Nalco Interview Questions Answers, HR Interview Questions, Nalco Aptitude Test Questions, Nalco Campus Placements Exam Questions

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This page contains the most recently asked technical questions and answers in the Nalco.

All of the questions listed below were collected by students recently placed at Nalco.

Ques:- If the first day of the year 1991 was Tuesday. What day of the week must have been on 1st January, 1998?
A. Tuesday
B. Wednesday
C. Thursday
D. Friday
Recent Answer : Added by Niroshani Jayakody On 2022-09-02 17:03:14:

2 Leap years
+2 to tuedsay
Thursday is the correct answer

Ques:- Complete the following series.
9, 11, 15, 23, 39, ?
A. 42
B. 56
C. 64
D. 71
Recent Answer : Added by Aakash P S On 2022-08-24 17:03:41:


Ques:- What is the number of zeros of the product of the first 100 numbers ?
Recent Answer : Added by Admin On 2020-05-17 12:05:49:

exp: 0 is formed by multiplying 5 with 2. so first we find
how many 5’s and 2’s are there in 100!.
No of 5’s : 100/5=20/5=4/5.
20 +4 =24.
No of 2’s : 100/2=50/2=25/2=12/2=6/2=3/2=1/2.
50 +25 +12 +6 +3 +1.
It has 24 5’s and 2’s.
so the no. of zeros=24.

Ques:- A+B+C+D=D+E+F+G=G+H+I=17 where each letter represent a number from 1 to 9. Find out what does letter D and G represent if letter A=4. give the steps
Recent Answer : Added by Admin On 2020-05-17 12:04:27:

a=4, b=6,c=2,d=5,e=8,f=3,g=1,h=9,i=7

Ques:- When I was married 10 years ago my wife is the 6th member of the family. Today my father died and a baby born to me. The average age of my family during my marriage is same as today. What is the age of Father when he died?
Recent Answer : Added by Admin On 2020-05-17 12:02:07:

let x be the avg age of each person in the family ten years
so total age=6x
after 10 years i.e,now the total age of the family =6x+60
let grand father age as y
then the average of the family=(6x+60-y)/5
(bcoz grand father has expired and the new born baby has no
age at present)
according to the given question (6x+60-y)/5=x
bcoz x is the avg age bfore 10 years.
while calc the equation according to the presnt age we have
to add 10 to the result….
so the answer is 70

Ques:- Number Series 10,2,8,2,6,2,?
Recent Answer : Added by Nagarjuna On 2021-04-22 15:45:02:


Ques:- 15 lts of water containing 20% alcohol, then added 5 lts of water. What is % alcohol.
Recent Answer : Added by Admin On 2020-05-17 11:59:34:

15 litre water contains 20% alcohal ie. 12 (water)+ 3
after adding 5 liter water it becomes 12+5=17 (water)& 3
ie. 17:3 and answer will be 85:15. ie. 15%.

Ques:- Information regarding family members
Ques:- A ship started from port and moving with I miles per hour and another ship started from L and moving with H miles per hour. At which place these two ships meet?
Ques:- There are 7 letters A,B,C,D,E,F,GAll are assigned some numbers from 1,2 to 7.B is in the middle if arranged as per the numbers.A is greater than G same as F is less than C.G comes earlier than E.1) Which is the fourth letter ? ( B / D / F/ E)2) what is the difference between A and F? ( 3 /4/ 5/ 6)3 Choose 4 consecutive letters? ( ABCD / BDFE / AEFB / NONE OF THESE )
Ques:- Any Recent Movie you Saw Tell Me Story in Short ?
Ques:- Current Experience in the functional area
Ques:- The router is a secondary server do you agree with this point?
Ques:- Evaluate the area of square field whose side of length is 15 m?
Recent Answer : Added by Sheeba On 2022-08-14 16:42:04:


Ques:- What is the average of first five prime numbers greater than 20 ?
Ques:- A train 110 meters long is running with a speed of 60 kmph. In what time will it pass a man who is running at 6 kmph in the direction opposite to that in which the train is going?
Ques:- The ratio of the present ages of P and Q is 3:4. 5 years ago, the ratio of their ages was 5:7. Find the their present ages?
Recent Answer : Added by Madhu moger On 2022-09-15 16:36:43:


Ques:- P, Q, R, S, T and U are six cities which are in a row in the same order. A bus, b1 travels from P to U and another bus b2 travel from U to P. The bus b1 reaches S at 10:40 and bus b2 reaches Q at 10:35 if the travel time between any two adjacent cities is 40 minutes and the stoppage time at each city is 15 minutes. Which city do the two buses meet?
Recent Answer : Added by DK BOSS On 2021-07-17 06:28:10:

Answer: 8:10, 7:10


The bus b1, which started at P, reached S at 10:40, passing through the intermediary cities Q and R.

The time taken to travel from P to S
= 3 * 40 + 2 * 15 = 150minute
(journey)+(stoppage) = 2 hrs 30 minutes.
Hence, b1 started at 10:40 – 2:30 = 8:10 at P.
b2 reached Q, starting at U, through the city T, S and R.
The time taken by it to reach S = 4 * 40 + 3 * 15 = 205 minutes = 3 hr 25 minutes.
Hence, b2 started at, 10:35 – 3:25 = 7:10, at U.

Ques:- If a man can cover 12 metres in one second, how many kilometres can he cover in 3 hours 45 minutes?
Recent Answer : Added by Sohini Mitra On 2022-09-02 17:02:39:

3hour 45 min = 13500 sec
In 1 sec he covers = 12 m
In 13500 sec he covers = 12×13500 m = (12×13500)/1000 km = 162 km

Ans : 162 km

Ques:- If JOSEPH is coded as FKOALD, then GEORGE will be coded as
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