NABTEB Marine Engineering Craft Practical Questions 2022 Latest Update
– NABTEB Marine Engineering Craft Practical Questions –
NABTEB Marine Engineering Craft Practical NABTEB Expo Questions is out now on our website. In this article, I will show you past random repeated questions for free. All you need to do is to stay focused and follow this guide.
About NABTEB
The National Business and Technical Examinations Board was founded in 1992 to domesticate craft level examinations previously conducted by City & Guilds, Pittman’s, and the Royal Society of Arts throughout the United Kingdom in conformity with the principles of the National Policy on Education.
Its formation was the culmination of a 15-year evolutionary process in which FOUR Government Panels were established at various periods to assess the place and structure of public examinations in our educational system.
Mission
Develop as a globally recognised assessment body for artisans and technicians.
Vision
NABTEB is a vision-led, mission-driven public institution with the following vision: To be a Globally Recognised Assessment and Certification Body Preparing Candidates for the Workplace and Academic/Professional Excellence.
The management of the National Business and Technical Examinations Board (NABTEB) is yet to release the 2022 November/December NBC/NTC and ANBC/ANTC examinations results.
Candidates who intend to take part in the 2022 NABTEB GCE can learn how to check their results online.
NABTEB is one of the examination bodies set up by the Federal Government in 1992 to reduce the burden of conducting examinations, which involves a lot of technical and trade-related practicals.
The board conducts the National Technical Examination (NTC), National Business Certificate (NBC) and their respective advance level examinations (ANBC and ANTC).
READ ALSO!!!
➢ NABTEB GCE Guide Nov/Dec 2022
➢ NABTEB GCE Registration Form
➢ NABTEB Portal www.nabteb.gov.ng/
NABTEB Marine Engineering Craft Practical Questions and Answers
Question 1
1. Which standards govern the specifications for supply of Residual Marine Fuels and
Distillate Marine Fuels onboard merchant ships?
A. ISO 3012:1999
B. ISO 3648:1996
C. ISO 8216-1:2010
D. ISO 8217:2010
Answer-D
Question 2
2. Crank web deflection readings will give a positive indication of
A. worn main bearing journals
B. torsional stress deformation
C. slack thrust bearings
D. bearing shells, shim dimensions,
Answer-A
Question 3
3. The advantage of tie rods over an engine without tie rods is that:
A. The engine is easily aligned after any misalignment has taken place between different components of the engine
B. The engine does not require thrust pads for transmission of thrust to the ship’s hull as the same is being taken care of by the tie rods
C. The engine components are much lighter, leading to an overall reduction in engine weight with a high power generation with the elimination of fatigue stresses
D. There are no advantages of engines with tie rods because tie rods require regular maintenance and replacement like connecting rods and the overall engine becomes more expensive to operate
Answer-A
Question 4
4. The purpose of an air cooler in a supercharging system is to:
A. Reduce the temperature of supercharged air in order to condense and remove maximum possible moisture from the air prior to entry to the engine.
B. Reduce the temperature of the supercharged air in order to increase the density & also to cool down below dew point to remove moisture from the air prior to entry to the engine.
C. Cool supercharged air to increase its density such that the dew point is not reached to avoid entry of moisture into the engine.
D. Cool supercharged air to increase its density and also to keep the peak temperature and exhaust gas temperature within limits.
Answer-B
Question 5
5. Which of the following is an example of a solid bearing?
A. Piston pin bushing
B. Turbo-generator turbine bearing
C. Spring bearing
D. Thrust bearing
Answer-A
Question 6
6. In comparison to exhaust valves, intake valves of diesel engines may be fabricated from
low-alloy steels because
A. the bevelled edges of the intake valves provide for self-centring during seating
B. intake valves utilize stellite-coated valve seat inserts which reduce wear
C. the volume of air passing through intake valves is less than the volume of air passing through exhaust valves
D. intake valves are less affected by the corrosive action of exhaust gases
Answer-D
Question 7
7. Why is it essential to renew turbocharger bearings after a preset number of hours of
running even if the bearings are in perfect condition?
A. Because they are prone to failure because of prolonged exposure to high-temperature conditions.
B. Because they are subject to cyclic loading and are prone to failure because of metal fatigue.
C. It is not essential to renew if condition monitoring suggests perfect condition.
D. Lube oil contamination is bound to occur and affect the condition of the bearings.
Answer-B
Question 8
8. Modern marine turbochargers use a ___________ type of compressor
A. Radial flow
B. Axial flow
C. Mixed flow
D. Turbulent flow
Answer-A
Question 9
9. Which of the following is a disadvantage of water as a cooling medium for pistons, when
compared to oil?
A. Chemical treatment is required
B. Higher thermal stresses in piston
C. Piston of more complicated design
D. All the above
Answer-D
Question 10
10. In a 2-stroke marine diesel engine, if the o-ring for jacket cooling water sealing is
leaking then
A. The water will leak directly into the crankcase
B. The water will leak into the under piston space
C. The water will come out through a telltale hole provided between the two o-rings
D. The water will come out from the top of the cylinder jacket
Answer-C
DISCLAIMER! These are not real NABTEB Marine Engineering Craft Practical Questions, but likely repeated questions over the years to help candidates understand the nature of their examinations. Ensure to note every question provided on this page.
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