Delhi Police Head Constable Mock Test - 4 Free Online Test 2026

Punjab and West Bengal have challenged the central government’s decision to expand the Border Security Force’s (BSF) operational jurisdiction from 15 km to 50 km. They argue that this move violates federal principles and encroaches on state law and order powers. The BSF, established in 1965 after the India-Pakistan war, is a vital part of India’s security apparatus, operating under the Ministry of Home Affairs. It has over 2 lakhs personnel and is primarily deployed along the borders with Pakistan and Bangladesh, including the Indo-Pakistan International Border and Indo-Bangladesh International Border.

CONCEPT:

Galvanometer:

• A galvanometer is used for detecting current in an electric circuit.
• The galvanometer is the device used for detecting the presence of small currents and voltage or for measuring their magnitude.
• The galvanometer is mainly used in the bridges and potentiometer where they indicate the null deflection or zero current.
• The potentiometer is based on the premise that the current sustaining coil is kept between the magnetic field experiences a torque.

EXPLANATION:

• From the above, it is clear that the galvanometer is the instrument used for detecting the presence of electric current in a circuit. Therefore option 1^st is correct.

​Additional Information 

Mistake Point
Difference between Ammeter and Galvanometer:

• The ammeter shows only the magnitude of the current.
• The galvanometer shows both the direction and magnitude of the current.

The correct answer is the Election Commission of India.

• India has a multi-party system, where political parties are classified as National, state, or regional level parties.
• The status of the party is accorded by the Election Commission of India.

• Election Commission of India is a permanent Constitutional Body.
• The Election Commission was established in accordance with the Constitution on 25th January 1950.
• Originally the commission had only a Chief Election Commissioner. It currently consists of Chief Election Commissioner and two Election Commissioners.

• ​Constitutional Provision
  • Mentioned Under Part - XV.
  • Related Articles lies between 324 to329.
• The Constitution provides ECI, the power of superintendence, direction & control of elections to
  • Parliament
  • State legislature
  • The office of president of India
  • The Office of the vice-president of India

Mahindra & Mahindra has collaborated with Adani Total Energies to establish a nationwide EV charging infrastructure. This partnership aims to enhance e-mobility solutions and improve customer experience in line with climate action goals.

The correct answer is 8th.

Key Points

• India has moved two spots to 8th rank in the Climate Change Performance Index 2023 (CCPI).
• In 2022 & 2021, India stood at the 10th spot, while in 2020, it ranked 9th.
• Denmark & Sweden have topped the index.
• The CCPI evaluates 59 countries & the European Union, which together generate over 90% of global greenhouse gas emissions.
• CCPI first published: 2005
• Published by: Germanwatch

Additional Information

• ​Important Ranking and Index:
  • India ranked 41 out of 44 countries in the Mercer CFS Global Pension Index 2022.
  • India has moved up 6 places to rank 123 out of 161 countries for reducing inequality, according to the 2022 Commitment to Reducing Inequality Index (CRII).
  • India climbed six notches to 40th position in the Global Innovation Index 2022, according to a report by the Geneva-based World Intellectual Property Organization.
  • India with an index score of 0.663, stood at 4th in the 2022 Global Crypto Adoption Index.
  • India ranked 132 out of 191 countries in the 2021 human development index (HDI), according to a report released by the United Nations Development Programme (UNDP).
  • India ranks 135 among a total of 146 countries in the Global Gender Gap Index 2022.
  • Austrian capital Vienna has been ranked as the world's most liveable city in the report 'Global Liveability Index 2022'.
  • Vienna replaced New Zealand's Auckland city as the most liveable city.
  • Kerala has been ranked first in Asia in Affordable Talent in Global Startup Ecosystem Report (GSER) 2022.
  • India has jumped six positions to 37th rank on the annual World Competitiveness Index for the year 2022.
  • Denmark has been ranked at the top while Switzerland has been ranked at second position.

The Indian Air Force (IAF) is set to conduct ‘Gagan Shakti-2024’, the nation’s largest air military exercise, involving all Air Force stations. Held every five years, it will commence on April 1, 2024, at Pokhran’s field firing range. Approximately 10,000 airmen will participate, with maneuvers spanning the Western and Northern fronts. The Indian Army is aiding logistical support, ensuring synergy across sectors for operational rail mobilization.

Total income of the year = 5 × 21,000 + 4 × 24,000 + 3 × 12,000 + 1,80,000 = 4,17,000

Hence, Option B is correct.

If the car does half the journey @ 30 kmph and the other half at 40 kmph it’s average speed can be
estimated using weighted averages.
Since, the distance traveled in each part of the journey is equal, the ratio of time for which the car
would travel would be inverse to the ratio of speeds. Since, the speed ratio is 3:4, the time ratio
for the two halves of the journey would be 4:3. The average speed of the car would be:
(30 × 4 + 40 × 3)/7 = 240/7 kmph.
It is further known that the car traveled for 17.5 hours (which is also equal to 35/2 hours).
Thus, total distance = average speed × total time = (240 × 35)/(2 × 7) = 120 × 5 = 600 km

The length of the circular track would be equal to the circumference of the circle. In 2 minutes
thus, the cyclist covers 3.14 × 200 = 628 meters (using the formula for the circumference of a
circle).
Thus, the cyclist’s speed would be 628/2 = 314 meters/minute.

Step 1: Determine Sunny's Work Rate

• Sunny's Completion Time: 15 days to complete the work.
• Sunny's Work Rate:
  • Sunny can complete 1 work in 15 days.
  • Therefore, Sunny's work rate is 1/15 work per day.

Step 2: Calculate Bobby's Work Rate

• Bobby's Efficiency: Bobby is 60% as efficient as Sunny.
• Convert Efficiency to Fraction:
  • 60% = 60/100 = 3/5.
• Bobby's Work Rate:
  • Bobby's rate = (3/5) * (1/15) = 3/75 = 1/25 work per day.

Step 3: Determine the Number of Days Bobby Takes to Complete the Work

• Total Work: 1 work.
• Bobby's Daily Contribution: 1/25 work per day.
• Number of Days Required:
  • Days = Total Work / Bobby's Work Rate = 1 / (1/25) = 25 days.

Using Rule 1 :
1st number × 2nd number = L.C. M. × H.C.F,
Required number

d = -4, n = 7, a(n) = 4
a(n) = a + (n – 1) x d
a + (7 – 1) x (-4) = 4
a + 6 x (-4) = 4
a – 24 = 4
a = 4 + 24
a = 28

The logic followed is:

Given code: "MANIPUR is written as NBOJQVS" 

Similarly,

Thus "PATTERN will be written as "QBUUFSO".

Hence, the correct answer is "QBUUFSO". 

Preparing the family tree using the following symbol:

According to the given information,

Hence, Q is the grandmother of S.

As per the given information;

Distance between S and P = √(PQ² + QS²)
SP = √(6² + 8²)
SP = √(36 + 64)
SP = √100
SP = 10 km
Hence, S is 10 km in South-East with respect to P.

The logic follows here is:

Now,

Karan is 17 years old, has a weight of 47 kgs, and a height of 161 cms.

It is clearly mentioned in the criteria of Physical in Sub-inspector and Army recruitment about the weight and height of the candidate. Karan has a weight of 47 kgs and a height of 161 cms which is less than the criteria set for both the recruitment. Therefore, Karan neither qualifies for Physical in Sub-inspector and Army recruitment.

Hence, the correct answer is "Neither Sub-inspector nor Army recruitment".

Preparing the family tree using the following symbols:

On decoding L θ Z β T means L is the mother of Z and Z is the sister of T.

i) L is mother of T → True
ii) L is father of T → False (as L is mother of T) 
iii) T is father of L → False (as T is either son or daughter of L)
iv) Z is daughter of T → False (as Z is sister of T)
Hence, 'L is mother of T' is the correct answer.

A, B, C, D, E and F are sitting in a circle facing towards centre.

i) A is second to the left of D and second to the right of E.

ii) D is between F and B.

The final arrangement is:

Thus C is facing towards D.

Hence, the correct answer is "C".

Five persons A,B,C,D and E are sitting one above the other on a ladder (not necessarily in the same order).

1) B is sitting above A with one person between them.

2) Only two persons are sitting between A and C. If C is not sitting top, the figure are given below -

In which there is two case in which first one is -

Second case are given below -

After observation of both cases, B is the sitting in the middle.

Hence, "B" is the correct answer.

From Statement I:
M is shorter than only P. K is taller than L and N.
Case1: P > M > K > N > L
Case2: P > M > K > L > N
Here, we cannot determine who is the shortest, either L or N is the shortest person. Also, we don’t know the position of O here.
From Statement II:
We have, M is shorter than both P and L. K is shorter than P but taller than L. O is shorter than both K and M. P is not tallest.
N > P > K > L > M > O
Here, O is the shortest person.
Hence option B is correct.

One word substitute is Imposter.

Imposter: a person who pretends to be someone else in order to deceive others, especially for fraudulent gain.
Liar: a person who tells lies.
Rogue: a dishonest or unprincipled man.
Magician: a person with magical powers.

In the given sentence, ‘is being’ must be replaced with ‘has been’ to make the sentence grammatically correct. "Has been" is used in the third-person singular for the present perfect tense. The present perfect tense refers to an action that began at some time in the past and is still in progress. Hence, option (b) is correct.

The verb phrase after "were sometimes" should be in the -ing (present-participial/continuous) form to fit grammatically: e.g., "were sometimes barking...", "were sometimes crying...".

Option A: Barking up the wrong tree is in the -ing form and fits both grammatically and contextually; it means pursuing a mistaken or ineffective course of action.
Option B: Stirred up a hornet’s nest is not in the -ing form. "Were sometimes stirred up a hornet’s nest" is ungrammatical in this construction.
Option C: Upset someone’s applecart is also not in the required -ing form and so is grammatically unsuitable here.
Option D: Crying wolf is grammatically possible (has the -ing form) but contextually less appropriate because it means raising false alarms; the intended sense is that the scientists were sometimes pursuing mistaken lines of recommendation, which is best captured by option A.

Final answer: A

Cardinal means of the greatest importance; fundamental

Complacency would be India's cardinal sin

When used as verbs, admonish means to warn or notify of a fault, whereas reprimand means to reprove in a formal or official way. Reprimand is also noun with the meaning: a severe, formal or official reproof.

Tirade is a speech of criticism or denunciation, hence adoration is an antonym

As we can say that ,
Compassionate is someone who cares or is concerned about another person, unsympathetic is one who does not care or understand another’s condition or position. Indecisive means someone who cannot take decisions easily, unlawful is something against law, and Untrustworthy is someone who cannot be trusted.
From above it is clear that Unsympathetic is an opposite word of Compassionate . 

One word substitution is Dotage.

Imbecility: Stupid or insane behaviour.

Youth: The period between childhood and adult age.

Dotage: The period of life in which a person is old and weak, especially with some loss of mental ability.

Superannuation: Regular payment made into a fund by an employee towards a future pension.

The original sentence "It is time to take tea" implies that the action of taking tea should happen now or at this moment.

The correct option that expresses the same sense is:

D. It is time for tea to be taken.