Question 1
Select the false statement for the Bernoulli equation
Correct Answer : a
Selected Answer : a
Explanation : It can be used for unsteady flow. False, The Bernoulli equation is applicable to steady flow, not unsteady flow. In unsteady flow, the equation does not hold because it assumes a constant energy along a streamline, which is not the case when flow conditions are changing with time. It can be used along a streamline: True. The Bernoulli equation is based on the concept of conservation of energy along a streamline. It relates the kinetic energy, potential energy, and pressure energy of a fluid particle at different points along its path along a streamline. It can be used in an inertial coordinate system: True. The choice of coordinate system (inertial or non-inertial) does not affect the applicability of the Bernoulli equation, as long as the flow is steady. Inertial coordinate systems are typically used for most fluid flow problems, but the equation can also be applied in rotating or accelerating reference frames when necessary. It can be used in an inviscid flow: True. The Bernoulli equation assumes inviscid flow, which means it neglects the effects of viscosity in the fluid. While real fluids have viscosity, the Bernoulli equation is still useful in situations where viscous effects are relatively small or can be neglected, such as in many aerodynamic and fluid dynamics problems.
Explanation :  does not affect the applicability of the Bernoulli equation, as long as the flow is steady. Inertial coordinate systems are typically used for most fluid flow problems, but the equation can also be applied in rotating or accelerating reference frames when necessary. It can be used in an inviscid flow: True. The Bernoulli equation assumes inviscid flow, which means it neglects the effects of viscosity in the fluid. While real fluids have viscosity, the Bernoulli equation is still useful in situations where viscous effects are relatively small or can be neglected, such as in many aerodynamic and fluid dynamics problems.)
Question 2
The viscosity of a fluid varies with
Correct Answer : d
Selected Answer : d
Explanation : The viscosity of a fluid primarily varies with Temperature and Pressure. For liquids, viscosity decreases as temperature increases and slightly increases with pressure. For gases, viscosity increases with temperature and is relatively independent of pressure. Density also plays a role, particularly in calculating kinematic viscosity.
Explanation : 
Question 3
A 200-ft*100-ft room has been prepared for painting. The walls are 7 ft high and willrequire two coats of paint on the previously painted surface for proper coverage. If 1gal of paint covers 300 ft^2 ,the number of gallons of paint needed to paint the walls ismost nearly
Correct Answer : b
Selected Answer : a
Explanation : Given details & Solution Length = 200 ft Width = 100 ft Height = 7 ft Area of side walls = 2 x (100 ft x 7 ft) = 1400 ft^2 Area of back & front wall = 2 x (200 ft x 7 ft) = 2800 ft^2 Total paint area = 1400 + 2800 = 4200 ft^2 1 Gallon of paint will cover 300 ft^2 area , then to cover 4200 ft^2 of area Paint required = 4200/300 = 14 Gallon of paint. For 2 Coat, 28 ( 14 * 2 ) Gallon of Paint Required. Option B is the Right Answer.
Explanation :  = 1400 ft^2 Area of back & front wall = 2 x (200 ft x 7 ft) = 2800 ft^2 Total paint area = 1400 + 2800 = 4200 ft^2 1 Gallon of paint will cover 300 ft^2 area , then to cover 4200 ft^2 of area Paint required = 4200/300 = 14 Gallon of paint. For 2 Coat, 28 ( 14 * 2 ) Gallon of Paint Required. Option B is the Right Answer.)
Question 4
The pressure loss due to friction in horizontal section of constant diameter pipe can
be calculated using:
Correct Answer : a
Selected Answer : a
Explanation : The pressure loss due to friction in a horizontal section of a constant diameter pipe is typically calculated using: A) Darcy equation The Darcy equation, or the Darcy-Weisbach equation, is commonly used to estimate pressure drop or loss in a pipe due to friction. It relates the friction factor, length of the pipe, diameter, flow rate, and properties of the fluid.
Explanation :  Darcy equation The Darcy equation, or the Darcy-Weisbach equation, is commonly used to estimate pressure drop or loss in a pipe due to friction. It relates the friction factor, length of the pipe, diameter, flow rate, and properties of the fluid.)
Question 5
If a specification is in conflict with a note on the drawings, which statement is
correct?
Correct Answer : c
Selected Answer : c
Explanation : If a specification conflicts with a note on the drawings, the specification takes precedence over the drawing. The higher "Order of Precedence of Documents" governs. For example, a precedence clause may state that "In the event of conflict, the specifications take precedence over drawings; large scale drawings take precedence over small scale drawings". However, precedence clauses are often discouraged because they can cause more problems than they solve. A request for information (RFI) is a formal document that can be used to resolve conflicts or discrepancies between the project specifications and the architectural drawings.
Explanation : 
Question 6
air with the following properties enters the compressor of an aircraft gas turbine:P=5.45 psia, T=430°R, V=600 fps, M=150 lbm/secThe cross sectional area (ft^2) at the Intel is
Correct Answer : d
Selected Answer : d
Explanation : EXPLANATION: Mass flow rate of air in gas turbine (ma)= ρ⋅v⋅A Where ρ=P/(R⋅T) where R = 53.353lbf.ft/lb.°R for air P = 5.45 psi = 5.45lbf/in2 = 5.45 x 144 = 784.8 lbf/ft2 ρ=(784⋅8)/(53⋅353×430)=0.0342 lb/ft3 ∴ ma = 0.0342 x 600 x A 150 = 0.0342 x 600 x A ∴ A = 150 / (0.0342 x 600) = 7.30 ft^2
Explanation : = ρ⋅v⋅A Where ρ=P/(R⋅T) where R = 53.353lbf.ft/lb.°R for air P = 5.45 psi = 5.45lbf/in2 = 5.45 x 144 = 784.8 lbf/ft2 ρ=(784⋅8)/(53⋅353×430)=0.0342 lb/ft3 ∴ ma = 0.0342 x 600 x A 150 = 0.0342 x 600 x A ∴ A = 150 / (0.0342 x 600) = 7.30 ft^2)
Question 7
The parameter which determine the friction for turbulent flow in a rough pipe are
Correct Answer : c
Selected Answer : c
Explanation : For turbulent flow, the friction factor is a function of relative roughness only, but that is only true if Reynold's number is very high. This is due to the fact that as the Reynolds number rises, the thickness of the laminar sublayer (a viscous sublayer) decreases. The thickness of the laminar sublayer, which directly affects the flow for very high Reynolds numbers, is comparable to the surface roughness. The flow is exposed to surface roughness when the laminar sublayer is too thin. In this case, the laminar sublayer contributes very little to the frictional losses, primarily caused by the protruding roughness elements in the main flow. So the correct option is C. Reynolds number and relative roughness.
Explanation :  decreases. The thickness of the laminar sublayer, which directly affects the flow for very high Reynolds numbers, is comparable to the surface roughness. The flow is exposed to surface roughness when the laminar sublayer is too thin. In this case, the laminar sublayer contributes very little to the frictional losses, primarily caused by the protruding roughness elements in the main flow. So the correct option is C. Reynolds number and relative roughness.)
Question 8
TQM Stands for
Correct Answer : c
Selected Answer : c
Explanation : TQM stands for Total Quality Management. It's a management approach that focuses on delivering high-quality products and services to maximize customer satisfaction and meet regulatory standards. TQM is a framework that revolves around the principle that quality needs to be maintained in every aspect of a company's operations. This means that everyone in the organization is accountable for the quality of the output. TQM focuses more on employees and customers. The four pillars of TQM are: Customer focus Continuous improvement Employee involvement A process-oriented approach TQM was developed in Japan and promulgated by Edward Deming and Joseph M Juran.
Explanation : 
Question 9
Minor losses in a piping system are
Correct Answer : d
Selected Answer : d
Explanation : uploads/Question_Image/c633419318756a5fdf4118eabc5cc1ab01ba909d.png
Explanation : 
Question 10
In a completely turbulent flow, the head loss
Correct Answer : b
Selected Answer : b
Explanation : In a completely turbulent flow, the head loss is typically proportional to the square of the velocity. Therefore: B) Increases with velocity squared This relationship is described by the Darcy-Weisbach equation for head loss in a pipe, where the head loss ( ℎ � h f ) is proportional to the square of the velocity ( � V). The equation is often written as: ℎ � = � � � � 2 2 � h f =f D L 2g V 2 where � f is the Darcy friction factor, � L is the length of the pipe, � D is the diameter of the pipe, � V is the velocity, and � g is the acceleration due to gravity.
Explanation :  Increases with velocity squared This relationship is described by the Darcy-Weisbach equation for head loss in a pipe, where the head loss ( ℎ � h f ) is proportional to the square of the velocity ( � V). The equation is often written as: ℎ � = � � � � 2 2 � h f =f D L 2g V 2 where � f is the Darcy friction factor, � L is the length of the pipe, � D is the diameter of the pipe, � V is the velocity, and � g is the acceleration due to gravity.)
Question 11
Increases with flow rate To determine the flow rate using a square edged orifice, the
pressure must be measured upstream of the orifice and
Correct Answer : c
Selected Answer : c
Explanation : Just downstream of the orifice at the vena contracta is where the pressure must be measured (along with upstream) for accurate flow rate determination using a square-edged orifice. Measurement Principle Flow rate through a square-edged orifice is calculated from the differential pressure (ΔP) across the plate, where upstream pressure is tapped ~1 pipe diameter (D) before the orifice, and downstream at the vena contracta—the point of minimum pressure and maximum velocity constriction.
Explanation :  for accurate flow rate determination using a square-edged orifice. Measurement Principle Flow rate through a square-edged orifice is calculated from the differential pressure (ΔP) across the plate, where upstream pressure is tapped ~1 pipe diameter (D) before the orifice, and downstream at the vena contracta—the point of minimum pressure and maximum velocity constriction.)
Question 12
Air is flowing through a 6mm diameter tube with 50m/s velocity and c1/2air=1.5*10-
5 m2/s . this flow is considered (Hint Re=VD/c
1/2)
Correct Answer : c
Selected Answer : c
Explanation : uploads/Question_Image/7d7cf1da4c17222e54e93a142f47ac85bc31d9a2.png
Explanation : 
Question 13
If an absorption chiller load is 500 tons, the required heat input(Btu/hr) to a chiller
with a COP of 0.80 is most nearly: 1 ton=12,000Btu/hr
Correct Answer : c
Selected Answer : c
Explanation : uploads/Question_Image/2980e88dde7065794286e2ca59b2fad45708a432.jpeg
Explanation : 
