41. Heat pumps reduce dependency on ______. fossil fuels
a) renewable energy (erneuerbare Energie)
b) fossil fuels (fossile Brennstoffe)

42. They play a key role in reducing ______ footprints. carbon
a) carbon (Kohlenstoff-)
b) ecological (ökologische)

43. Heat pumps are ideal for ______ heating systems. underfloor
a) wall-mounted (wandmontierte)
b) underfloor (Fußboden-)

44. They can be paired with ______ for better efficiency. solar panels
a) solar panels (Solarpaneele)
b) wind turbines (Windturbinen)

45. Retrofitting old homes with heat pumps is ______. possible
a) difficult (schwierig)
b) possible (möglich)

46. Many governments offer ______ for installing heat pumps. subsidies
a) subsidies (Subventionen)
b) taxes (Steuern)

47. Heat pumps contribute to meeting global ______ goals. climate
a) climate (Klima-)
b) financial (finanzielle)

48. They help reduce air pollution in ______ areas. urban
a) rural (ländlichen)
b) urban (städtischen)

49. Modern designs are compact and ______. aesthetically pleasing
a) expensive (teuer)
b) aesthetically pleasing (ästhetisch ansprechend)

50. Advanced systems have ______ functions for cold climates. defrosting
a) defrosting (Abtaufunktionen)
b) cooling (Kühl-)

51. Heat pump efficiency varies based on outdoor temperatures and ______. insulation
a) insulation (Isolierung)
b) heating systems (Heizsysteme)

52. Ground-source systems maintain efficiency regardless of ______ changes. weather
a) seasonal (saisonalen)
b) weather (Wetter-)

53. Variable-speed compressors improve heat pump ______. performance and lifespan
a) performance and lifespan (Leistung und Lebensdauer)
b) cost and design (Kosten und Design)

54. Heat pumps can cool ______ rooms or data centers efficiently. server
a) server (Server-)
b) boiler (Heizkessel-)

55. Industrial heat pumps recover ______ heat for reuse. waste
a) waste (Abfall-)
b) geothermal (Geothermie-)

56. The seasonal Coefficient of Performance (SCOP) measures ______. annual efficiency
a) peak performance (Höchstleistung)
b) annual efficiency (jährliche Effizienz)

57. Air-source heat pumps use outdoor units to draw heat from the ______. air
a) air (Luft)
b) ground (Boden)

58. Monoblock systems house all components in one ______ unit. outdoor
a) indoor (Innen-)
b) outdoor (Außen-)

59. Split systems separate the compressor and indoor ______. heat exchanger
a) condenser (Kondensator)
b) heat exchanger (Wärmetauscher)

60. Ductless systems distribute heat via wall-mounted ______ units. indoor
a) outdoor (Außen-)
b) indoor (Innen-)