DCOA Mixed Practice Test #426

Question 1

The audible frequency range for humans is approximately:‌​‍

Accepted Answer

20 Hz – 20,000 Hz — Below 20 Hz is infrasound; above 20 kHz is ultrasound.‌​‍

Answer

1–100 Hz

Answer

Above 20,000 Hz

Answer

100 kHz – 1 MHz

Question 2

Name the newly appointed chairman of ISRO (Apr 2016):‌​‍

Accepted Answer

Dr. A.S. Kiran Kumar — Dr. A.S. Kiran Kumar was ISRO Chairman from January 2015 to January 2018.‌​‍

Answer

Sankar Aggarwal

Answer

G. Madhavan Nair

Answer

M.T. Thambidurai

Question 3

Kerala's unique physiography significantly influences its river systems. Which of the following geographical features is the primary reason for the short length, high velocity, and predominantly west-flowing nature of most rivers in the state?

Accepted Answer

B. The steep gradient of the Western Ghats on its western face, close to the Arabian Sea. — The Western Ghats rise abruptly and very close to the Arabian Sea on Kerala's western side. This steep and short slope causes rivers originating in the Ghats to flow rapidly over a short distance directly into the sea, thus making them short, swift, and predominantly west-flowing. While rainfall contributes to water volume and forests/soil influence runoff, the fundamental short and swift nature is due to the steep physiographic drop.

Answer

A. The extensive network of backwaters and estuaries along the coastal plains.

Answer

C. The high annual rainfall concentrated during the southwest monsoon season.

Answer

D. The prevalence of laterite soil and dense tropical evergreen forests in the midlands.

Question 4

Which of these is an irrational number?

Accepted Answer

√2 — √2 is irrational (non-terminating non-repeating decimal). √9=3, √16=4, √25=5 are rational.

Answer

√9

Answer

√16

Answer

√25

Question 5

A small farmer in Kerala owns 1.5 hectares of cultivable land. He is also a retired government employee receiving a pension of ₹12,000 per month. Can he avail benefits under the Pradhan Mantri Kisan Samman Nidhi (PM-KISAN) scheme?

Accepted Answer

B. No, because he is a retired government employee receiving a pension. — The PM-KISAN scheme has specific exclusion criteria. Individuals who are retired government employees receiving a pension of ₹10,000 or more per month are not eligible for benefits, irrespective of their landholding. The scheme aims to provide income support to small and marginal farmer families, but with these exclusions to target genuinely needy farmers.

Answer

A. Yes, because he owns cultivable land and is a small farmer.

Answer

C. Yes, but only if his landholding is less than 1 hectare.

Answer

D. No, because the scheme is only for landless farmers.

Question 6

The longest wall in the world is:‌​‍

Accepted Answer

Great Wall of China — Great Wall of China (~21,196 km). ‌​‍Built over centuries to protect against invasions.

Answer

Berlin Wall

Answer

Hadrian's Wall

Answer

Western Wall

Question 7

A teacher notices that a student consistently completes assignments only to earn stickers and praise, but shows little interest when the rewards are removed. This scenario best illustrates the influence of which type of motivation on learning?

Accepted Answer

B. Extrinsic motivation — The student's behavior is driven by external rewards (stickers and praise), which is characteristic of extrinsic motivation. Intrinsic motivation would involve internal satisfaction from the task itself. Self-determination theory relates to autonomy but doesn't directly explain reliance on rewards.

Answer

A. Intrinsic motivation

Answer

C. Self-determination theory

Answer

D. Maslow's deficiency needs

Question 8

Capital of Turkey:‌​‍

Accepted Answer

Ankara — Ankara.‌​‍

Answer

Izmir

Answer

Istanbul

Answer

Antalya

Question 9

Magnetic field inside a long solenoid:‌​‍

Accepted Answer

B = μ₀nI (uniform, along axis) — n = turns per unit length. ‌​‍Outside long solenoid B ≈ 0. Basis for electromagnets.

Answer

Depends on r

Answer

Zero

Answer

Increases outward

Question 10

A private unaided school in Kerala receives an application for admission to Grade 1 from a child belonging to an economically weaker section. According to the Right to Education (RTE) Act, 2009, what is the school's obligation towards this child's admission?

Accepted Answer

B. The school is obligated to admit the child and provide free and compulsory education, reserving at least 25% of the seats for such children. — The RTE Act, 2009, mandates that all private unaided schools reserve at least 25% of their entry-level seats for children from economically weaker sections and disadvantaged groups, providing them with free and compulsory education. Option A is incorrect as the reservation is a primary obligation, not contingent on general admissions. Option C is wrong because the education must be free. Option D is incorrect as the Act explicitly applies to private unaided schools for this provision.

Answer

A. The school must admit the child only if it has vacant seats after admitting all general category students.

Answer

C. The school can admit the child but is not required to provide free education as it is a private unaided institution.

Answer

D. The RTE Act does not apply to private unaided schools, so they are not obligated to admit children from disadvantaged groups.

DCOA Mixed Practice Test #426