Questions

Q:

Synchronous motor can operate at

A) Lagging power factor only B) Unity power factor only
C) Leading power factor only D) At any power factor
 
Answer & Explanation Answer: D) At any power factor

Explanation:

synchronous motor can operate at lag lead and unity power factor also why because it is mainly depends on excitation

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Q:

Acceptable noise level for human ear

A) > 85 db B) = 85 db
C) < 85 db D) None of the above
 
Answer & Explanation Answer: C) < 85 db

Explanation:

Sound intensity or level is measured by a unit called a decibel. An 85 decibel noise level is not a safe standard for the public.

 

Hence, Acceptable noise level for human ear is less than 85 db.

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Q:

A homogeneous mixture is also called

A) Compound B) Pure substance
C) Solution D) None of the above
 
Answer & Explanation Answer: C) Solution

Explanation:

A homogeneous mixture is also called as solution.

The term "solution" is more frequently used when a homogeneous mixture is a liquid, although it is sometimes used if the homogeneous mixture is a gas.

 

Another name for a solid homogeneous mixture of metals is an alloy.

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Q:

Write a c program for insertion sort.

Answer

#include<stdio.h>
int main(){

  int i,j,s,temp,a[20];

  printf("Enter total elements: ");
  scanf("%d",&s);

  printf("Enter %d elements: ",s);
  for(i=0;i<s;i++)
      scanf("%d",&a[i]);

  for(i=1;i<s;i++){
      temp=a[i];
      j=i-1;
      while((temp<a[j])&&(j>=0)){
      a[j+1]=a[j];
          j=j-1;
      }
      a[j+1]=temp;
  }

  printf("After sorting: ");
  for(i=0;i<s;i++)
      printf(" %d",a[i]);

  return 0;
}

Output:
Enter total elements: 5
Enter 5 elements: 3 7 9 0 2
After sorting:  0 2 3 7 9

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Q:

A starts a business, after 6 months B also join him with Rs.4500 and after 2 months of B’s joining C also join them with Rs.4500. If A gets approx. Rs 4900 out of total annual profit of Rs. 10,000 then find the approximate value of initial investment of A.

A) Rs.4800 B) Rs.4200
C) Rs.3600 D) Rs.4400
 
Answer & Explanation Answer: C) Rs.3600

Explanation:

Let initial investment of A = x
Ratio of profit A : B : C = 12 × x : 6×4500 :4×4500
A :B:C = x : 2250: 1500
Now ATQx/(x+2250+1500) = 4900/10000
solving this we get,x ≈ Rs 3600

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Q:

Which country has been ranked number one in pollution related deaths ?

A) Australia B) Indonesia
C) India D) Japan
 
Answer & Explanation Answer: C) India

Explanation:
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Q:

Name the company that has recently created the world’s smallest magnet using a single atom which can store one bit of data on it.

A) TCS B) Microsoft
C) IBM D) Infosys
 
Answer & Explanation Answer: C) IBM

Explanation:

A team of researchers at IBM has created the world’s smallest magnet using a single atom which can store one bit of data on it.

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Q:

Which of the following are involved directly in pulmonary circulation?

A) left ventricle, aorta, and inferior vena cava B) right atrium, aorta, and left ventricle
C) superior vena cava, right atrium, and left ventricle D) right ventricle, pulmonary artery, and left atrium
 
Answer & Explanation Answer: D) right ventricle, pulmonary artery, and left atrium

Explanation:

Right ventricle (which pumps blood to the lungs), pulmonary artery (which carries blood to the lungs), and left atrium (which receives blood from the lungs) are involved directly in pulmonary circulation.

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