Bihar Police Constable Mock Test - 7 - Bihar Police Constable MCQ

Through O, draw a line l parallel to both AB and CD. Then
∠1 = 45° (alt. ∠S)
and ∠2 = 30° (alt. ∠S)
∴ ∠BOC = ∠1 + ∠2 = 45° + 30° = 75°
So, X = 360° – ∠BOC = 360° – 75° = 285°
Hence X = 285°.

The National Medical Commission (NMC) is all set to launch its “one nation, one registration platform” for doctors across India. The NMC will unveil a patch pilot of the National Medical Register (NMR) in the next six months, where doctors will be allotted a unique identification number.

∠DAC = ∠B + ∠C
(Exterior angle prop. of a Δ ABC)
According to question,
130° = 2A + 3A
5A = 130°
A = 26°
∴ ∠B = 52°; ∠C = 78°

12 + 19 + 23 + 7 + x + 9 + 26 + 13 = 16 × 8
109 + x = 128
x = 128 – 109 = 19
Hence, Option D is correct.

While the Congress was ready to cooperate with the League for the independence of the Indian Union, the League did not care for the independence of the Union. It was only interesting in a separate nation. Hindu leaders led by Vir Savarkar condemned the CR Plan

We know that: 
LCM is the least common multiple of the given numbers whereas HCF is the highest common factor of those numbers.
Then, LCM is the multiplication of one common factor of the numbers and the other different factors of the numbers.
Write the LCM = 120 into factored form, that is
120 = 2 × 2 × 2 × 3 × 5
= 4(2 × 3 × 5)
⇒ 4 is the common factor of the numbers.
So, the HCF of three numbers is a multiple of 4.
Multiples of 4: 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, ...
Therefore, 35 is not the multiple of 4, then 35 cannot be their HCF.

• World Book and Copyright Day is observed every year on April 23 to promote the habit of reading, writing, publishing and copyright.
• The first World Book Day was observed in 1995. International Decade of Indigenous Languages will be observed from 2022 to 32. The UNESCO theme of the World Book Day 2023 is ‘Indigenous Languages’.

The dialysing fluid removes waste products from the blood by diffusion in artificial kidneys.

• Nettle is an herbaceous plant that grows in the wild.
• Nettle leaves have stinging hair, which causes painful stings when touched accidentally. 
• This is due to the methanoic acid secreted by them. 
• A traditional remedy is rubbing the area with the leaf of the dock plant, which often grows beside the nettle.

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

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.

Female foeticide refers to the practice of killing a female child inside the womb. This unethical practice is a form of gender-based violence that results in a skewed sex ratio and perpetuates discrimination against females even before birth.

Diagonal of a room = √(l² + b² + h²)
So the answer = √(20² + 10² + 20²) = √900 = 30 meters
Hence, Option B is correct.

i) Rohit walked 30m towards South.
ii) Took a left turn and walked 50m
iii) Again he took a left turn and walked 30m.
Drawing the Diagram as per the given information:

AB = CD = 50m
Thus we can see he is 50m far from the starting point.
Hence, the correct answer is "50m".

Let the number be x.
According to the question,

The distance covered in the various phases of his travel would be:
10 km + 25 km + 50 km + 60 km. Thus the total distance covered = 145 km in 2 hours 50 minutes
Æ
145 km in 2.8333 hours Æ 51.18 kmph

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.

• दिए गए विकल्पों में से वाक्य 'पुलिस के आने से पहले ही चोर भाग चुके थे।' पूर्ण भूतकाल का उदाहरण है। 
• क्रिया के उस रूप को पूर्ण भूतकाल कहते हैं, जिससे क्रिया की समाप्ति के समय का स्पष्ट बोध होता है कि क्रिया को समाप्त हुए काफी समय बीता है।

Among the given options:

• Mathura, Allahabad, and Varanasi are all known as important religious cities in India, especially for Hindus.
• Kanpur is mainly recognised as an industrial city and is not famous for religious significance like the others.

So, Kanpur is the word that is different from the rest.

 

The Bihar government has announced a 10% reservation quota for people falling under the Economically Weaker Section (EWS) category in the state's judicial services, as well as in government-run law colleges and universities.

Inertia
Inertia is a fundamental concept in physics that describes an object's resistance to changes in its motion. It is directly related to the mass of an object and plays a crucial role in understanding the behavior of objects in motion.
Key Points:
- Sets objects in motion: Inertia is not responsible for setting objects in motion. It is the property of an object to resist changes in its state of motion. Once an external force is applied to an object, it overcomes its inertia and sets the object in motion.
- Causes changes in motion: Inertia is the reason why objects continue to move in a straight line at a constant speed in the absence of any external forces. However, if an external force is applied, the object's inertia resists the change, causing the object to accelerate, decelerate, or change direction.
- Is the result of a net force: Inertia is not directly the result of a net force. It is a property of matter and exists regardless of the presence or absence of external forces. However, when a net force acts on an object, it can overcome the object's inertia.
- Is directly proportional to the mass of an object: Inertia is directly related to the mass of an object. The greater the mass, the greater the inertia. This means that objects with larger masses are more resistant to changes in their motion compared to objects with smaller masses.
Therefore, the correct answer is option D: "is directly proportional to the mass of an object."

Suppose required number is x Then,

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.

Volume of the cylinder = πr²h

Hence, Option B is correct.

Gandhi started the fast in February 1943. On March 23, 1943, Pakistan day was observed. C Rajagopalachari formula was prepared in 1944.

Let the widh = 2x
Length = 3x
2x × 3x = 54
x = 3 cm
Hence, Option A is correct.

The ratio of 1 hour to 300 seconds is:

• To compare time, we should convert both times to the same unit. Let's convert 1 hour to seconds (since 1 hour = 3600 seconds).
• 1 hour = 1 × 3600 seconds = 3600 seconds
• Now we have 3600 seconds to 300 seconds. The ratio is  3600 : 300.
• To simplify, divide both by their greatest common divisor, which is 300.
• 
• So, the ratio is 12 : 1, which corresponds to option (b).

Primary air pollutant are

1) SO₂

2) CO & CO₂

3) NO, NO₂

4) Volatile organic compound

5) Suspended Particulate Matter (SPM)

6) Radioactive compound

7) Halogen compound

Secondary air pollutant are

1) Sulphuric acid (H₂SO₄)

2) Formaldehydes

3) Photochemical smog

4) Ozone

5) Peroxy Acetyl – nitrate (PAN)