Daily Static MCQs Quiz for UPSC, IAS, UPPSC/UPPCS, MPPSC. BPSC, RPSC & All State PSC Exams
Subject : Science and Technology
1. Consider the following statements regarding Scorpene submarines:
1. They use diesel electric propulsion systems, with the
ability to operate independently without refueling for approximately 50 days.
2. They are versatile submarines that can perform a range of tasks in coastal
and open waters whereas the primary objective of Cruise Missile Submarines is to
carry and launch cruise missiles.
3. They are designed for long-range strikes while Cruise Missile Submarines have
a limited range.
How many of the above statements is/are correct?
(a) Only one
(b) Only two
(c) All three
(d) None
Answer: (B)
Explanation: Scorpene submarines use diesel-electric propulsion systems, with the ability to operate independently without refueling for approximately 50 days. Scorpene submarines are versatile submarines that can perform a range of tasks in coastal and open waters whereas the primary objective of Cruise Missile Submarines is to carry and launch cruise missiles. Hence, statement 1 and 2 are correct.
Scorpene class submarines typically have a limited range, suited for operations in coastal and nearby open waters. Their weapons are designed for shorter-range engagements. Cruise Missile Submarines are designed for long-range strikes. Hence, statement 3 is incorrect.
2. With reference to Graphics Processing Units (GPUs), consider the following statements:
1. Graphics Processing Units (GPUs) are specialized
electronic circuits or processors designed to accelerate and enhance graphics
rendering tasks in computers, gaming consoles, and other devices.
2. CPUs are latency-oriented and task-parallel, while GPUs are
throughput-oriented and data-parallel.
Which of the above statements is/are correct?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
Answer: (C)
Explanation: The global surge in artificial intelligence (AI) has been fueled by the emergence of graphics processing units (GPUs). Graphics Processing Units (GPUs) are specialized electronic circuits or processors designed to accelerate and enhance graphics rendering tasks in computers, gaming consoles, and other devices. Graphics Processing Units (GPUs) have revolutionized AI globally. Originally for graphics tasks, GPUs excel in deep learning by executing parallel calculations, advancing AI models with larger datasets. CPUs are latency-oriented and task-parallel, while GPUs are throughput-oriented and data-parallel. GPUs' matrix operations make them ideal for AI. Hence, both statements are correct.
3. Consider the following statements regarding Hygroelectricity:
Statement I - Hygroelectricity is the generation of
electricity from the humidity of the air.
Statement II - The key to harvesting electricity from humid air lies in a
tiny device comprising two electrodes and a thin layer of material filled with
nanopores.
Which of the following is correct in respect of the above statements?
(a) Both Statement-I and Statement-II are correct and
Statement –II is the correct explanation of Statement-I.
(b) Both Statement-I and Statement-II are correct and Statement-II is not the
correct explanation for Statement-I.
(c) Statement-I is correct but Statement-II is incorrect
(d) Statement-I is incorrect but Statement-II is correct
Answer: (A)
Explanation: Hygroelectricity is the generation of electricity from the humidity of the air. It is a type of renewable energy that has the potential to be a major source of power in the future. The key to harvesting electricity from humid air lies in a tiny device comprising two electrodes and a thin layer of material filled with nanopores. Just as clouds create electrical charges and give rise to lightning bolts during storms, this revolutionary device converts air humidity into usable electricity. Unlike other renewable energy sources such as solar and wind, air humidity is continuously available, making it a sustainable reservoir of energy. Hence, both Statement-I and Statement-II are correct and Statement –II is the correct explanation of Statement-I.
4. Which of the following is/are cause/causes for the formation of rainbow?
1. Refraction
2. Dispersion
3. Reflection
How many of the above are correct?
(a) Only one
(b) Only two
(c) All three
(d) None
Answer: (C)
Explanation:
- A rainbow is a multi-colored arc that appears in the sky. Rainbows are formed by the refraction, dispersion and reflection of sunlight in water droplets.
- Refraction is the bending of light, as it passes from one medium to another with a different refractive index. Water has a higher refractive index than air, so sunlight is refracted as it enters a water droplet.
- Dispersion is the separation of white light into its component colors when it passes through a prism or other object with a varying refractive index. The different colors of light have different wavelengths, so they are refracted at different angles.
- Reflection is the bouncing back of light when it hits a surface. The light rays that are reflected from the inside of the water droplet are the ones that we see as a rainbow.
5. Consider the following statements regarding the FELUDA Test:
1. It uses FnCas9 protein and guide RNA to recognize viral
genes.
2. It simplifies testing and provides results faster than some other methods.
Which of the statements given above is/are correct?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
Answer: (C)
Explanation:
- FELUDA stands for FnCas9 Editor Linked Uniform Detection Assay. It is a CRISPR-based test for the detection of viral genes. The test uses a FnCas9 protein, which is a nuclease that can cut DNA at specific sequences. The FnCas9 protein is guided to the target viral gene by a guide RNA (gRNA). If the target gene is present in the sample, the FnCas9 protein will cut it. This cutting event can then be detected using a variety of methods, such as lateral flow assays or fluorescence detection. Hence, statement 1 is correct.
- The FELUDA test is a simple and rapid test that can be performed in a variety of settings, including point-of-care and resource-limited settings. It has been shown to be effective in detecting a variety of viruses, including SARS-CoV-2, the virus that causes COVID-19. Hence, statement 2 is correct.
