General in Basic Science And Engineering : Practice MCQ Questions & Answers with Explanations

Conducting regular safety inspections. The best and most reliable way to identify workplace hazards is to perform regular safety inspections. These help in detecting unsafe conditions before they cause harm, checking machines and tools for risks, ensuring safety standards are followed, and preventing accidents rather than reacting to them.

A digital signature is a cryptographic mechanism that acts as a virtual fingerprint, uniquely identifying the sender and ensuring the content has not been tampered with during transmission. It confirms the sender's identity and guarantees data integrity — making it an essential tool in secure electronic communication.

Only statement 1 is true. Geometric shapes are indeed defined as enclosed figures formed by connecting points, lines, or curves, and they can be squares, circles, triangles, and more. Statement 2 is false because geometric shapes are not open-ended — they are enclosed.

4.8 g/cm³. Density = Mass / Volume = 5.74 / 1.2 = 4.7833... g/cm³.

Aluminium heats up quickly and evenly, which helps in faster cooking. That is why pressure cookers, pans, and utensils are commonly made of aluminium. It is lightweight, cheap, and a very good conductor of heat.

Laboratory thermometer. Laboratory thermometers work on the principle of thermal expansion. A liquid (usually mercury or alcohol) is contained within a narrow capillary tube.