Free Dangote Refinery Aptitude Test Past Questions and Answers

Free Dangote Refinery Aptitude Test Past Questions and Answers-PDF Download

Are you ready to take your career aspirations to new heights at the esteemed Dangote Refinery?A crucial step towards securing your dream role in one of the world’s premier refineries. Unlock the doors to success by arming yourself with our meticulously crafted Free Dangote Refinery Aptitude Test Past Questions and Answers package.

About Dangote Refinery

Dangote Group is one of the most diversified business conglomerates in Africa with a hard-earned reputation for excellent business practices and products’ quality with its operational headquarters in the bustling metropolis of Lagos, Nigeria in West Africa

The Significance of the Free Dangote Refinery Aptitude Test:

The aptitude test is a crucial stage in the Dangote Refinery recruitment process. It serves as an objective assessment of candidates’ abilities, aptitude, and potential to excel in their chosen roles. This test is designed to evaluate a range of skills, including problem-solving, critical thinking, numerical reasoning, verbal reasoning, and technical knowledge. Excelling in the aptitude test greatly enhances your chances of proceeding to the next stages of the selection process.

Types of Questions in the Free Dangote Refinery Aptitude Test:

CHEMICAL ENGINEERING

MECHANICAL ENGINEERING

PETROLEUM ENGINEERING

Preparing with Past Questions and Answers: Utilizing past questions and answers is an effective strategy for preparing for the Dangote Refinery aptitude test. Here’s how to make the most of this resource:

Familiarization: Solve a variety of past questions to become familiar with the types of questions that commonly appear in the test.
Time Management: Practice solving questions within the allocated time to improve your speed and accuracy.
Identify Weak Areas: Analyze your performance to identify areas where you need improvement. Focus on strengthening your skills in those areas.
Review Answers: After attempting the questions, review the provided answers and explanations to understand the correct approaches.
Practice Regularly: Consistent practice using past questions will boost your confidence and enhance your problem-solving abilities.
Simulate Test Conditions: Practice under conditions similar to the actual test, such as a quiet environment and time limits.

Sample Questions on Dangote Refinery Aptitude Test

CHEMICAL ENGINEERING
1. What is the energy balance of closed system?
a) Matter in the system is constant
b) Energy in the system is constant
c) Neither energy nor matter is constant
d) Both of energy and matter are constant
The correct answer is A.
Explanation:
For closed system energy balance, matter in the system is constant.

2. Which of the following is the humidity chart?
a) Psychrometric chart
b) Psychometric chart
c) Psychological chart
d) None of the mentioned
The correct answer is :A
Explanation:
Humidity chart is also called Psychrometric chart.

3. Humidity chart relates which of the following balances?
a) Momentum and energy balance
b) Material and energy balance
c) Material and momentum balance
d) None of the mentioned
The correct answer is :B
Explanation:
Humidity chart relates material and energy balance.

4. What are the number of degrees of freedom if the number of variables and number of equations are 10 and 8 respectively?
a) 2
b) 8
c) 10
d) 18
The correct answer is :A
Explanation:
Number of degrees of freedom = 10 – 8 = 2.

5. What are the number of degrees of freedom if the number of variables and number of equations are 15 and 10 respectively?
a) 5
b) 10
c) 15
d) 25
The correct answer is :A
Explanation:
Number of degrees of freedom = 15 – 10 = 5.

Mechanical engineering
1. One kg of diatomic Oxygen is present in a 500 L tank. Find the specific volume on both mass and mole basis.
a) 0.6 m3/kg , 0.260 m3/mole
b) 0.5 m3/kg , 0.0160 m3/mole
c) 0.56 m3/kg , 0.0215 m3/mole
d) 0.7 m3/kg , 0.0325 m3/mole
The correct answer is :B
Explanation:
The specific volume on mass basis= 0.5/1 = 0.5 m3/kg specific volume on mole basis= 0.5/(1/0.032) = 0.0160 m3/mole.

2. A piston/cylinder with a cross-sectional area of 0.01 m^2 is resting on the stops. With an outside pressure of 100 kPa, what should be the water pressure to lift the piston?
a) 178kPa
b) 188kPa
c) 198kPa
d) 208kPa
The correct answer is :C
Explanation:
Explanation: Pw = Po + mg/A = 100000 + (100*9.8/0.01) = 198kPa.

3. Equation of continuity comes from
a) conservation of energy
b) conservation of mass
c) conservation of work
d) conservation of heat
The correct answer is :B
Explanation:
w1=w2 i.e., we get (AV/v)1=(AV/v)2 and this is called equation of continuity(where w1 & w2 are mass flow rates.

4. In a flow process, the work transfer may be of which type?
a) external work
b) flow work
c) all of the mentioned
d) none of the mentioned
The correct answer is :C
Explanation:
Flow work is the displacement work and external work mostly comprises of shaft work.

5. The total rate of flow of all energy streams entering the control volume must equal to that of leaving the control volume.
a) true
b) false
The correct answer is :A
Explanation:
Given statement is true by the conservation of energy.

CHEMICAL / PETROLEUM ENGINEERING

1. What is the energy balance of closed system?
a) Matter in the system is constant
b) Energy in the system is constant
c) Neither energy nor matter is constant
d) Both of energy and matter are constant
The correct answer is :A
Explanation:
For closed system energy balance, matter in the system is constant.

3. Humidity chart relates which of the following balances?
a) Momentum and energy balance
b) Material and energy balance
c) Material and momentum balance
d) None of the mentioned
“The correct answer is :B
Explanation:
Humidity chart relates material and energy balance.