MCQ COLING LOAD CALCULATIONS
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MCQ COLING LOAD
CALCULATIONS
MCQ increases level of clarity and
understanding. Cooling load calculations
means finding the capacity of the cooling
plant for a particular application. Cooling
loads consist of sensible and latent heat
load contributed by different sources.
Inside and outside design conditions
along with cooling loads help in the
design of air conditioning equipment.

Meaning of cooling load calculations is to find the

Heating capacity of the A/C plant

Cooling capacity of the A/C plant

Both (a) & (b)

None

ANS: (c )

Cooling load calculations include

sensible heat loads

Latent heat loads

Both (a) & (b)

None

ANS: (c )

Sensible heat load is contributed by

6 sources

8 sources

10 sources

None

ANS: (b)

Latent heat is contributed by

5 sources

7 sources

9 sources

None

ANS: (a)

Sensible heat load through a wall is given by

kA dt _{wall}

h A dt _{wall}

UA dt _{wall}

None

ANS: (c )

Sensible heat load through glass is given by

kA dt _{glass}

h A dt _{glass}

U A dt _{glass}

None

ANS: (a)

Sensible heat load contributed by infiltration is
(a ) m^{. }c _{p} (t_{o}—t_{i})
(b) m^{. }C _{v}(t_{o}—t_{i})
(c) (c _{p }+c_{v}) (t_{o}—t_{i})
(d) None
ANS: (a)

Sensible heat load contributed by additional infiltration is
(a ) m^{. }c _{p} (t_{o}—t _{i})
(b) m^{. }C _{v}(t_{o}—t _{i})
© m.(c _{p }+c _{v}) (t_{o}—t _{i})
(d)None
ANS: (a)

Sensible heat load contributed by occupants is

240 kJ/h/person

160 kJ/h/person

400 kJ/h/person

None

ANS: (b)

Sensible heat load contributed by products being cooled is

m c _{p} (t–t _{freeing}) +m c _{p}(t _{final}t _{freezing})

m Latent heat of products

Both (a) & (b)

None

ANS: (c )

Sensible heat load contributed by miscellaneous factors is

30 %

20%

10%

None

ANS: (c )

Sensible heat load contributed by ventilation for 10 air changes per hour is

ρ 10 V _{room }C _{v} (t_{o}—t_{i})

ρ 10 V_{room }C_{p} (t_{o}—t_{i})

Both (a) & (b)

None

ANS: (b)

Latent heat load through a wall is given by

kA Latent heat

h A Latent heat

UA Latent heat

None

ANS: (d)

Latent heat load through glass is given by

kA Latent heat

h A Latent heat

UA Latent heat

None

ANS: (d)

Latent heat load contributed by infiltration is
(a)m^{. }c _{p} Latent heat of moisture
(b)m^{. }C _{v }Latent heat of moisture
©m. Latent heat of moisture
(d)None
ANS: (c)

Latent heat load contributed by additional infiltration is
(a ) m^{. }c _{p} (t_{o}—t_{i})
(b)m^{. }C _{v}(t_{o}—t_{i})
© m.(c _{p }+c_{v}) (t_{o}—t_{i})
(d)None
ANS: (d)

Latent heat load contributed by occupants is
(a)240 kJ/h/person
(b)160 kJ/h/person
©400 kJ/h/person
(d)None
ANS: (a)

Latent heat load contributed by products being cooled is
(a) m c _{p} (t–t _{freeing}) +m c _{p}(t _{final}t _{freezing})
(b)m Latent heat of products
©Both (a) & (b)
(d)None
ANS: (b )

Latent heat load contributed by miscellaneous factors is

30 %

20%

10%

None

ANS: (c )

Latent heat load contributed by ventilation for 10 air changes per hour is

ρ 10 V_{room }C _{v} (t_{o}—t _{i})

ρ 10 V_{room }C_{p} (t_{o}—t _{i})

Both (a) & (b)

None

ANS: (d)

Sensible heat factor (SHF) is the ratio of

Sensible heat load/Latent heat load

Latent heat load/Sensible heat load

Sensible heat load/ (SHL +LHL)

None
ANS: (c )

Room sensible heat factor is

RSHL/RLHL

RLHL/(RSHL+RLHL)

RSHL/(RSHL+RLHL)

None
ANS: (c )

Grand sensible heat factor is

GSHL/(GSHL+GLHL)

GSHL/GLHL

Both (a) & (b)

None
ANS: (a)

GSHL is

RSHL+RLHL

TRHL+TVHL

TVSHL+TVLHL

None
ANS: (b)

Inside design conditions are

Constant

Variable

Can’t say

None
ANS: (a)

Outside design conditions are

Constant

Variable

Can’t say

None
ANS: (b)

Which heat load is more in the rainy season?

SHL

LHL

Both (a) & (b)

None