Description

Dangote Refinery past questions and answers study pack

This study pack comprise of Updated Dangote refinery past questions and answers, including extensive practice questions to put you in top shape for higher score at the test.

To perform well in this test, you must score higher than most candidates to pool among the selected candidates for the interview stages and eventual employment offer.

About Dangote Refinery Test.

Dangote refinery test usually comprise of 2 sections and it is typically GATE standard.

SECTION 1: General Aptitude test (100 questions)
SECTION 2: Technical / Course specific test (120 questions – answer any 100)

Sample Dangote Refinery Aptitude Test Past Questions and answers

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 :AExplanation:
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 :BExplanation:
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 :CExplanation:
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 :BExplanation:
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 :CExplanation:
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 :AExplanation:
Given statement is true by the conservation of energy.

CHEMICAL / PETROLEUM ENGINEERING

The correct answer is :AExplanation:
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 :AExplanation:
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 :BExplanation:
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 :AExplanation:
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 :AExplanation:
Number of degrees of freedom = 15 – 10 = 5.

How the test is scored:

The exam is highly competitive and there is no specific cut off marks. Selection is based on the general performance of all candidates in the test.

Each question carries 1/2 point. Unlike most job aptitude tests, more emphasis is on accuracy as there is no particular score for speed.

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Disclaimer

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Additional information

Technical Test Option	Chemical & Petroleum Engr, Civil Engineering, Electrical Engineering, Instrumentation, Management, Mechanical Engineering

2 reviews for Dangote Refinery past questions and answers study pack- PDF Download 2022

Rated 3 out of 5

Onwuka Charles – November 27, 2019

I am invited for a dangote aptitude test
Rated 5 out of 5

Blessing – January 23, 2020

Very useful book, quick delivery too. Welldone