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Engineering Thermodynamics MCQs

This document contains 10 multiple choice questions about thermodynamic cycles including the Rankine cycle and refrigeration cycle. The questions cover topics such as the effects of changing parameters like condenser pressure or adding reheating on cycle efficiency and output. They also test understanding of processes depicted on psychrometric charts and the components and heat transfer steps of vapor compression refrigeration and Rankine cycles.

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مريم أحمد بهاء الدين
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279 views1 page

Engineering Thermodynamics MCQs

This document contains 10 multiple choice questions about thermodynamic cycles including the Rankine cycle and refrigeration cycle. The questions cover topics such as the effects of changing parameters like condenser pressure or adding reheating on cycle efficiency and output. They also test understanding of processes depicted on psychrometric charts and the components and heat transfer steps of vapor compression refrigeration and Rankine cycles.

Uploaded by

مريم أحمد بهاء الدين
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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MCQ Revision Questions

(1) In a simple ideal Rankine cycle. If the (2) In a simple ideal Rankine cycle with fixed boiler
condenser pressure is lowered while keeping and condenser pressures. If the steam is
turbine inlet state the same, superheated to a higher temperature,
(a) the turbine work output will decrease. (a) the turbine work output will decrease.
(b) the amount of heat rejected will decrease. (b) the amount of heat rejected will decrease.
(c) the cycle efficiency will decrease. (c) the cycle efficiency will decrease.
(d) the moisture content at turbine exit will (d) the moisture content at turbine exit will
decrease. decrease.
(e) the pump work input will decrease. (e) the amount of heat input will decrease.

(3) In a simple ideal Rankine cycle with fixed (4) On the psychrometric chart, a cooling and
boiler and condenser pressures. If the cycle is dehumidification process appears as a line that is
modified with reheating, (a) horizontal to the left
(a) the turbine work output will decrease. (b) vertical downward
(b) the amount of heat rejected will decrease. (c) diagonal upwards to the right (NE direction)
(c) the pump work input will decrease. (d) diagonal upwards to the left (NW direction)
(d) the moisture content at turbine exit will (e) diagonal downwards to the left (SW direction)
decrease.
(e) the amount of heat input will decrease.
(5) On the psychrometric chart, a heating and (6) On the psychrometric chart, a heating process
humidification process appears as a line that is appears as a line that is
(a) horizontal to the right (a) horizontal to the right
(b) vertical upward (b) vertical upward
(c) diagonal upwards to the right (NE direction) (c) diagonal upwards to the right (NE direction)
(d) diagonal upwards to the left (NW direction) (d) diagonal upwards to the left (NW direction)
(e) diagonal downwards to the right (SE direction) (e) diagonal downwards to the right (SE direction)
(7) In a refrigeration cycle, heat is rejected by the (8) Types of compressor include
refrigerant in a) Reciprocating
a) Compressor b) Centrifugal
b) Condenser c) Rotary
c) Evaporator d) All the above
d) Expansion valve

(9) In vapor compression refrigeration cycle, (10) In ideal Rankine cycle, water
after expansion valve refrigerant passes absorbs heat in
to…… a) Pump
a) Compressor b) Compressor
b) Condenser c) Condenser
c) Evaporator d) Turbine
d) pump

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