SCE FE Mechanical Practice Questions - Saudi Council of Engineers Fundamentals of Engineering (FE) - Mechanical Exam - SCE FE Mechanical Practice Questions - Saudi Council of Engineers Fundamentals of Engineering (FE)

Question 1

An ideal gas at 300 K and 200 kPa is compressed isothermally to 400 kPa in a piston-cylinder device. If the initial volume is 0.5 m³, what is the final volume?

0.25 m³ 0.375 m³ 0.667 m³ 1.0 m³

Correct Answer:

0.25 m³

Question 2

A Carnot heat engine operates between a source at 800 K and a sink at 300 K. What is the maximum theoretical thermal efficiency?

37.5% 62.5% 75.0% 87.5%

Correct Answer:

62.5%

Question 3

According to the first law of thermodynamics for a closed system undergoing a process, which expression is correct?

ΔU = Q − W (sign convention: heat in positive, work out positive) ΔU = Q + W for all thermodynamic sign conventions Q = W for any adiabatic process ΔU = 0 for any isothermal ideal gas process

Correct Answer:

ΔU = Q − W (sign convention: heat in positive, work out positive)

Question 4

Steam at 2 MPa with a quality x = 0.85 enters a turbine. Which property set must be consulted from steam tables to determine the specific enthalpy?

Saturated liquid and saturated vapor enthalpies at 2 MPa Superheated steam table at 2 MPa only Compressed liquid table regardless of quality Ideal gas relation h = cpT alone

Correct Answer:

Saturated liquid and saturated vapor enthalpies at 2 MPa

Question 5

Air in a rigid insulated tank (ΔQ = 0, ΔV = 0) is stirred by a paddle wheel adding 50 kJ of shaft work. If the internal energy increases by 50 kJ, the process is:

Isothermal Isobaric Isochoric adiabatic with work input Isentropic expansion

Correct Answer:

Isochoric adiabatic with work input

Question 1

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Prepare with the SCE FE Mechanical Practice Questions - Saudi Council of Engineers Fundamentals of Engineering (FE) - Mechanical Exam practice quiz. This question bank includes 100 questions covering heat, temperature, energy, approximately, and ratio. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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SCE FE Mechanical Practice Questions - Saudi Council of Engineers Fundamentals of Engineering (FE) - Mechanical Exam

This practice set contains 100 questions from the matching question bank and focuses on heat, temperature, energy, approximately, and ratio. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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SCE FE Mechanical Practice Questions - Saudi Council of Engineers Fundamentals of Engineering (FE) - Mechanical Exam

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