List of top Practical and scientific knowledge Questions

Which of the following is / are TRUE for the strip of paper shown in the image?
A. It has two edges.
B. An ant can walk all over the surface of the strip without having to cross an edge.
C. A rotating belt that is similar to the strip of paper will have a uniform wear and tear.
D. This is an optical illusion that can be created as a 2D image but is not possible in 3D.

In the image below, gear 1 rotates in the direction of the arrow. Which of the statements is / are CORRECT?
A. 1 and 6 rotate in the same direction.
B. 3 and 6 rotate in the opposite direction.
C. 1 and 4 rotate in the opposite direction.
D. 2 and 6 rotate in the same direction.

The lost wax process is used for ______________.

An object was sharply focused and a photograph was taken using a camera. The photographer wants to blur the background (change the depth of field) in the next photograph. This can be achieved by changing the

You need to hang a large rectangular picture frame on a wall in an empty room. To ensure that it is vertical (and not tilted), which of the following will help you hang the picture correctly (not tilted)? (No additional items are to be used other than the ones specified in each of the options)

Which of the options matches the fruit and the leaf correctly? (the images are not to scale)

Which of the options is / are CORRECT?
A. The cap of a water bottle is tightened by rotating it in the clockwise direction (as seen from the top).
B. To turn on a tap, the tap head is rotated clockwise; to turn it off it is rotated counter-clockwise (as seen from the top).
C. To loosen a nut of a car wheel, a spanner is turned counter-clockwise (from the point of view of the person using the spanner).
D. The earth as seen from the North Pole rotates clockwise about its axis.

Which of the following is the hardest wood?

Hex codes are used to specify colours on the computer. What colour is the Hex Code CCCCCC?

Shutter speed is one of the parameters by which exposure of the image can be controlled. How does shutter speed control exposure?

Which of the options is/are correct according to pigment colour theory?

Different views of the cross section of a fish toy are shown here. The points P and Q are connected in such way that the fish tail waves. The grey colour gear and the green colour part are joined together. The rod is free to move depending on how it is connected to the green part. Which of
the option(s) will work to wave the tail?

The options show different configurations of refill bottles of mosquito repellent, for an atypical socket shown on the left. After fitting, the red mark on the refill bottle must align with the red mark on the machine. Which of the option(s) will allow all of the liquid to be consumed?

Identify the total number of differences in the images shown below.

Select the correct option which lists the animals appearing in the GIF.

Refer to all the sides of a vase shown below.

Select the correct order of sectional faces.

What is the function of these objects?

With reference to the image below, which of the statement(s) is/are false?

Which betel nut cutter will require less force to be applied to cut a betel nut? Consider the hinge points to be at the same line.

Which combination shows lunar eclipse?

Which of the option(s) is/are from the same font family (i.e. weight and/or width variations) of the words given below?

Shown below is a coconut broken into two pieces. Identify the correct representation(s) of the coconut.

In which of the option(s) dust-bin lids will open?

A boat is moving on the river and following the path as shown by the dashed line. Both the boatmen are facing front and rafting with equal force in the directions shown by the arrows in the options. Which of the options will help the boat to take a right turn?

Select the correct sunshade pattern on the illustrated structure. Assume Sun at 45 degree on left as shown.