📝 [PIPE] QB ID: 1517081204 | Advanced Coaching Series | Set 03 – Elements

An office air conditioning system drew in a quantity of hot air from outside, cooled it to 1 deg C, and mixed it with the internal air of a building. Care was taken to supply enough fresh air to eliminate objectionable odors. The temperature of the space was maintained constant, and yet some people became uncomfortable in the afternoon. Why?

A large paper plant uses its own cogeneration power plant to generate its electricity because

The volumetric output of a centrifugal pump is reduced by closing a valve part way on the intake side of the pump, throttling the intake. The reduction of flow is accompanied by “popping” noises which seem to come from inside the case. What is the probable cause?

If a man touches two metals which were kept together at room temperature, why would one metal feel colder than the other?

The ratio of the internal thermal resistance of a solid to the boundary layer thermal resistance is described by

In heat transfer by conduction, due to symmetry the heat flow at a point is perpendicular to the isothermal surface through the point. This mode of conduction is a characteristic of

Why should you avoid bending or twisting of fan blades in an air conditioning unit?

The heat transferred radially across insulated pipe per unit area

Under normal operating conditions, when a solid material to be dried is placed inside a batch tray dryer, the material is usually subjected

A change of phase directly from vapor to solid without passing through the liquid state is called as

In terms of heat transfer, the use of a cooling tower is said to be more efficient and more economical compared to an ordinary heat exchanger since

When a solid material is said to be “dry” it means that

A hot block is cooled by blowing cool air over its top surface. The heat that is first transferred to the air layer close to the block is by conduction. It is eventually carried away from the surface by

When drying banana chips under the sun, the rate of drying is faster

Reflector of a nuclear reactor are made up of

The function of a moderator in a nuclear reactor is

Which of the following is the most commonly used moderator?

Ammonia leaks in the condenser can be detected by:

Air can be prevented from getting into the system by:

An excessively high head pressure could be caused by:

The solenoid valve is controlled by:

If the discharge side of the thermal expansion valve is warmer than the inlet side, the:

If the pressure is too high:

In a pressurized water reactor (PWR)

Which of the following property of coal has major influence on the design and operation of a steam power plant?

Which of the following is the major consideration while selecting the site for nuclear power plant?

A moderator is used to

Which of the following material is not used as moderator?

Plastics on thin layers of metals are used in nuclear plants

In nuclear power plant which of the following is used to slow down the fast neutrons?

Control rods for nuclear reactors are made of

The reactor in which fissionable fuel produced is more than the fuel consumed is known as

Heavy duty gas turbines typically have

Which of the following is basically a jet engine that exhausts into a turbine generator?

It is referred to as the maximum continuous power available from a hydroelectric power plant even under the most adverse hydraulic conditions.

Working fluids used in refrigeration cycle decreases in temperature as they pass through the throttle valve. The Joule-Thompson coefficient of these fluids is

The interactions that occur between a system and its surroundings as the system executes a process, which is the result of the system being at a temperature different from the surroundings is

Exergy is always

Exergy destruction is a result of

An air pollutant which is the result of burning fuel oils:

A heat engine whose thermodynamic efficiency is greater than that of a Carnot device using the same energy reservoir is known as:

The degrees of power interval in a 4-stroke cycle of a six-cylinder engine is

The portion of sunlight, rich in ultraviolet rays, which has a strong effect on the photographic plate.

Which of the following does not illustrate the effect of temperature or pressure on gas solubility?

Among the effluents that may be released from the hydrothermal reservoir which one is the most toxic?

Newton said that a projectile if given enough horizontal velocity will not fall to the earth. Instead, it moves along a path around the earth. The 1st artificial satellite that verified Newton’s statement is

A refrigerant control valve that maintains a constant pressure in an evaporator

The phenomenon in which air enters a submerged suction pipe from the water surface is called a:

Where groundwater (wells and springs) or surface water (streams and lakes) are used for feedwater, water hardness of 0 – 10 ppm and alkalinity of pH 10 to pH 11 should be considered

Which of the following is not a solid fuel?

The memory lost when the operating power is removed

Canisters of helmets shall be removed immediately after having been used or the seal broken and is unused, must be renewed at least once every:

Pump whose purpose, is to increase the effective water pressure by sucking water from a public service main or private-use water system

A small fitting with a double offset, or shaped like the letter U with the ends turned out

The condition in which droplets of water are carried by steam in the boiler

The primary method of crude oil refining.

Fuel production process wherein heavy oil is changed into gasoline by means of a high pressure, high temperature and longer exposure time

Masonry enclosure having a screened inlet kept partially filled with water by an open body of water

A cushioning device at the end of a trolley, bridge, or other moving parts of a crane operating on rails to minimize shock in the event of collision.

A boom-type mobile crane mounted on endless tracks or treated belts

Alcohol most frequently considered as fuel for internal combustion engine

Which of the following is not a requirement in designing pipe installations?

Part of a valve used to guide and support the valve stem

As a general rule, the cooling water side of the condenser should be scheduled for inspection every:

If the compressor runs continually, the cause might be the:

If the temperature in the icebox is too high, the trouble could be:

If frost forms on the cylinders, the cause would be:

The most likely cause of high superheat would be:

Short-cycling means that the machine:

If the cooling water to the condenser should suddenly fail:

If the thermal expansion valve becomes inoperative the iceboxes will have to be controlled by the:

Slugging is usually caused by:

The crossover connection in an ammonia system can be used to:

At 0 psig, how many BTU are necessary to change 1 lb of water at 212°F of steam?

Radiation is

Steam at 100 psi and 400°F is

Which of the following most closely defines sensible heat?

What is required to raise the temperature of 1 lb of water from 32 to 212°F?

Increasing the pressure has what effect on the boiling point of water?

Heat absorbed by water when it changes from liquid to steam at the boiling point is called

Heat may be transferred in how many ways?

A boiler horsepower is defined as

A boiler’s steam pressure gauge reads 150. What is the absolute pressure?

What does 212 degrees F equal on the Celsius scale?

One boiler horsepower is equal to how many Btu?

A British thermal unit is

Hydronic heat is

Superheated steam is

2,545 Btu represents

A throttling calorimeter is used to measure the quality of

The amount of heat in one pound of saturated steam is equal to

A boiler operating at 100 psi has dry saturated steam and temperature of 338°F. What is the boiler’s water temperature?

A dry pipe is used to

The purpose of the staybolt is

The boiler vent valve is located on the

The purpose of the hole in the end of the staybolt is to

A fusible plug melts at

As the firing rate increases in a boiler equipped with a convection superheater, the steam temperature

When boilers are connected to a common header, it is required that an ample free blowing drain be provided between the stop valves if either of both boilers have

It is permissible to have only one bottom blowdown valve on a boiler when the

When the boiler pressure exceeds _____ psi, it is required that extra-heavy pipe be used on the blowoff system.

Baffles are placed between the tubes of a boiler for the purpose of

A boiler has a steaming capacity of 35,500 lb of steam per hour. The evaporation rate is 10 lb/ft² of heating surface per hour. What is the horsepower rating of this boiler?

Boiler tube size are specified by

The maximum size of boiler blowdown lines, valves, and fitting shall not exceed

The purpose of an expansion tank in a hot water heating system is to provide for the expansion of

Heavy accumulation of soot in a boiler will result in

How are the tubes secured in the fire-tube boiler?

A tube in a fire-tube boiler is surrounded by

Atmospheric pressure is considered to be

In water tube boiler

Diagonal stays are found in

Handholes and manholes are oval

To check the water level in the gauge glass of a steam boiler

The vent valve

A high-pressure boiler has its safety valve set above

Which of the following is an advantage of fire-tube boilers over water tube boilers?

Water walls are found

The best time to bottom blow a boiler is at

A telltale hole is found in a