Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| Miscibility is the ability of the fluid to? Readily mix with other fluid Reacts with air and forms corrosion compounds Reacts with water and forms acidic compounds Reacts with water and air and burns | show 🗑
|
||||
| show | convection
🗑
|
||||
| The heat energy change that is associated with a change in the phase (state) is? | show 🗑
|
||||
| show | Dew bulb
🗑
|
||||
| True or false RTD which measure temperature have a positive temperature coefficient? | show 🗑
|
||||
| show |
🗑
|
||||
| show 🗑
|
|||||
| show | 746
🗑
|
||||
| show | True
🗑
|
||||
| show | Chart curved boundary
🗑
|
||||
| show | Doppler effect
🗑
|
||||
| In which of the following heat transfer will be in the form of waveform. Conduction All the options are correct Convection Radiation | show 🗑
|
||||
| show | Equal to
🗑
|
||||
| The temperature-resistance characteristic of a thermistor is _________ Linear Non linear | show 🗑
|
||||
| Which of the following type of controllers are used in HVAC applications? PI I ID P | show 🗑
|
||||
| show | 24v
🗑
|
||||
| show | Faster
🗑
|
||||
| The ________ of the manifold gauge set is used to charge, evacuate, add oil and recover refrigerant from a refrigeration and air conditioning system: Blue hose, Yellow hose or Red hose | show 🗑
|
||||
| _______ use two special helical rotors that introduce suction vapors then compress them: Scroll Compressors, Reciprocating Compressors, All the options are correct or Screw Compressors | show 🗑
|
||||
| 1 Watt = _____ Btu? 3140, 0.341, 341 or 3.41 | show 🗑
|
||||
| show | Heavier
🗑
|
||||
| show | Halide leak detector
🗑
|
||||
| show | Floc point
🗑
|
||||
| An oil separator is located in the _____: Liquid line Expansion line Suction line Discharge line | show 🗑
|
||||
| Higher the ambient temperatures, ____ will be the evacuation time of the refrigerants from the system: Higher Lesser | show 🗑
|
||||
| show | Venting characteristics
🗑
|
||||
| A high pressure steam boiler operates at a pressure greater than ______ : 15 psig 20 psig 25 psig 5 psig | show 🗑
|
||||
| show | Latent heat
🗑
|
||||
| show | Liquid line
🗑
|
||||
| show | 6 ohms
🗑
|
||||
| Current in a closed circuit is limited by which of the following: Resistance Heat Temperature Voltage | show 🗑
|
||||
| show | 3140
🗑
|
||||
| show | 9
🗑
|
||||
| show | Nitrogen
🗑
|
||||
| Which of the following is used to remove the trapped air from a low pressure system from the top of the condenser: Purge unit Compressor unit Recover unit Discharge unit | show 🗑
|
||||
| The tubes of the indoor evaporator coils are made of which of the following: Aluminum Copper Steel Brass | show 🗑
|
||||
| show | Clockwise
🗑
|
||||
| show | Reciprocating compressor
🗑
|
||||
| show | Dalton's law
🗑
|
||||
| True or False The larger the diameter of the center hose, higher will be evacuation time of the refrigerant from the system: | show 🗑
|
||||
| show | sublimation
🗑
|
||||
| show | Inlet line
🗑
|
||||
| At 32°F, 1 lb of ice can be changed to 1 lb of water by adding ____ Btu 144 Btu 36 Btu 108 Btu 72 Btu | show 🗑
|
||||
| show | series
🗑
|
||||
| Relays and contactors are ____ control switches: pressure-activated temperature-activated electrically operated manually operated | show 🗑
|
||||
| show | flue gases
🗑
|
||||
| show | True
🗑
|
||||
| Air handling equipment controls which of the following parameter: quality of air humidity temperature All the options are correct | show 🗑
|
||||
| Curved boundary In Psychrometric chart indicates which of the following: Dry bulb temperature Latent heat Dew point temperature line Humidity ratio | show 🗑
|
||||
| In water-tube boilers, pressures range from ______ : 50 to 500 psig 50 to 5000 psig 50 to 500,000 psig 50 to 50,000 psig | show 🗑
|
||||
| show | Latent heat
🗑
|
||||
| _____ is a combination of both sensible heat and latent heat: Enthalpy Entropy Resultant heat Absolute heat | show 🗑
|
||||
| show | 4-20 mA
🗑
|
||||
| Approximately _____ voltage is required for creating a spark on a spark ignition system: 150V 1500V 15000V 150000V | show 🗑
|
||||
| _____ is the air that is mixed with the fuel before the fuel reaches the burner: Primary air Secondary air Tertiary air None of the answers are correct | show 🗑
|
||||
| Which one of the following in the refrigeration cycle changes the refrigerant from low pressure gas to high pressure gas: Evaporator Compressor Condenser Expansion device | show 🗑
|
||||
| show | Exhaust or relief dampers
🗑
|
||||
| True or false Heat transferred by radiation travels through space without heating the space | show 🗑
|
||||
| show | Manometer
🗑
|
||||
| Disposable air filters should be changed atleast _______ times in a year: Twice Thrice Four times Once | show 🗑
|
||||
| show | solid fuels
🗑
|
||||
| The reclaimed refrigerant must meet the standards of _________ before it can be resold: ARI 500 ARI 740 ARI 1000 ARI 700 | show 🗑
|
||||
| show | 4%
🗑
|
||||
| show | False
🗑
|
||||
| Recovery cylinders are color coded with grey bottom and _______ top: Red Blue Yellow Green | show 🗑
|
||||
| At _________ this superheated refrigerant vapor pressure and temperature is added: None of the options are correct Condenser Evaporator Compressor | show 🗑
|
||||
| The power developed by the centrifugal pump is proportional to _________ its speed: Square Proportional to Cube Quadruple | show 🗑
|
||||
| show | 30
🗑
|
||||
| show | 100 and 275 degrees
🗑
|
||||
| show | Horizontal lines
🗑
|
||||
| show | 15 psi
🗑
|
||||
| show | 5 to 7 times
🗑
|
||||
| show | False
🗑
|
||||
| _______ is the cubic feet of the mixture per pound of dry air: Humidity ratio Specific volume Sensible heat ratio Enthalpy | show 🗑
|
||||
| show | outdoor fan
🗑
|
||||
| show | Solenoid valve
🗑
|
||||
| show | Capacitor
🗑
|
||||
| show | Ball bearing type motors
🗑
|
||||
| True or false Square cut or butt joints are not permitted on corners of ductboard sections: | show 🗑
|
||||
| Which of the following motor is best suited for speed control applications: Induction motor Synchronous motors DC shunt motors Reluctance motor | show 🗑
|
||||
| show | Prevent liquid refrigerant from entering compressor
🗑
|
||||
| Which of the following is not available in heat pump: compressor crankcase heater suction line accumulator reversing valve low pressure sensing switch | show 🗑
|
||||
| show | 1800
🗑
|
||||
| A thermostatic expansion valve modulates to maintain suction _____: superheat pressure temperature volume | show 🗑
|
||||
| An amperage is the measurement of which of the following: Voltage Current Electric charge Power | show 🗑
|
||||
| show | increases
🗑
|
||||
| Which of the following motors are more rugged and can handle more load: Sleeve bearing type motors Ball bearing type motors | show 🗑
|
||||
| Excessive pressure drop in liquid lines will result in which of the following: Both the options are correct Partial vaporization Flashing | show 🗑
|
||||
| show | Short circuit
🗑
|
||||
| show | Faster
🗑
|
||||
| show | 78%
🗑
|
||||
| True of false The wetback fire tube boiler has more heating surface compared to dryback fire tube boiler: | show 🗑
|
||||
| show | Compressor
🗑
|
||||
| As the number of poles in a motor increases, the speed of the motor _______: Increases Remains same Decreases | show 🗑
|
||||
| show | Compressor
🗑
|
||||
| The refrigerant holding capacity of the accumulator is based on an average conditions of ______ percent fill under running conditions: 50% 75% 80% 65% | show 🗑
|
||||
| show | Static pressure
🗑
|
||||
| True of false A filter drier is located in the Liquid line at the outlet of the condenser: | show 🗑
|
||||
| show | Reciprocal Compressors
🗑
|
||||
| When a system is circulating an excessive amount of oil, the oil indicator may become saturated. This results in the indicator to appear in _______ color Red Brown Orange Yellow | show 🗑
|
||||
| show | Both the options are correct
🗑
|
||||
| show | Centrifugal
🗑
|
||||
| show | Cube
🗑
|
||||
| To minimize the possibility of freeze-up or corrosion, the maximum safe limits of moisture in Refrigerant R-22 is: 15 ppm 60 ppm 30 ppm 45 ppm | show 🗑
|
||||
| _______ Heat that can be measured or felt Internal heat External heat Sensible heat Latent heat | show 🗑
|
||||
| show | True
🗑
|
||||
| show | Lower
🗑
|
||||
| True or false Purging refers to the release of air or noncondensable gases from the system: | show 🗑
|
||||
| show | True
🗑
|
||||
| True or false In boiler safety valves can be used to vent: | show 🗑
|
||||
| show | Reciprocation Compressor
🗑
|
||||
| Induction motor always operated with ______ power factor: Unity Lagging Leading | show 🗑
|
||||
| show | 45 degrees
🗑
|
||||
| show | 1,000
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
Tg89