During the sensible cooling process ________ .

Efficiency of the Carnot engine is given as 80%. If the cycle direction be reversed, what will be the value of coefficient of performance of reversed Carnot cycle?

The coefficient of performance is the ratio of the refrigerant effect to the ________.

प्रदर्शन का गुणांक रेफ्रिजरेंट प्रभाव और ________ का अनुपात है।

A. heat of compression

B. work done by compressor

C. enthalpy increases in compressor

Moisture in Freon refrigeration system causes ________ .

Vertical lines on pressure-enthalpy chart show constant ________ .

Lithium bromide in vapour absorption refrigeration system is used as _______.

The most suitable refrigerant for a commercial ice plant is________ .

Fittings in ammonia absorption refrigeration system are made of ________ .

Moisture in a refrigerant system is removed by ________ .

रेफ्रिजरेंट प्रणाली में नमी को ________ द्वारा हटा दिया जाता है।

A. driers

B. filter driers

C. desiccants

Which of the following refrigerant characteristics change constantly during the cooling cycle?

The refrigeration plants are charged by refrigerants from the cylinder at the ________ .

In ammonia-water vapour absorption refrigeration system:

Lowering the evaporator pressure in a vapour compression cycle

Sub-cooling in a vapour compression cycle 

Air refrigeration is preferably used in aircrafts because

The expansion process in the throttling device of a vapour compression cycle is 

A Bell Coleman cycle is :

The food compartment of a refrigerator is maintained at 4°C by removing heat from it at a rate of 360 kJ/min. If the required power input to the refrigerator is 2 kW, the COP of the refrigerator is:

1 ton of refrigeration is equivalent to

A tapered roller bearing :

Select the incorrect statement from the following about hydrodynamic lubrication.

While transmitting power through a shaft ________ is used to hold and support the shaft.

Choose the correct option in which the Babbitt bearing is used?

The important factor to be considered while selecting a bearing is

Which of the following can said to be equivalent with the frictional torque transmitted by a cone clutch?

Which of the following can be said to be equivalent with the frictional torque transmitted by a disc or plate clutch?

Ball bearings are generally made up of

In hydrostatic bearing, pressure to lubricant is supplied by

Tapered roller bearings can take ________ .

In hydrostatic bearing the starting friction is ________ .

A friction circle is a circle drawn when the journal rotates in a bearing. Its radius depends on the coefficient of friction and ________ .

Which of the following is a typical disadvantage of a roller contact bearing?

In standard taper roller bearings, the angle of taper of outer raceway is ________ .

Antifriction bearings are

घर्षणरोधी बीयरिंग हैं

A. Sleeve bearings

B. Hydrodynamic bearings

C. Thin lubricated bearings

D. Ball and roller bearings

The most suitable bearing for carrying very heavy loads with slow speed is________ .

Which of the following is self-aligning bearing?

Which of the following bearings can take large thrust loads

The cone angle of a pivot bearing is increased by 2%. The maximum load carrying capacity of the bearing will increase by

In railway axle boxes, the bearing used is 

Regarding journal bearing under film lubrication condition which of the following statement is correct?

Frictionless resistance is

Which of the following is antifriction bearing?

A sliding bearing which can support steady loads without any relative motion between the journal and bearing is called

Two gears are said to have a conjugate motion if ________ .

What is the radial distance of a tooth from the pitch circle to the top of the tooth known as?

The gear train usually employed in clocks is a

Gear teeth are made harder to avoid

In an involute gear, the base circle must be ________ .

Which type of gear will be used for non-parallel and non-intersecting shafts?

What is the addendum of a cycloidal gear tooth?

The minimum required centre distance of two mating spur gears is decided based on