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Applications Questions Set 27:

Quiz Mode

Water fouling does not cause

Increase in heat transfer rate

Restrict water flow

Reduction in heat transfer rate

Tube insulation

Solution:

Which of the following refrigerants has the least viscosity at a vapor temperature of -15°C and atmospheric pressure?

R-764

R-744

R-11

R-12

Solution:

The formula for the force exerted by a jet of water on a moving curved plate is given by:

pa(v-u)*(v-u)(1+sin k)

pav*(v-u)(1+cos k)

pa(v-u)*(v-u)

pa(v-u)

Solution:

What is the result of a reduction in operating pressure in the air refrigeration cycle?

Decrease in C.O.P.

Increase in C.O.P.

Always decreases

No change in C.O.P.

Solution:

If a reversed Carnot cycle acting as a heat pump gives an efficiency of 25%, then calculate the value of the Coefficient of Performance (COP) of the heat pump.

0.4

Solution:

In a Pelton turbine, the work done per unit weight of the water jet striking the runner blades is given by the formula:

V_w1*u/g

[V_w1 + V_w2]/g

[V_w1 + V_w2] u

[V_w1 + V_w2] u/g

Solution:

The Multi-Point Fuel Injection system can be functionally divided into which of the following main components?

electronic control system

air induction system

all of the mentioned

fuel system

Solution:

A 4-stroke, 4-cylinder reciprocating engine has a cylinder diameter of 4 cm, a stroke length of 7 cm, and a clearance volume of 2 cm³. Find the engine capacity in cm³.

110 cm³

252 cm³

400 cm³

352 cm³

Solution:

Consider a single-cylinder two-stroke internal combustion engine with an under-square ratio of 0.90 and a displacement volume of 1884 cc. What is the value of the stroke of the engine? Given: π = 3.14 and √(10) = 3.162.

19.89 cm

21.08 cm

18.75 cm

24.90 cm

Solution:

If the lower temperature is fixed in a refrigerating machine working on the reversed Carnot cycle, how can the Coefficient of Performance (C.O.P.) be increased?

Decreasing the higher temperature

Operating the machine at a higher speed

Operating the machine at a lower speed

Increasing the higher temperature

Applications Questions Set 27:

Water fouling does not cause

Solution:

Which of the following refrigerants has the least viscosity at a vapor temperature of -15°C and atmospheric pressure?

Solution:

The formula for the force exerted by a jet of water on a moving curved plate is given by:

Solution:

What is the result of a reduction in operating pressure in the air refrigeration cycle?

Solution:

If a reversed Carnot cycle acting as a heat pump gives an efficiency of 25%, then calculate the value of the Coefficient of Performance (COP) of the heat pump.

Solution:

In a Pelton turbine, the work done per unit weight of the water jet striking the runner blades is given by the formula:

Solution:

The Multi-Point Fuel Injection system can be functionally divided into which of the following main components?

Solution:

A 4-stroke, 4-cylinder reciprocating engine has a cylinder diameter of 4 cm, a stroke length of 7 cm, and a clearance volume of 2 cm³. Find the engine capacity in cm³.

Solution:

Consider a single-cylinder two-stroke internal combustion engine with an under-square ratio of 0.90 and a displacement volume of 1884 cc. What is the value of the stroke of the engine? Given: π = 3.14 and √(10) = 3.162.

Solution:

If the lower temperature is fixed in a refrigerating machine working on the reversed Carnot cycle, how can the Coefficient of Performance (C.O.P.) be increased?

Solution:

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