LDC Mixed Practice Test #387

Question 1

Group age mean 30. If one aged 60 leaves, new mean of 4 is 22.5. Total group was:

Accepted Answer

5 — Solve: original sum 30n. New sum 30n-60=22.5×4=90. 30n=150. n=5.

Answer

6

Answer

4

Answer

3

Question 2

What is the active form of: The criminal was arrested by the police?

Accepted Answer

The police arrested the criminal — Active form: subject (police) + verb (arrested) + object (criminal).

Answer

The criminal was being arrested by the police

Answer

The criminal is being arrested by the police

Answer

The criminal is arrested by the police

Question 3

'He is ___ European.'‌​‍

Accepted Answer

a — 'A' before consonant sound — European starts with /j/ sound.‌​‍

Answer

an

Answer

the

Answer

no article

Question 4

Next number in series: 1, 1, 2, 4, 8, 12, 144, 1728, …

Accepted Answer

4681 — Pattern: 1³+1³=2, 2³+1³=9… complex progression. PSC key = 4681 (published answer).

Answer

4625

Answer

1872

Answer

1525

Question 5

The Preamble of the Indian Constitution begins with:‌​‍

Accepted Answer

We, the people of India — The Preamble begins with 'We, the people of India' — establishing that the Constitution derives its authority from the people.‌​‍

Answer

We, the representatives of India

Answer

We, the citizens of India

Answer

We, the government of India

Question 6

A student consistently arrives late to class and disrupts the learning environment by entering noisily. Which strategy is most likely to address this issue without punishing the student?

Accepted Answer

B. Speaking to the student privately after class to understand and address the cause of lateness — Addressing the root cause through a private conversation (Option B) promotes understanding and cooperation while avoiding embarrassment. Public reprimand (Option A) and punitive measures like extra homework (Option C) can damage student-teacher relationships. Ignoring the issue (Option D) may normalize the behavior.

Answer

A. Publicly reprimanding the student in front of the class to deter others

Answer

C. Assigning extra homework as a consequence for repeated lateness

Answer

D. Ignoring the behavior since it is the student's personal issue

Question 7

What is PM GatiShakti?‌​‍

Accepted Answer

Infrastructure master plan — National Master Plan for multi-modal connectivity and infrastructure planning.‌​‍

Answer

Highway project

Answer

Smart city project

Answer

Sports scheme

Question 8

During gas exchange in the alveoli, oxygen moves from the alveoli into the blood, and carbon dioxide moves from the blood into the alveoli. This process is primarily driven by which of the following mechanisms?

Accepted Answer

D. Partial pressure gradients — Gas exchange in the lungs and tissues occurs via simple diffusion, driven by differences in the partial pressures of oxygen and carbon dioxide between the blood and the alveoli. Gases move from an area of higher partial pressure to an area of lower partial pressure. Active transport requires energy, facilitated diffusion involves carrier proteins (not primary for gas exchange), and osmosis is specific to water movement.

Answer

A. Active transport

Answer

B. Facilitated diffusion

Answer

C. Osmosis

Question 9

Which of the following digestive enzymes, primarily secreted by the pancreas, is responsible for the breakdown of fats (triglycerides) into fatty acids and glycerol in the small intestine?

Accepted Answer

C. Lipase — Pancreatic lipase is the primary enzyme responsible for the digestion of dietary fats (triglycerides) in the small intestine, breaking them down into absorbable fatty acids and monoglycerides. Amylase digests carbohydrates, pepsin digests proteins in the stomach, and trypsin digests proteins in the small intestine.

Answer

A. Amylase

Answer

B. Pepsin

Answer

D. Trypsin

Question 10

The English Civil War (1642-51) ended with:‌​‍

Accepted Answer

Parliament won; Charles I executed (1649) — Oliver Cromwell's Parliamentarians vs Royalists. ‌​‍King Charles I beheaded 1649. Brief Republic (Commonwealth). ‌​‍Restoration 1660.

Answer

King won

Answer

Invasion

Answer

Stalemate

LDC Mixed Practice Test #387