The inter-cooler pressure, for minimum work required, for a two stage reciprocating air compressor, is given by (where p₁ = Intake pressure of air, p₂ = Inter-cooler pressure, and p₃ = Delivery pressure of air)

The inter-cooler pressure, for minimum work required, for a two stage reciprocating air compressor, is given by (where p₁ = Intake pressure of air, p₂ = Inter-cooler pressure and p₃ = Delivery pressure of air)

A

$${{\text{p}}_2} = {{\text{p}}_1} \times {{\text{p}}_3}$$

B

$${{\text{p}}_2} = \frac{{{{\text{p}}_1}}}{{{{\text{p}}_3}}}$$

C

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

D

$${{\text{p}}_2} = \frac{{{{\text{p}}_3}}}{{{{\text{p}}_1}}}$$

The minimum work required for a three stage reciprocating air compressor is ________ the work required for each stage.

A

Equal to

B

Double

C

Three times

D

Six times

Given below are two quantities named 1 and 2. Based on the given information, you have to determine the relationship between the two quantities. You should use the given data and your knowledge of Mathematics to choose between the possible answers. Quantity 1: P and Q can do a work in 6 days and Q and R can do a work in 60/7 days and P and R can do a work in 20/3 days. If Q and R work for first 2 days and left the work. Find the total time taken by P to complete the remaining work. Quantity 2: A and B can do a work in 8/3 days, B and C can do the same work in 3 days and A and C can do the same work in 24/5 days. In what time C alone can complete the work?

A

Quantity 1 > Quantity 2

B

Quantity 1 < Quantity 2

C

Quantity 1 ≥ Quantity 2

D

Quantity 1 ≤ Quantity 2

E

Quantity 1 = Quantity 2 or no relation

Consider the following statements: The volumetric efficiency of a reciprocating compressor can be improved by 1. decreasing the clearance volume 2. cooling the intake air 3. heating the intake air Which of the above statements is/are correct?

A

2 only

B

3 only

C

1 and 2

D

1 and 3

Which of the following statements are true/false?
1. A minimum rate of wages for the time spent by employees for the production of output is minimum time rate.
2. Minimum piece rate is the rate based on the quantity of the output employees have produced.
3. The guaranteed time rate is a minimum rate of remuneration to apply in the case of employees employed on piece work for the purpose of securing to such employees a minimum rate of wages on a time work basis.
4. A minimum rate of remuneration to apply in the case of employees employed on piece work for the purpose of securing to such employees a minimum rate of wages on a time work basis is overtime rate.

A

1, 2, 3 and 4 are true

B

1, 3 are true and 2, 4 are false

C

2, 4 are true and 1, 3 are false

D

3, 4 are true and 2, 1 are false

Give the correct sequence of steps involved in the process of receiving the supplies in a food service establishment.
1. Quality of ingredients are checked with specifications given to supplier.
2. Counts, weights or volume are checked to tally with amounts of various items on the delivery note.
3. Unacceptable items are returned with the person executing the delivery along with a note on delivery challan stating the items returned.
4. Delivery note is checked with copy of the order placed.
5. Delivery challan is countersigned by the receiving authority and the deliverer of supplies.

A

2, 4, 1, 3, 5

B

4, 2, 1, 3, 5

C

1, 4, 2, 5, 3

D

2, 1, 4, 5, 3

If p₁, is the pressure of air entering the L.P. cylinder and p₂ is the pressure of air leaving the L.P. cylinder (or inter-cooler pressure), then the ratio of cylinder diameters for a single acting, two stage reciprocating air compressor with complete intercooling is given by (where D₁ = Dia. of L.P. cylinder, and D₂ = Dia. of H.P. cylinder)

A

D₁/D₂ = p₁ p₂

B

D₁/D₂ = p₁/p₂

C

D₁/D₂ = p₂/p₁

D

None of these

If p₁, is the pressure of air entering the L.P. cylinder and p₂ is the pressure of air leaving the L.P. cylinder (or inter-cooler pressure), then the ratio of cylinder diameters for a single acting, two stage reciprocating air compressor with complete intercooling is given by (where D₁ = Diameter of L.P. cylinder and D₂ = Diameter of H.P. cylinder)

A

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

B

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

C

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

D

None of these

In a single stage, single acting reciprocating air compressor, without clearance, the work-done on the air during isentropic compression is ________ the heat required to raise the temperature of air from T₁ to T₂ at a constant pressure.

A

Equal to

B

Less than

C

Greater than

D

None of these

In a single stage, single acting reciprocating air compressor, without clearance, the work-done on the air during isentropic compression is ________ the heat required to raise the temperature of air from T₁ to T₂ at a constant pressure.

A

Equal to

B

Less than

C

Greater than

D

None of these

The inter-cooler pressure, for minimum work required, for a two stage reciprocating air compressor, is given by (where p₁ = Intake pressure of air, p₂ = Inter-cooler pressure, and p₃ = Delivery pressure of air)

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