Tanzania ERB Mechanical Practice Questions - Tanzania ERB Professional Engineers Examination - Mechanical Engineering Exam - Tanzania ERB Mechanical Practice Questions - Tanzania ERB Professional Engineers Examination

Question 1

Which of the following statements correctly defines a closed thermodynamic system?

A system that allows both energy and mass transfer across its boundaries. A system that allows mass transfer but not energy transfer across its boundaries. A system that allows neither energy nor mass transfer across its boundaries. A system that allows energy transfer but not mass transfer across its boundaries.

Correct Answer:

A system that allows energy transfer but not mass transfer across its boundaries.

Question 2

A heat engine operates between a high-temperature reservoir at 800 K and a low-temperature reservoir at 300 K. What is the maximum possible thermal efficiency of this engine?

75% 50% 37.5% 62.5%

Correct Answer:

62.5%

Question 3

Heat transfer through a solid material by molecular vibration and collision without any net movement of the material itself is known as:

Convection Advection Radiation Conduction

Correct Answer:

Conduction

Question 4

Steam enters a turbine at 5 MPa, 400 °C, and leaves at 10 kPa as saturated vapor. If the turbine produces 2 MW of power, and heat loss from the turbine is negligible, what is the mass flow rate of the steam? (Assume h1 = 3195.7 kJ/kg, h2 = 2583.9 kJ/kg for inlet and outlet respectively).

0.33 kg/s 3.26 kg/s 2.89 kg/s 1.95 kg/s

Correct Answer:

3.26 kg/s

Question 5

An adiabatic steam turbine operates with an inlet state of 4 MPa, 500 °C (h1 = 3446 kJ/kg, s1 = 7.090 kJ/kg·K) and an outlet pressure of 10 kPa. If the actual specific work output is 850 kJ/kg, what is the isentropic efficiency of the turbine? (At 10 kPa, h_f = 191.8 kJ/kg, h_fg = 2392.1 kJ/kg, s_f = 0.649 kJ/kg·K, s_fg = 7.501 kJ/kg·K).

70.8% 81.3% 75.0% 65.2%

Correct Answer:

70.8%

Question 1

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About this Exam

Prepare with the Tanzania ERB Mechanical Practice Questions - Tanzania ERB Professional Engineers Examination - Mechanical Engineering Exam practice quiz. This question bank includes 100 questions covering heat, water, pipe, flow, and turbine. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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Tanzania ERB Mechanical Practice Questions - Tanzania ERB Professional Engineers Examination - Mechanical Engineering Exam

This practice set contains 100 questions from the matching question bank and focuses on heat, water, pipe, flow, and turbine. 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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Tanzania ERB Mechanical Practice Questions - Tanzania ERB Professional Engineers Examination - Mechanical Engineering Exam

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