Which component of the carburettor is used to produce low pressure in the throat of the carburettor?

Which component of the carburettor is used to maintain a constant level of fuel in the carburettor?

A

Main jet

B

Compensating jet

C

Float chamber

D

Economiser

You develop an enterprise application, called XYZApplication that includes a Windows Form presentation layer, middle-tier components for business logic and data access, and a Microsoft SQL Server database.
You are in the process of creating a middle-tier component that will execute the data access routines in your application. When data is passed to this component, the component will call several SQL Server stored procedures to perform database updates. All of these procedure calls run under the control of a single transaction.
The code for the middle-tier component will implement the following objects:
SqlConnection cn = new SqlConnection();
SqlTransaction tr;
If two users try to update the same data concurrently, inconsistencies such as phantom reads will occur. You must now add code to your component to specify the highest possible level of protection against such inconsistencies.
Which code segment should you use?

A

tr = cn.BeginTransaction(?ReadCommitted?);

B

tr = cn.BeginTransaction(IsolationLevel.ReadCommitted);

C

tr = cn.BeginTransaction(IsolationLevel.Serializable);

D

tr = cn.BeginTransaction(?Serializable?);

The critical pressure ratio is given by (where p₁ = Initial pressure of steam and p₂ = Pressure of steam at throat or critical pressure)

A

$${{\text{p}}_1} \times {{\text{p}}_2}$$

B

$$\frac{{{{\text{p}}_1}}}{{{{\text{p}}_2}}}$$

C

$$\frac{{{{\text{p}}_2}}}{{{{\text{p}}_1}}}$$

D

$${{\text{p}}_1} + {{\text{p}}_2}$$

In a compound steam engine, the first stage of expansion is carried out in a high pressure cylinder whereas the last expansion is completed in low pressure cylinder. The diameter of high pressure cylinder is _________ the low pressure cylinder.

A

Equal to

B

Less than

C

More than

D

None of these

One day you wake with a sore throat and a runny nose. Your doctor takes a swab from your throat, sends it to a lab, and telephones you the next day to say that antibiotic will not help you get better. Which of the following is the most likely reason for the doctor's statement?

A

Having waited a day, it is too late to take an antibiotic

B

You need an antiseptic, not an antibiotic

C

You need to be vaccinated instead of taking an antibiotic

D

You are infected by a virus

How is diffuser throat area At2 related to the nozzle throat area At1?

A

At2 = At1

B

At2 > At1

C

At2 < At1

D

At2 At1 = 1

Why is the diffuser throat area greater than the nozzle throat area?

A

To reduce speed

B

To maintain constant mass flow rate

C

Rise in entropy within diffuser

D

Rise in entropy within nozzle

If D is the depth of water upstream of the throat above its sill, B is the width of the throat, to achieve critical flow in an open venturi flume, the theoretical maximum flow Q, is

A

Q = 1.71 $${\text{B}}{{\text{D}}^{\frac{1}{2}}}$$

B

Q = 1.71 BD

C

Q = 1.71 $${\text{B}}{{\text{D}}^{\frac{3}{2}}}$$

D

Q = 1.71 $${\text{B}}{{\text{D}}^{\frac{2}{3}}}$$

In order to avoid tendency of separation at throat in a Venturimeter, the ratio of the diameter at throat to the diameter of pipe should be

A

$$\frac{1}{{16}}$$ to $$\frac{1}{8}$$

B

$$\frac{1}{8}$$ to $$\frac{1}{4}$$

C

$$\frac{1}{4}$$ to $$\frac{1}{3}$$

D

$$\frac{1}{3}$$ to $$\frac{1}{2}$$

Fugacity of a component in an ideal gas mixture is euqal to the partial pressure of that component in the mixture. The fugacity of each component in a stable homogeneous solution at contant pressure and temperature __________ as its mole fraction increases.

A

Decreases

B

Decreases exponentially

C

Increases

D

Remains constant