Which option will replace the question mark? [Figure: see page 12 of source PDF]

A tank is converted to treat organic waste water from kitchen as shown in the figure below. Bio gas gets accumulated on top part of the tank. Which of the following options is a suitable location for drilling an air hole to maintain the water level inside the tank? [Figure: see p…

Parts of the letters have been hidden by vertical strips in the given options. Which option contains a meaningful word with correct spelling? [Figure: see page 13 of source PDF]

Which option will replace the question mark? [Figure: see page 13 of source PDF]

Given is the one side of a folded sheet of paper with green color on one side and red color on the other side. Find the correct option when this sheet is unfolded. Dotted lines represent the fold lines. [Figure: see page 13 of source PDF]

One square and 4 triangles given below are used to make shapes without overlapping. Among the options, which is the shape that CANNOT be made? [Figure: see page 14 of source PDF]

A glider toy as shown in the image below is usually made with Balsa wood. Due to the unavailability of Balsa wood, a student is considering an alternative material. Considering the density of the material that is required to make the fuselage, which will be the most suitable opti…

What is the internal mechanism for producing the wobbling head movement in the toy shown below? Assume that the toy needs to be mass manufactured. [Figure: see page 15 of source PDF]

A sequence of a man sleep walking is shown below. Which frame is incorrect? [Figure: see page 15 of source PDF]