  • B. To increase the entropy of a system
  • C. To cool a substance
  • D. To condense steam
Q. What is the primary purpose of welding in manufacturing?
  • A. To join materials together
  • B. To cut materials
  • C. To shape materials
  • D. To coat materials
Q. What is the primary shielding gas used in MIG welding?
  • A. Argon
  • B. Carbon dioxide
  • C. Helium
  • D. Nitrogen
Q. What is the purpose of a riser in a casting mold?
  • A. To provide a pathway for molten metal
  • B. To allow for gas escape
  • C. To supply additional molten metal during solidification
  • D. To cool the metal faster
Q. What is the purpose of a tool path in CNC machining?
  • A. To determine the material type
  • B. To outline the cutting tool's movement
  • C. To set the machine's temperature
  • D. To join different parts
Q. What is the purpose of the die in the stamping process?
  • A. To heat the material
  • B. To shape the material
  • C. To cool the material
  • D. To join materials
Q. What is the relationship between heat transfer and temperature difference in heat transfer basics?
  • A. Heat transfer is independent of temperature difference.
  • B. Heat transfer increases with temperature difference.
  • C. Heat transfer decreases with temperature difference.
  • D. Heat transfer is constant regardless of temperature difference.
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