Space Interview Questions and Answers

It has three sections basic aptitude only

Q1. What are the forces acting on a rocket?
Ans. 
Forces acting on a rocket include thrust, weight, drag, and lift.
• Thrust is the force propelling the rocket forward.

• Weight is the force pulling the rocket down due to gravity.

• Drag is the resistance force acting opposite to the rocket's motion.

• Lift is the aerodynamic force generated by the rocket's shape to counteract weight.

• Other forces may include gravity, air resistance, and external forces.
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Q2. Explain Stress strain curve
Ans. 
Stress strain curve shows the relationship between stress (force applied) and strain (resulting deformation) in a material.
• Stress strain curve is a graphical representation of how a material behaves under loading.

• It typically shows the stress on the y-axis and strain on the x-axis.

• The curve usually consists of three main regions: elastic deformation, plastic deformation, and fracture.

• Elastic deformation is the initial ...read more
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Q3. Modes of heat transfer
Ans. 
Modes of heat transfer include conduction, convection, and radiation.
• Conduction: Heat transfer through direct contact between particles or objects (e.g. touching a hot pan)

• Convection: Heat transfer through the movement of fluids or gases (e.g. boiling water)

• Radiation: Heat transfer through electromagnetic waves (e.g. feeling the warmth of the sun)
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Q4. What is viscosity
Ans. 
Viscosity is a measure of a fluid's resistance to flow.
• Viscosity is often described as the thickness or stickiness of a fluid.

• It is influenced by factors such as temperature and pressure.

• High viscosity fluids flow slowly, while low viscosity fluids flow quickly.

• Examples of high viscosity fluids include honey and molasses, while water has low viscosity.
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Q5. Difference between ductile and brittle material using stress strain curve
Ans. 
Ductile materials exhibit large deformation before failure, while brittle materials fail suddenly without significant deformation.
• Ductile materials show a gradual increase in stress followed by necking before failure.

• Brittle materials have a steep stress-strain curve and fail abruptly without warning.

• Examples of ductile materials include metals like copper and aluminum.

• Examples of brittle materials include ceramics and
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